Physical exercise is important for maintaining physical fitness and can contribute to maintaining a healthy weight, regulating digestive health, building and maintaining healthy bone density, muscle strength, and joint mobility, promoting physiological well-being, reducing surgical risks, and strengthening the immune system. Some studies indicate that exercise may increase life expectancy and the overall quality of life.[10] People who participate in moderate to high levels of physical exercise have a lower mortality rate compared to individuals who by comparison are not physically active.[11] Moderate levels of exercise have been correlated with preventing aging by reducing inflammatory potential.[12] The majority of the benefits from exercise are achieved with around 3500 metabolic equivalent (MET) minutes per week.[13] For example, climbing stairs 10 minutes, vacuuming 15 minutes, gardening 20 minutes, running 20 minutes, and walking or bicycling for transportation 25 minutes on a daily basis would together achieve about 3000 MET minutes a week.[13] A lack of physical activity causes approximately 6% of the burden of disease from coronary heart disease, 7% of type 2 diabetes, 10% of breast cancer and 10% of colon cancer worldwide.[14] Overall, physical inactivity causes 9% of premature mortality worldwide.[14]
In the 1950s postwar period, American capitalism prospered and families began moving to the suburbs. This led to an increase in automobile sales, as driving became a more viable transportation option than walking or taking public transportation, which took a small toll on public health. At the same time, families increasingly owned televisions and stay-at-home mothers spent much of their time at home during the day. As such, stay-at-home mothers became television's primary audience during the day, and created a market for televised workouts.
First, we must follow the same guidelines and general protocols for building a stronger ‘foundation’ as we have outlined in the fibromyalgia protocol articles here on this website. The idea is to build a stronger core and immune status. After we have created a support system for the immune and nervous system involvement, we can begin to incorporate an exercise program best suited for fibromyalgia chronic fatigue syndrome.
“Everyone can dance! Just embrace your style! And, if it’s for fitness, well, the point is to get you moving, not to be a professional! So, if you’re sweating and having a good time, you’re doing it right!” says Blogilates creator Cassey Ho. In this video, she takes you through a step-by-step, 14-minute dance cardio workout, complete with instructions. This video is great for those who need a bit of extra guidance. After you’ve learned the exercises, you may even be able to take a few of these moves to the floor.

Exercise and physical activity fall into four basic categories—endurance, strength, balance, and flexibility. Most people tend to focus on one activity or type of exercise and think they’re doing enough. Each type is different, though. Doing them all will give you more benefits. Mixing it up also helps to reduce boredom and cut your risk of injury.
Physical activity is beneficial for young people, who are naturally primed to soak up its rewards. The reality is that the majority of today’s youths, however, fall into one of two camps: Either they are athletes, engaging in one or many sports (as well as auxiliary training such as weightlifting and agility work, which can help create lifelong fitness habits) or they are sedentary.
^ Jump up to: a b c Rosenbaum S, Tiedemann A, Sherrington C, Curtis J, Ward PB (2014). "Physical activity interventions for people with mental illness: a systematic review and meta-analysis". J Clin Psychiatry. 75 (9): 964–974. doi:10.4088/JCP.13r08765. PMID 24813261. This systematic review and meta-analysis found that physical activity reduced depressive symptoms among people with a psychiatric illness. The current meta-analysis differs from previous studies, as it included participants with depressive symptoms with a variety of psychiatric diagnoses (except dysthymia and eating disorders). ... This review provides strong evidence for the antidepressant effect of physical activity; however, the optimal exercise modality, volume, and intensity remain to be determined. ...
Okay, this one if for the kids, but grown-ups can do it to too. With animated instructions, catchy music, and all the basics of the other full-body workouts, this is another top choice overall. The exercises include some more advanced moves, like tricep dips with a chair and push-ups with rotation, so it’s a great one to do with your kids.                                    

This is a lift that builds full-body power and tests the ability to move quickly. HOW TO DO IT: Start with the bar on the ground. Place your hands on the bar -- a little outside of your shins -- with the bar touching your mid shin. You should keep your weight on your heels with your chest big and pull the bar up like a deadlift, while driving the knees back so that the bar path stays perpendicular to the floor and you stay over the bar. This utilizes your hip hinge and activates your posterior chain. Once the bar passes the knees, you jump up (you may not actually leave the ground, but you should feel like you’re trying to) and shrug so that the bar comes as high as possible. The next step is for you to get under the bar or “catch” it as quickly as possible by squatting under the bar and changing the hand position underneath the bar, putting the body into a front squat position with the bar resting on the shoulders. You then stand the bar up. MUSCLES USED: Glutes, quads, hamstring, calves, shoulders, core and traps.
Indian yoga gurus started arriving to the West at the turn of the 20th century, however, yoga as it is known today only evolved as a popular method to ‘stay healthy and relaxed’ during the second half of the century.50 Syman S. The subtle body: the story of yoga in America. New York (NY): Farrar, Straus & Giroux; 2010. [Google Scholar] There was no contact found between the sporadic early yoga arrivals to the West and the MMB pioneers discussed within this research. However, Eastern mind–body practices profoundly influenced Randell and Morris, most probably via Vaughan, who had just returned from years of obstetric work and eye-opening behavioral observations in India prior to the inception of the St Thomas project in 1912.

Frequency, intensity, type, location and social setting (alone vs. together with others) of exercise were assessed using exercise logs from 618 older adults (aged 70–77 years) randomized to MCT or HIIT. All participants completed exercise logs after each exercise session they performed during one year. Pearson Chi-square tests were run to assess the association between intensity, type, location and social setting of exercise with training group.

Whether you are a newbie CrossFitter or a seasoned veteran, there are foundational movements that everyone should master prior to completing a WOD (Workout of the Day). On the next slides, we’ll show 16 essential CrossFit moves that you need to know. These moves are proven to increase your strength, build your lung capacity and make you the best athlete you can be. Proper form is essential to avoid injury.

In 1890, English-born American physician Edwin Checkley published ‘A Natural Method of Physical Training’ in which he presented his MMB philosophy. Checkley’s exercise method was non-competitive, did not encourage physical or mental exhaustion, and did not require equipment. The aim was ‘to feel naturally light and strong and to have an effective body.’9 Checkley E. A natural method of physical training. New York (NY): William C. Bryant & Co.; 1890. [Google Scholar] Checkley expressed his dismay toward the vigorous and ‘unnatural’ athletic training methods utilized in the gymnasiums at the time, as well as toward the new mechanized ‘muscle-molding schemes’ he referred to as ‘straining’ more than ‘training.’ He criticized the ethics of aggressive performance-enhancing gymnastic and athletic training techniques claiming they were not natural, therefore harmful for the body and mind. In comparison, Checkley described animals in nature that sustain a lifetime of health, fitness, and beauty by performing seemingly effortless movements on a regular basis.9 Checkley E. A natural method of physical training. New York (NY): William C. Bryant & Co.; 1890. [Google Scholar] Perhaps ironically, Checkley’s philosophy and exercises famously ‘converted’ Alan Calvert, the weightlifting pioneer who founded the Milo Bar-bell Company in 1902 and started Strength Magazine in 1914 (Figures 1, 2).12 Beckwith KA. Building Strength. Alan Calvert, the Milo bar-bell company, and the modernization of American weight training; PhD thesis. Austin: The University of Texas; 2006. [Google Scholar]

Aerobic exercise induces mitochondrial biogenesis and an increased capacity for oxidative phosphorylation in the mitochondria of skeletal muscle, which is one mechanism by which aerobic exercise enhances submaximal endurance performance.[98] [92][99] These effects occur via an exercise-induced increase in the intracellular AMP:ATP ratio, thereby triggering the activation of AMP-activated protein kinase (AMPK) which subsequently phosphorylates peroxisome proliferator-activated receptor gamma coactivator-1α (PGC-1α), the master regulator of mitochondrial biogenesis.[92][99][100]
Children who participate in physical exercise experience greater loss of body fat and increased cardiovascular fitness.[23] Studies have shown that academic stress in youth increases the risk of cardiovascular disease in later years; however, these risks can be greatly decreased with regular physical exercise.[24] There is a dose-response relation between the amount of exercise performed from approximately 700–2000 kcal of energy expenditure per week and all-cause mortality and cardiovascular disease mortality in middle-aged and elderly populations. The greatest potential for reduced mortality is in the sedentary who become moderately active. Studies have shown that since heart disease is the leading cause of death in women, regular exercise in aging women leads to healthier cardiovascular profiles. Most beneficial effects of physical activity on cardiovascular disease mortality can be attained through moderate-intensity activity (40–60% of maximal oxygen uptake, depending on age). Persons who modify their behavior after myocardial infarction to include regular exercise have improved rates of survival. Persons who remain sedentary have the highest risk for all-cause and cardiovascular disease mortality.[25] According to the American Heart Association, exercise reduces the risk of cardiovascular diseases, including heart attack and stroke.[22]
^ Jump up to: a b c Cox EP, O'Dwyer N, Cook R, Vetter M, Cheng HL, Rooney K, O'Connor H (August 2016). "Relationship between physical activity and cognitive function in apparently healthy young to middle-aged adults: A systematic review". J. Sci. Med. Sport. 19 (8): 616–628. doi:10.1016/j.jsams.2015.09.003. PMID 26552574. A range of validated platforms assessed CF across three domains: executive function (12 studies), memory (four studies) and processing speed (seven studies). ... In studies of executive function, five found a significant ES in favour of higher PA, ranging from small to large. Although three of four studies in the memory domain reported a significant benefit of higher PA, there was only one significant ES, which favoured low PA. Only one study examining processing speed had a significant ES, favouring higher PA.
Georgi A. A biographical sketch of the Swedish poet and gymnasiarch, P.H. Ling. London: H. Bailliere; 1854.  Ling founded the Royal Gymnastic Central Institute in Stockholm in 1822, was an elected member of the Swedish General Medical Association, member of the Swedish Academy, and a Titular Professor. However, Ling remained indifferent to these honors due to the lack of the establishment’s implementation of his methods.7 Georgi A. A biographical sketch of the Swedish poet and gymnasiarch, P.H. Ling. London: H. Bailliere; 1854. [Google Scholar]
Bottom line. Strength training with heavy weights is a better way to target your glutes, but that’s not something most people will do. The program includes low- and high-impact routines, so you don’t need to be extremely fit to start. If you don’t mind doing lots of squats and lunges and you like the idea of dancing your way to fitness, this may be good for you. The Brazil Butt Lift eating plan includes basic recipes with easy variations.
Pilates is a fitness method that was developed by Joseph Pilates in Germany during World War I. Originally intended to help rehabilitate injured soldiers, Pilates broadened his method to help people of all walks of life, including police officers and dancers, to strengthen their bodies. His method stressed the use of the mind to control the muscles and was often used to help heal and build strength in individuals who were recovering from injuries.

Do you have any health or physical limitations to consider? If you have back problems, knee issues, arthritis, high blood pressure, asthma, or any kind of health or physical limitations, you need to consider these when looking at the array of exercise videos on the market. There are some that will push you to the very edges of your limits and others that can accommodate a necessity for lower impact and a slower pace yet are still effective. Ignoring health problems or physical limitations is very dangerous. Asking your doctor for any restrictions before shopping is a plus as well.
My Free Yoga is pretty much exactly as it sounds -- it offers free yoga classes for you to enjoy! It is a little different than other yoga options on this list in that it is really a hub for yoga instructors to post their free yoga class videos. The video library is huge and you can search for classes that focus on your specific problem areas. For example, there is a category for those suffering from hip issues and another for those experiencing back pain.
As a "formerly advanced" climber who is trying to get back into a healthy regimen after a year or two off, this book was excellent review of some obvious components of active practice that I'd forgotten in my rush to get back to my old level of climbing. Horst continues to be the best when it comes to training guides. Cannot recommend this book (or any of the others) enough.
"Exercise is the magic pill," says Michael R. Bracko, EdD, FACSM, chairman of the American College of Sports Medicine's Consumer Information Committee. "Exercise can literally cure diseases like some forms of heart disease. Exercise has been implicated in helping people prevent or recover from some forms of cancer. Exercise helps people with arthritis. Exercise helps people prevent and reverse depression."
The barre method uses your own body weight for resistance and focuses on small, deliberate movements that focus on specific groups of muscles, specifically muscles that aren’t used in other workouts. Muscles are worked to the point of fatigue, and then stretched for relief. Proper form, body alignment and posture is stressed, which in turn leads to an overall strengthening of core muscles and the appearance of an aligned, lean body.
KE EMG RMS corresponds to the sum of EMG RMS of the following muscles: Vastus Lateralis, Rectus Femoris and Vastus Medialis. Isokinetic KE MVCs were performed at 60 (panel, A), 100 (panel B) and 140 (panel C) deg/s. Isokinetic KE MVCs were measured pre-exercise (pre, average of all three sessions pre-exercise values), shortly after exhaustion (13 ± 4 s after exhaustion), 20 s following exhaustion test (P20) and 40 s following exhaustion test (P40). Data are presented as mean (SE).
As a "formerly advanced" climber who is trying to get back into a healthy regimen after a year or two off, this book was excellent review of some obvious components of active practice that I'd forgotten in my rush to get back to my old level of climbing. Horst continues to be the best when it comes to training guides. Cannot recommend this book (or any of the others) enough.
Because CFS/ME is often related to viral issues or co-infections in the body, the immune system is "working overtime". CFS can actually be more debilitating than fibromyalgia, depending on the pain levels within fibro on any given day. This is simply due to the complex nature of CFS within the immune system. In fact, my preferred reference to this illness is not CFS but rather CFIDS or ME (Chronic Fatigue Immune Deficiency Syndrome OR Myalgic Encephalomyelitis)
The beneficial effect of exercise on the cardiovascular system is well documented. There is a direct correlation between physical inactivity and cardiovascular mortality, and physical inactivity is an independent risk factor for the development of coronary artery disease. Low levels of physical exercise increase the risk of cardiovascular diseases mortality.[22]
Environmental approaches appear promising: signs that encourage the use of stairs, as well as community campaigns, may increase exercise levels.[126] The city of Bogotá, Colombia, for example, blocks off 113 kilometers (70 mi) of roads on Sundays and holidays to make it easier for its citizens to get exercise. Such pedestrian zones are part of an effort to combat chronic diseases and to maintain a healthy BMI.[127][128]
My Free Yoga is pretty much exactly as it sounds -- it offers free yoga classes for you to enjoy! It is a little different than other yoga options on this list in that it is really a hub for yoga instructors to post their free yoga class videos. The video library is huge and you can search for classes that focus on your specific problem areas. For example, there is a category for those suffering from hip issues and another for those experiencing back pain.
I found pound at Crunch Fitness when I lived in LA. You had to sign up for the class ahead of time and they would run out of sticks because the classes were so packed (so I ended up buying my own to bring). The live classes were much more fun than the videos, I think because of the music. At the gym, the instructors would play fun current or popular hit songs really loud. In the videos, it’s more focused on instruction than the music, even though they have options for music only –see below.
My favorites are all free, though you can subscribe for more features to most of them as well. But free works just fine. They’re all available on iOS and Android (except for one). They’re all built around the science-based concept of high-intensity circuit training using body weight, so you don’t need any fancy equipment. I’ve done these in hotel rooms, my office, parks, and even in a quiet corner at the airport waiting to get on a plane.
Squat Jacks are a surefire way to tone your legs and butt ,as well as your inner and outer thighs and provide a serious cardio blast and calorie burn in just 30 seconds. Marks says to do the following: Begin in a squat position, with your feet slightly wider than hip-width and place your hands behind your head, elbows wide. Keeping your core engaged, jump your feet in together, while maintaining a squat position. Quickly jump your feet back wide to the starting position. Be sure to keep your knees behind your toes the entire time.

Investigations were identified by PubMed, Ovid, the Cochrane Central Register of Controlled Trials, Cochrane Database of Systematic Reviews, American College of Physicians Journal Club, and Database of Abstracts of Reviews of Effects. The search terms included shoulder, impingement, rotator cuff, rehabilitation, physical therapy, physiotherapy, and exercise. Additional searches were performed with bibliographies of retrieved studies.

Yoga, which when translated from Sanskrit means “to control” or “to unite,” is said to have originated in India thousands of years ago. While its origins are based upon religion, many yoga classes today focus more on the connection between mind, body and spirit and achieving a balance within the body. Yoga concentrates heavily on body awareness, breathing and stretching.

Torque signal and knee angle signal were recorded using the same dynamometer as for the OLDE (Cybex NORM isokinetic dynamometer, CMSi, Computer Sports Medicine Inc., Stoughton, USA). During the tests a two shoulder harnesses and a belt across the abdomen limited extraneous movement of the upper body. Torque signal and knee angle signal were digitized on-line at a sampling frequency of 1 kHz using a computer, and stored for analysis with commercially available software. Torque signal was filtered prior to data analysis (Butterworth low-pass filter at 100 Hz). Torque signal, knee angle signal and EMG signal were recorded with the same device (MP150, Biopac Systems Inc., Goleta, USA) and analyzed with the same commercially available software (Acqknowledge 4.2 for MP Systems, Biopac Systems Inc., Goleta, USA).
'Time exposed' to training, in both the intervention and control arms of the study, was defined as the length of time an individual spent in training with his or her original training group free of AKP. Patients were thus censored at the point they were removed from training (various time-points through the 14-week training period). Participants who successfully completed training with their original troop were censored at the point of exit (14 weeks). There was no follow-up after the 14-week point.

This is a two-fold explanation: 1) how long it takes to train per session and 2) how frequently we recommend training. We believe – and basic muscle physiology principles state – that the best way to stimulate a muscle is by short, intense bouts of exercise. Not in long, drawn-out workouts, which simply can’t be as intense. Ideally, a resistance training workout should only last 20 to 30 minutes. Longer workouts are typically less intense and can release catabolic hormones (which we don’t want). When it comes to exercise, “more” is not necessarily “better.” Working out is merely a method of stimulating your results. Your actual gains or improvements occur when your body “recovers” from the exercise. If you exercise before your muscles are completely recovered from a bout of exercise, you’re just … beating a dead horse. You need to find the right “dose” of exercise for you. Too little exercise limits your progress, but too much or too frequent exercise doesn’t allow your body to recover properly and may hinder your progress as well. The ideal frequency of your training may change over time based on things like your specific genetics or how intensely you train. Our clients typically train only once or twice per week, with only a handful ever training more frequently than that. The best way to know how frequently you should train is through very detailed and accurate record keeping. Your personal trainer at SMX will always monitor your training. Once a fair amount of data is compiled by your trainer, we can dial in and fine-tune how frequently and what intensities are ideal for you to maximize your results.

Jump up ^ Lees C, Hopkins J (2013). "Effect of aerobic exercise on cognition, academic achievement, and psychosocial function in children: a systematic review of randomized control trials". Prev Chronic Dis. 10: E174. doi:10.5888/pcd10.130010. PMC 3809922. PMID 24157077. This omission is relevant, given the evidence that aerobic-based physical activity generates structural changes in the brain, such as neurogenesis, angiogenesis, increased hippocampal volume, and connectivity (12,13). In children, a positive relationship between aerobic fitness, hippocampal volume, and memory has been found (12,13). ... Mental health outcomes included reduced depression and increased self-esteem, although no change was found in anxiety levels (18). ... This systematic review of the literature found that [aerobic physical activity (APA)] is positively associated with cognition, academic achievement, behavior, and psychosocial functioning outcomes. Importantly, Shephard also showed that curriculum time reassigned to APA still results in a measurable, albeit small, improvement in academic performance (24).  ... The actual aerobic-based activity does not appear to be a major factor; interventions used many different types of APA and found similar associations. In positive association studies, intensity of the aerobic activity was moderate to vigorous. The amount of time spent in APA varied significantly between studies; however, even as little as 45 minutes per week appeared to have a benefit.
Individual and group time to exhaustion duration are presented Table 2. Time to exhaustion duration ranged from 3.94 to 9.44 min (S1: 6.07 ± 1.71 min, S2: 5.59 ± 0.99 min, S3: 6.23 ± 1.68 min) and did not differ between sessions (P = 0.156). Individual and group CV are presented in Table 2. The ICC was 0.795 (0.493, 0.950). The typical error of measurement was 0.30 min and the smallest worthwhile change was 0.28 min. Bland-Altman plots for raw and log transformed data are presented in Fig 3. LOA was equal to 15.59.

One way repeated ANOVAs (time: isotime from first to seventh minute and exhaustion) were used to test the time course of EMG RMS for all muscles, leg RPE, leg muscle pain and heart rate. Significant effect of time was explored with planned comparison (1st minute vs other time points, exhaustion vs other time points) adjusted with Holm-Bonferonni correction.

One of the rotator cuff strengthening exercises proposed by Kuhn is scaption performed with the thumb down or up. Clinically, this exercise is called the empty-can (thumb-down) or full-can (thumb-up) exercise. When prescribing this strengthening exercise, one should consider the effect that upper extremity position has on the tissues located in the subacromial space. Yanai et al4 showed that impingement forces on the rotator cuff tendons under the coracoacromial ligament were greater with the empty-can exercise than with the full-can exercise. Therefore, the full-can exercise is more appropriate for this patient population.
Workouts are an extremely efficient experience for our clients. You will be in and out in less than 30 minutes. You will come in no more than twice per week. Don't worry, that's all the time we need to target all major muscle groups and the cardiovascular system. Our instructors set up the equipment, keep detailed notes, and guide our clients through every step of the workout.

One way repeated ANOVA was used to compare time to exhaustion between sessions (S1, S2 and S3). Relative reliability was calculated with the intraclass correlation (ICC) model (3, 1) [27]. Absolute reliability was calculated with the typical error of measurement (the standard deviation of the change scores divided by  [28, 29]). Bland and Altman’s 95% limits of agreement were also used (calculated for S1 vs S2, S1 vs S3 and S2 vs S3) as an additional representation of measurement error and to identify the presence of heteroscedasticity [19]. As data were heteroscedastic, both raw data and log transformed Bland and Altman’s plots are presented. Limit of agreement ratio (LOA) was also calculated from the log transformed data as follow: LOA = (1.96 × SDdiff / grand mean) × 100; where “SDdiff” represents the SD of the differences between tests (S1 vs S2, S1 vs S3, S2 vs S3) and “grand mean” represents (mean S1 + mean S2 + mean S3)/3. As time to exhaustion data were heteroscedastic, we also calculated the coefficient of variation (CV) for each subject as follow: CV = 100×(SD of the three measurements)/(mean of the three measurements). Mean CV for all subjects were also calculated. We also calculated the smallest worthwhile change (0.2 × between subjects SD) [21].

There are many ways to do a handstand push-up. One starts in the handstand position against a wall. HOW TO DO IT: To complete this movement, lower your body to the ground so that your head touches the ground (or mat) below. Then, push yourself away from the ground into a handstand. You can also kip this so that your lower body helps drive the upper body. This can be done by bringing your knees to your chest while you lower your head toward the ground. Then, kick up to the sky as you push off of the ground with your hands. The two forces combine to bring you back to the beginning handstand position. MUSCLES USED: Shoulders, core and triceps.
This exercise is similar in movement to the back squat; however, the bar sits in the front rack position across the collarbones and shoulders of the athlete. HOW TO DO IT: As you drive back up, it is imperative that you raise your elbows to the sky to keep the bar in the correct position. The core should be tight to prevent the back from rounding. If you have mobility issues in the front rack position, you can cross your forearms in front of your body, parallel to the ground. MUSCLES USED: Glutes, quads, hamstrings, calves and core.
^ Jump up to: a b Cooney GM, Dwan K, Greig CA, Lawlor DA, Rimer J, Waugh FR, McMurdo M, Mead GE (September 2013). "Exercise for depression". Cochrane Database Syst. Rev. 9 (9): CD004366. doi:10.1002/14651858.CD004366.pub6. PMID 24026850. Exercise is moderately more effective than a control intervention for reducing symptoms of depression, but analysis of methodologically robust trials only shows a smaller effect in favour of exercise. When compared to psychological or pharmacological therapies, exercise appears to be no more effective, though this conclusion is based on a few small trials.
Multiple component community-wide campaigns are frequently used in an attempt to increase a population's level of physical activity. A 2015 Cochrane review, however, did not find evidence supporting a benefit.[122] The quality of the underlying evidence was also poor.[122] However, there is some evidence that school-based interventions can increase activity levels and fitness in children.[15] Another Cochrane review found some evidence that certain types of exercise programmes, such as those involving gait, balance, co-ordination and functional tasks, can improve balance in older adults.[123] Following progressive resistance training, older adults also respond with improved physical function.[124] Survey of brief interventions promoting physical activity found that they are cost-effective, although there are variations between studies.[125]
Isokinetic KE MVCs were performed at 60 (panel, A), 100 (panel B) and 140 (panel C) deg/s. Isokinetic KE MVCs were measured pre-exercise (pre, average of all three sessions pre-exercise values), shortly after exhaustion (13 ± 4 s after exhaustion), 20 s following exhaustion test (P20) and 40 s following exhaustion test (P40). Data are presented as mean (SE). * significantly different from pre, $ significantly different from exhaustion and # significantly different from P20, 1 item for P < 0.05 and 3 items for P < 0.001.
Angular velocity of the pre and post isokinetic maximal voluntary contraction (MVC) of the knee extensors (KE) tests were randomized between sessions (60-100-140 deg/s, 100-140-60 deg/s or 140-60-100 deg/s). One isometric MVC of the knee flexors was also performed pre and post exercise, 20 s following completion of the last KE MVC. Post tests were performed either shortly after exhaustion (13 ± 4 s), 20 s following exhaustion (P20) or 40 s following exhaustion (P40).
* Exercise isn't supposed to be fun or enjoyable (that's what recreation is for). Exercise is a means-to-an-end. It shouldn't be something you look forward to, nor should you dread doing it; it should just be part of your lifestyle... like eating or sleeping. If you DO look forward to it, and even crave it, you could be hooked on the endorphin rush you get from doing an activity that is considered by the body to be over-doing it. And since the body would rather you not do this, it would be prudent to respect the body's wishes.