Handstand Push-Up: These are a basic movement for gymnasts— but a real challenge (and an awesome bar trick) for most regular folks. In most CrossFit workouts, athletes can kick up to a wall for stability while they perform this movement. Just remember these don’t count unless the head touches the ground at the bottom and arms are fully locked at the top.
A systematic review evaluated 45 studies that examined the relationship between physical activity and cancer survivorship. According to the review, "[there] was consistent evidence from 27 observational studies that physical activity is associated with reduced all-cause, breast cancer–specific, and colon cancer–specific mortality. There is currently insufficient evidence regarding the association between physical activity and mortality for survivors of other cancers." Although there is only limited scientific evidence on the subject, people with cancer cachexia are encouraged to engage in physical exercise. Due to various factors, some individuals with cancer cachexia have a limited capacity for physical exercise. Compliance with prescribed exercise is low in individuals with cachexia and clinical trials of exercise in this population often suffer from high drop-out rates.
A number of medical reviews have indicated that exercise has a marked and persistent antidepressant effect in humans, an effect believed to be mediated through enhanced BDNF signaling in the brain. Several systematic reviews have analyzed the potential for physical exercise in the treatment of depressive disorders. The 2013 Cochrane Collaboration review on physical exercise for depression noted that, based upon limited evidence, it is more effective than a control intervention and comparable to psychological or antidepressant drug therapies. Three subsequent 2014 systematic reviews that included the Cochrane review in their analysis concluded with similar findings: one indicated that physical exercise is effective as an adjunct treatment (i.e., treatments that are used together) with antidepressant medication; the other two indicated that physical exercise has marked antidepressant effects and recommended the inclusion of physical activity as an adjunct treatment for mild–moderate depression and mental illness in general. One systematic review noted that yoga may be effective in alleviating symptoms of prenatal depression. Another review asserted that evidence from clinical trials supports the efficacy of physical exercise as a treatment for depression over a 2–4 month period.
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.
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).
In addition to determining the optimal position from which to initiate an exercise based on the patient's related impairments and level of pain, exercise dosage and progression are important aspects of a rehabilitation program. Intervention details, such as number of repetitions and sets, exercise order, and work-to-rest ratios, should be tailored to each patient based on his or her specific needs. The proposed protocol does not describe a method to determine the initial exercise intensity or the criteria for modification or progression. Using a criterion-based method to determine the initial intensity and progression would individualize these guidelines of the exercise program. In their randomized controlled trial designed to address the effectiveness of exercises to treat RCIS, Lombardi et al6 used a 6-repetition maximum load to establish the starting intensity of strengthening exercises. They6 also recommended a reevaluation every 2 weeks to make necessary adjustments to exercise intensity. Although we do not know whether the 6-repetition maximum-load criteria used in their study is optimal, it is an excellent example of a criterion-based method to determine initial exercise intensity and progression. Future research on exercise for the treatment of RCIS should include criterion-based methods to determine the optimal exercise dosage and progression.
An early detailed documentation of a Western mind–body exercise philosophy was created in the late 18th century by Swedish medical gymnastics teacher Pehr Henrik Ling (1766–1839), who is remembered as the father of Swedish Gymnastics. Ling developed an apparatus-free method to improve functional movement and concurrently address the concept of prevention and healing of human diseases.4 Bakewell S. Illustrations from the Wellcome Institute Library: Medical gymnastics and the Cyriax collection. Med Hist. 1997;41:487–95.10.1017/S0025727300063067[Crossref], [PubMed], [Web of Science ®] [Google Scholar] His early age rheumatism, experiences as a Fencing Master and his studies of medicine at Uppsala University influenced his ideas on the remedial benefits of physical training.5 Brodin H. Per Henrik Ling and his impact on gymnastics. Sven Med Tidskr. 2008;12(1):61–8.[PubMed] [Google Scholar] His 1853 book ‘Gymnastic Free Exercises’ stated: ‘It cannot be denied that the art of preventing disease is far preferable to that of curing it.’6 Ling PH. The gymnastic free exercises. Boston (MA): Ticknor, Reed and Fields; 1853. [Google Scholar] Ling regarded his ‘gymnastic free exercises’ as one of two separate yet related systems; the other being competitive gymnastics and athletics. Together, these two systems defined what became the Physical Culture or Gymnasium Movement of the 19th century.5,7 Brodin H. Per Henrik Ling and his impact on gymnastics. Sven Med Tidskr. 2008;12(1):61–8.
14. If you don't feel like working out, don't! Listen to your body. Just because it's your "scheduled day" doesn't mean you must work out. If your body is taking a little longer to recover than usual, so be it. It won't hurt you to lay off for an additional day or two; you will not lose anything you've gained. If your body isn't ready, it's better to skip days than to work out anyway. Every seven days is only a target (some people have found every eight or nine days reap the same benefits).
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. The quality of the underlying evidence was also poor. However, there is some evidence that school-based interventions can increase activity levels and fitness in children. 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. Following progressive resistance training, older adults also respond with improved physical function. Survey of brief interventions promoting physical activity found that they are cost-effective, although there are variations between studies.
Rock climbing is one of the most physically challenging sports, testing strength, endurance, flexibility, and stamina. Good climbers have to build and maintain each of these assets. This is revised and updated edition of the classic book, Conditioning for Climbers, provides climbers of all ages and experience with the knowledge and tools to design and follow a comprehensive, personalized exercise program.
You acquire 100 new shares, giving you a total of 160. You simultaneously sell 50 shares of the exercised options to pay the total exercise cost ($2,000 ÷ $40 = 50 shares), leaving you with 110. Additional shares must be sold to pay for broker fees and, if exercising NQSOs, withholding taxes. After the exercise, you might own less than the 110 shares.
Often, when you watch someone lifting weights in a gym, you’ll notice they’re essentially “throwing” the weights up and “dropping” the weights down more than actually “lifting” or “lowering” the weights. They’re allowing certain aspects of physics (momentum, inertia, and gravity) to do much of the work for them instead of truly engaging, and therefore stimulating their muscles. Unfortunately their “perceived” goal is to make the weight move, but the real goal in weight training isn’t just moving the weight; the goal is to fatigue and challenge the targeted muscles. Depending on the specific exercise and range of movement involved, we instruct our clients to take approximately 10 seconds to lift the weight and another 5-10 seconds to lower the weight. By moving slowly, you’re not allowing inertia to carry the weight up or using gravity to let the weight crash down during the lowering phase of the movement. This enhanced and more complete muscle fiber stimulation ensures that you’re not simply “spinning your wheels.” This high-quality exercise stimulus will lead to greater results far quicker than more traditional lifting methods.
Before anyone’s crowned Cap’n Crunch, remember form is key. Lie on your back with the knees bent and feet flat on the floor. With hands behind the head, place the chin down slightly and peel the head and shoulders off the mat while engaging the core. Continue curling up until the upper back is off the mat. Hold briefly, then lower the torso back toward the mat slowly.
For Ready-Made or Make Your Own Workouts: Fitness Builder (iPhone or iPad)- This is one of my favorite exercise apps, offering a variety of ways to exercise. You can choose workouts based on the equipment you have, the muscle groups you want to work or the type of workout you're looking for. There are a range of ready-made workouts and you can also create your own workouts from the amazing database of exercises included.
Tracy Anderson: The Method For Beginners. Choose from a handful of workout DVDs from this celebrity trainer. She’ll have you working up a sweat doing cardio or more targeted moves for the arms, legs, and core. Anderson’s queue of videos range from about $2.99 to $9.99. Considering that Anderson has her own collection of studios across the globe that run about $45 per class, this is a steal!
To measure exercise type the participants were instructed to choose from the following response options: walking, jogging, cycling, dancing, cross-country skiing, swimming, golf, resistance training and an open-ended response option. Answers in the open-ended response option were categorized into: combined endurance and resistance training, other type of endurance training (e.g. treadmill, aerobic), domestic activities (e.g. housework, gardening), and other (e.g. bowling, horseback riding). Golf was categorized as “other” due to a low response rate (0.5% of the total number of exercise sessions).
The popular belief is that two training methods are needed to be physically fit: working with weight for muscle strength, and aerobics for cardiovascular fitness. This is untrue. One of the biggest jobs of the cardiopulmonary system (heart and lungs) is to service the muscles. If the cardiopulmonary system were a retail store, the muscular system would be its biggest customer. When your muscular system works harder, the cardiopulmonary system works harder; it's not the other way around. So, working your muscles hard will force the cardiopulmonary system to work hard. Muscular work of sufficient intensity requires the cardiopulmonary system to work hard to meet muscular demands, so one activity takes care of both muscular and cardiopulmonary fitness. And that activity is strength training. Think about it, you can't exercise the cardiopulmonary system without exercising the muscular system! So, although the fitness industry remains blind to the above facts, strength training will provide you with every exercise-related health benefit you could possibly want. Doing "cardio work" is a waste of time and physiological resources, and can actually be counterproductive.
All six MMB pioneers expected near magical effects from the regular non-exhausting practice of their exercise regimes. This promised a lifetime of optimal health, beauty, and strength for the body and mind. Further, expected benefits include improved quality and efficacy of daily activities, looking and feeling good, making life itself easier and more pleasurable with a disappearance or reduction of symptoms while improving postures. This leads to increased self-esteem, reduced health costs, and the expectation of a longer and high-quality life. It is interesting to note that all six MMB pioneers enjoyed long and fruitful lives that reflect this philosophical model within real life examples: Checkley died in 1925 at 78; Müller in 1938 at 72; Alexander in 1955 at 86; Randell in 1974 at 99; Pilates in 1967 at 87; and Morris in 1980 at 89.
A typical yoga class involves different types of breathing and stretching exercises. You will need a yoga mat on which you will spend the majority of your workout. A series of warm up exercises involving breathing and stretching usually begins the class. From there, you will engage in a variety of yoga positions designed to stretch and work your muscles. This involves holding your body in challenging poses designed to work a variety of muscle groups at the same time. A cool-down period with breathing exercises will end your session.
DC-based personal trainer Chris Perrin says to do hip bridges if you want to get your derriere round and toned. “Lie on the floor. With bent legs, place both feet flat on the floor. Both arms down, hands on each side of your hips,” he explains. “Raise your low back off the floor by pushing through the heels of the feet. Once your hips are at their highest point—without straining your back—pause and return your lower back to the floor.” And squeeze those glutes the entire time!
Cardio-wise, there's no need to completely abandon what you love. Just tweak it. "At least one day a week, do a different activity than usual," Dixon advises. "If you're a walker, hit the pool. If you're a cyclist, get to know the rowing machine." Increase intensity during your second cardio workout of the week, and up your workout time during the third session. "Those three changes will keep your body guessing," she says.
Video Abstract for the ESSR 46.2 article “Potential Role of MicroRNA in the Anabolic Capacity of Skeletal Muscle With Aging” from author Donato Rivas. Age-induced loss of skeletal muscle mass and function, termed sarcopenia, may be the result of diminished response to anabolic stimulation. This review will explore the hypothesis that alterations in the expression of microRNA with aging contributes to reduced muscle plasticity resulting in impaired skeletal muscle adaptations to exercise-induced anabolic stimulation.
Around 1900, Tasmanian-born Australian professional reciter and theatrical producer Frederick Alexander developed a novel methodology to harmonize full-body functional movements. As a child, Alexander suffered respiratory ailments, leading to the initial purpose of developing the method – to normalize his personal voice function in order to materialize a stage performance dream. In 1902, Alexander established the Sydney Dramatic and Operatic Conservatorium and in 1904, moved to London to spread his teaching method. During the first years, Alexander focused on teaching ‘full chest breathing’ techniques mainly to stage artists and people with breathing pathologies.19 Staring J. Frederick Matthias Alexander 1869-1955. The Origins and History of the Alexander Technique. A medical historical analysis of F.M. Alexander’s life, work, technique, and writings. Nijmegen: Radboud Universiteit; 2005. [Google Scholar] However, he soon discovered that retrieving the natural ‘conscious control’ via mindful postures and movements resulted in benefits not only for the vocal health and performance but also the health and performance of the whole body and mind.20 Alexander FM. Man's supreme inheritance. London: Methuen; 1910. [Google Scholar] This holistic evolvement transformed the newly formed ‘Alexander Technique’ into a general remedy and preventative tool suitable for all populations. Alexander explained in his 1910 book ‘Man’s Supreme Inheritance:’20 Alexander FM. Man's supreme inheritance. London: Methuen; 1910. [Google Scholar]
Stand with feet shoulder-width apart. Lift right leg straight back and up; at same time, hinge at waist and bring hands or fingertips to floor in front of left foot. Bend both knees, bringing right knee behind left knee. Press back up through left foot to return to previous position. Do 15 reps, keeping leg raised, then switch sides and repeat. Do 3 sets.
... The test was conducted at a self-chosen cadence between 55 and 95 revolutions per minute with an initial 5-minute warm up at 40 W followed by increments of 10 W/min (women) or 15 W/min (men) until voluntary exhaustion. Based on the expected maximal power output determined based on age, gender, disability, and body size, individual power output adjustments were made immediately after the 5-minute warm up in order to exhaust the subjects within 8 to 12 min after warm up . Expired gas was collected in a mixing bag. ...
Chase Squires is the first to admit that he's no fitness expert. But he is a guy who used to weigh 205 pounds, more than was healthy for his 5'4" frame. "In my vacation pictures in 2002, I looked like the Stay Puft Marshmallow Man at the beach," says the 42-year-old Colorado resident. Squires decided enough was enough, cut out fatty food, and started walking on a treadmill. The pounds came off and soon he was running marathons -- not fast, but in the race. He ran his first 50-mile race in October 2003 and completed his first 100-miler a year later. Since then, he's completed several 100-mile, 50-mile, and 50k races.
When you upgrade to the paid version, you can also track your weight and visualize your progress, which might help you stay motivated. It also shows a calendar of all of your workouts and lets you see them at a glance. I’ve had this app for three years now and they do a great job of updating it regularly to add new exercises and respond to user requests.
I recommend the Swanson Enhanced Pqq with Ubiquinol CoQ10 for a good and yet cost effective quality. Another high quality brand is Life Extension at a higher cost usually. These are the two brands we have used and I do believe Swanson is the best in quality and cost, however, if you are already using Co-Q10 Ubiquinol in another brand, that is great, continue doing what works.
The question used to assess location of exercise had the following response options: home, outdoor in nearby area, nature, gym, indoor- and outdoor sports facility. Indoor- and outdoor sports facility was categorized as “sports facility” due to a low response rate on the outdoor sports facility option (1%). For social setting of exercise, the response options were: exercised alone, exercised together with others, and organized by Generation 100.
Your heart rate refers to how many beats per minute (BPM) your heart is pumping, and when it comes to working out, knowing your heart rate can help determine if you’re working at the right intensity. You have your resting heart rate, which is how fast your heart is beating when you’re doing nothing (the best way to measure this is to take your pulse first thing in the morning). Generally speaking, this gets lower as you get more fit because your heart doesn’t have to work as hard to pump out blood (although if you have a naturally low resting heart rate thanks to genetics, it may not get much lower, and that’s totally fine, says Lefkowith). According to the American Heart Association, the average is 60-100 BPM. You also have your maximum heart rate, which is the hardest your heart can work efficiently.
The EMG signals were filtered with a Butterworth band pass filter (cutoff frequencies 20 and 400 Hz). Then, the root mean square (RMS) of the EMG signal was automatically calculated with the software. During the incremental test, the EMG RMS was averaged for the last 5 EMG bursts of each step (at the end of each minute) and at exhaustion. During the time to exhaustion tests, the EMG RMS was averaged for the last 5 EMG bursts prior each time point measurement (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100% of the time to exhaustion). EMG RMS of each muscle during the time to exhaustion tests was normalized by the maximal EMG RMS of the respective muscle obtained during the pre-exercise KE MVC performed at 100 deg/s. During the KE MVCs, maximal EMG RMS was averaged over a range of 20 deg extension (± 10 deg) around the peak torque.
Anaerobic exercise differs from aerobic exercise in that it is comprised by short bursts of a high-intensity activity such as that repeated during strength training. While aerobic exercise uses oxygen for fuel (an early definition of aerobic is, after all, "living only in the presence of oxygen"), anaerobic exercise draws its fuel from carbohydrates. Anaerobic exercise also produces lactic acid, unlike aerobic exercise. To get started with some anaerobic exercises, check out this list of anaerobic exercises you can do anywhere. While anaerobic exercise does not burn as many calories as aerobic exercise burns, it will still help to improve respiratory and cardiovascular fitness. Additionally, because anaerobic exercise depletes energy more quickly than the blood can replenish the muscles' oxygen, the body's anaerobic metabolism kicks in, burning glucose as fuel. Even after the the anaerobic activity has stopped, the metabolism remains increased for up to several hours. If anaerobic exercise is repeated often, it will even have an effect on your resting metabolic rate. This will cause your body to burn more calories in general—even when you're sleeping.
SOURCES: Liz Neporent, video creator; president, Wellness 360 corporate wellness consulting firm, New York. Wendy Glenna, American Council on Exercise-certified fitness instructor; physical education teacher; fitness video reviewer, Collage Video, Minneapolis, Minn. Paula Zurowski, ACE-certified personal trainer; fitness video reviewer, Richmond, Calif.
Hessel J [Internet]. Joseph H. Pilates biography. 2015 Jul 8 [cited 2015 Aug 30]. Available from: http://www.jillianhessel.com/pilates_biography.html. He claimed that ‘sports are wonderful … but of little value for correcting whats wrong with you … corrective exercise is the only way to build a beautiful, strong, youthful body.’44 Readers Digest [Internet]. Ray MB. Cutting a fine figure (1934). 2012 Dec 13 [cited 2015 Aug 30]. Available from: http://www.isofit.com.hk/assets/files/193410_Readers_Digest_Joe_Pilates_Interview.pdf. [Google Scholar] He explained in his 1939 book ‘Your Health’: ‘Practically all human ailments are directly traceable to wrong habits which can only be corrected through the immediate adoption of right (natural, normal) habits’ … ‘the present day efforts of our so-called health departments are in vain so far as physical health is concerned’ … ‘this condition will prevail until such time as marks the recognition of a standard formation of sound and sane physical culture, based upon the natural laws of life.’45 Pilates J. Your health. Nevada: Presentation Dynamics; 1934. [Google Scholar] In his 1945 book ‘Return to Life Through Contrology,’ Pilates clearly supported Checkley, Müller, and Alexander stating that ‘Contrology is not a system of haphazard exercises designed to produce only bulging muscles’ … ‘Rather, it was conceived to limber and stretch muscles and ligaments so that your body will be as supple as that of a cat and not muscular like the body of a brewery-truck horse.’46 Pilates J, Miller WJ. Return to life through Contrology. Nevada: Presentation Dynamics; 1945. [Google Scholar] In this book, Pilates presented a list of 34 full-body equipment-free exercises, which if performed regularly at home, were promised to ‘give you suppleness, natural grace, and skill that will be unmistakably reflected in the way you walk, in the way you play, and in the way you work’ … ‘You will find your body development approaching the ideal, accompanied by renewed mental vigor and spiritual enhancement’. Pilates famously stated: ‘Physical fitness is the first requisite of happiness.’46 Pilates J, Miller WJ. Return to life through Contrology. Nevada: Presentation Dynamics; 1945. [Google Scholar] As with Müller,15 Müller JP. My system. London: Link House; 1904. [Google Scholar] Randell,25,26 Randell M. Training for childbirth from a mother's point of view. 4th ed. London: J. & A. Churchill Ltd.; 1949.
One of the most recognized MMB pioneers was Joseph Hubertus Pilates, born near Dusseldorf in Germany to a prize-winning gymnastics father and naturopath mother. According to Pilates historians’, he was a bullied child who suffered asthma and a weak body that he overcame as a teenager by learning anatomy from medical books and the practice of sports such as wrestling and gymnastics. During this process, he developed a model body, which was even displayed in anatomy classes.39,40 Balanced Body, Inc. [Internet]. Origins of Pilates. 2015 Aug 30 [cited 2015 Aug 30]. Available from: https://www.pilates.com/BBAPP/V/pilates/origins-of-pilates.html.
The European Commission - DG EAC - Directorate General for Education and Culture - has dedicated programs and funds for HEPA - Health Enhancing Physical Activity projects within its Horizon 2020 and Erasmus+ program, as research showed that too many Europeans are not physically active enough. Financing is available for increased collaboration between players active in this field across the EU and around the world, the promotion of HEPA in the EU and its partner countries and the European Sports Week. The DG EAC regularly publishes a Eurobarometer on sport and physical activity.
Exercising stock options should not be a passive event that happens after a given amount of time. It's rather like playing a hand of cards: if your plays are strategic, you'll probably "know when to hold them and when to fold them." Many alternatives and trade-offs need to be considered. But, as always, rules, requirements, and regulations govern this area, and this is where we begin.
"With CrossFit growing exponentially, you do get boxes that more closely resemble boutique studios -- think Brick or Solace in New York -- with amenities like fancy shower products, towel service, and coffee and/or smoothie bars," Ages says. "But you're just as likely to encounter one that has a single Trainspotting-style bathroom and a crumbling concrete floor."
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. 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. Moderate levels of exercise have been correlated with preventing aging by reducing inflammatory potential. The majority of the benefits from exercise are achieved with around 3500 metabolic equivalent (MET) minutes per week. 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. 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. Overall, physical inactivity causes 9% of premature mortality worldwide.
Calling all new moms! Whether you're looking to stay in shape during pregnancy, or get back into shape afterward, this workout is designed to give you a long, lean body. A blend of Pilates and barre moves, it follows the guidelines of the American College of Obstetricians and Gynecologists so that you can rest assured that you're exercising safely.
^ 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. ...
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.
3. Move v-e-r-y s-l-o-w-l-y but smoothly. "Explosive" movement is not only nonproductive, but also dangerous. Plus, moving slowly eliminates momentum, which ensures constant muscle loading. Make a movement last about ten seconds. (A chin-up should take about ten seconds from the lowest to the highest point, and then another ten seconds from the highest to the lowest point. Same goes for a push-up.) There is nothing to be gained from fast movements. Moving slowly prevents injury. (There are over 30 million exercise related injuries annually in this country; most of these can no doubt be attributed to high-force movement.) Keep your movements low-force and high-intensity. An analogy: If you attempt to lift your car quickly, you will likely injure yourself even if using proper form. If you try lifting it slowly and intensely, your chances of injury are nil. Think of how you drive your car over speed bumps... fast will cause damage to the car's suspension, slow will not.