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.
Jump up ^ Cunha GS, Ribeiro JL, Oliveira AR (June 2008). "[Levels of beta-endorphin in response to exercise and overtraining]". Arq Bras Endocrinol Metabol (in Portuguese). 52 (4): 589–598. PMID 18604371. Interestingly, some symptoms of OT are related to beta-endorphin (beta-end(1-31)) effects. Some of its effects, such as analgesia, increasing lactate tolerance, and exercise-induced euphoria, are important for training.

The only measures that accurately distinguished NFO from OTS were increases in ACTH and PRL concentrations after a second maximal exercise bout. The OTS athletes showed a very small or no increase in ACTH and PRL concentrations after the second exercise bout; the NFO athletes showed very large increases. This is a confirmation of our previous studies with this protocol.10 22 The use of two bouts of maximal exercise to study neuroendocrine variations showed an adapted exercise-induced increase of ACTH, PRL and GH to a twoexercise bout.10
Bonds H. The politics of the male body in global sport - the Danish involvement. Oxon: Routledge; 2010.  Müller, like Checkley, took a firm stand against exercise machinery, stating they were unnecessary and harmful with advocates described as having ‘biceps or triceps … as their chief credentials.’15 Müller JP. My system. London: Link House; 1904. [Google Scholar] After ‘My System’ was published, Müller traveled throughout Europe with lectures and exercise demonstrations and settled in London in 1912, to establish the ‘Müller Institute’ in which he offered group and individual classes to the public.15,16 Müller JP. My system. London: Link House; 1904.
Rotator cuff impingement syndrome (RCIS) is a multifactored disease that can lead to functional limitations and an inability to participate in work, leisure, and sporting activities. This syndrome can be caused by many factors, such as weakness of the rotator cuff and periscapular muscles, decreased pectoral and rotator cuff muscle flexibility, abnormal motion patterns, extrinsic factors (eg, vibration exposure, use of hand tools, work-station height), and trauma. Kuhn provided a valuable synopsis of randomized controlled clinical trials in which the benefit of exercise for individuals with RCIS was examined. Substantial evidence1 exists to support the use of exercise for the management of this patient population. In addition, manual therapy has been shown1 to augment the effectiveness of exercise. However, we believe it is premature to label the proposed rehabilitation protocol as a criterion standard because of the lack of specific exercise descriptions, variability in the exercise programs, and inability to separate the effects of specific exercises on the measured outcomes that Kuhn noted. Furthermore, because RCIS is multifactored, use of the same exercise protocol to treat everyone with RCIS might not be the best standard of care.
To qualify for inclusion, studies had to be level 1 or level 2 (randomized controlled trials); had to compare rehabilitation interventions, such as exercise or manual therapy, with other treatments or placebo; had to include validated outcome measures of pain, function, or disability; and had to be limited to individuals with diagnosed impingement syndrome. Impingement syndrome was determined by a positive impingement sign per Neer or Hawkins criteria, or both. Articles were excluded if they addressed other shoulder conditions (eg, calcific tendinosis, full-thickness rotator cuff tears, adhesive capsulitis, osteoarthritis), addressed postoperative management, were retrospective studies or case series, or used other outcome measures.
Exclusion criteria included major diseases or conditions such as severe heart disease, uncontrolled hypertension, obesity, osteoarticular pathology, and neurological disease. Criteria were evaluated on the basis of clinical history, resting ECG, and physical examination. Participants maintained their lifestyles and were instructed not to take part in any other physical programs throughout the study. At the time of the initial design, the study consisted of a 12-week randomized controlled trial with a frequency of 3 times a week, 36 sessions in all, ending with a new assessment of their wellness and the potential persistence of the results on functional/physical capacities.