PubMed · 4653111
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P J Rasch, F L Allman. Controversial exercises.. https://pubmed.ncbi.nlm.nih.gov/4653111/
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A new concept is presented for quantifying the variability of iterated human motions and other recurrent biological phenomena. The concept is based on the idea of interpreting the variations occurring in repeatedly executed stereotyped motions as particular realizations of a regular stochastic process with superimposed but infrequently occurring chaotic excursions. Under these premises, the extended transentropy of such a process turns out to be a dimensionless and appropriate quantifier of motion variability. Extended transentropy functions can be used to monitor variability changes during motion execution. The practical applicability and usefulness of the new method is demonstrated by means of an example from gymnastics (the kip on the horizontal bar). Major areas of future applications are expected to be gait analysis, all sports movements, and the objective evaluation of the success rates of certain medical treatment procedures for specific movement disorders.
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As therapy of ankylosing spondylarthritis still remains empirical, gymnastics and sports are of particular importance within the treatment of this disease. They aim at the improvement or at least the preservation of mobility, force and endurance. By those means an eventual immobilisation of the axial skeleton or the peripheral joints should take place in a position as favourable to function as possible. Various joint mobilisation techniques as well as muscle stretching are used to improve mobility. The latter thus pointedly prevents muscular disbalances. Various training methods are able to improve muscular performance. Slow dynamic force training can be used in gymnastic lessons as well as in home programmes. Maximal and staying power can thus be increased. Aerobic muscular training favours general efficiency, has a positive influence on risk factors of cardiac and vascular diseases and improves thoracic excursion. Motivation of the patient is correlated with the diversion of exercise, therapies and sport activities. The suitability of these measures are to be judged by expected maximal strain, the control of motion pattern, the effect of external forces as well as by the hazard to fall. Each and every sport activity has to be accompanied by supportive gymnastics. The most important sport disciplines are evaluated.