Deejay_Spike
Freaky Bodybuilder
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Hie nog een stukje dat wel eens interessant lijkt om over de praten.
Wat is beter om de cardiovasculaire gezondheid te verbeteren en je hart te versterken tegen hartaanvallen?
het standaard antwoord van veel dokters zal bijna altijd hetzelfde zijn. wandelen, fietsen, enz. allemaal uithoudingssporten op een heel lage intensiteit. maar waarom? en is deze manier van doen wel de goede? waarom niet het probleem aanpakken ipv te blijven dobberen en de confrontatie te vermijden? wat denken jullie ervan?
lees ook het stukje hieronder eer je wat post.
Wat is beter om de cardiovasculaire gezondheid te verbeteren en je hart te versterken tegen hartaanvallen?
het standaard antwoord van veel dokters zal bijna altijd hetzelfde zijn. wandelen, fietsen, enz. allemaal uithoudingssporten op een heel lage intensiteit. maar waarom? en is deze manier van doen wel de goede? waarom niet het probleem aanpakken ipv te blijven dobberen en de confrontatie te vermijden? wat denken jullie ervan?
lees ook het stukje hieronder eer je wat post.
INTRODUCTORY NOTE
For newcomers to this forum, these P&Ps are Propositions, not facts or dogmatic proclamations. They are intended to stimulate interaction among users working in different fields, to re-examine traditional concepts, foster distance education, question our beliefs and suggest new lines of research or approaches to training. We look forward to responses from anyone who has views or relevant information on the topics.
PP 55 Cardio Exercise paradox
Long endurance low intensity training may not be the best and sole way of enhancing cardiovascular heath and resistance to heart 'attacks'.
For many years cardiovascular health and wellness has been associated almost entirely with plenty of long distance running, cycling, walking and other continuous low duration, low intensity exercise. Cardiac rehabilitation has concentrated solely on this type of exercise. The same approach has been applied in the case of chronic hypertension and prevention of fatal heart attacks.
Often the renowned Paffenbarger study on longshoreman is quoted in support of the benefits of cardiovascular exercise on quality of life, insurance against sudden heartfrom heart disease and so on. Yet, it is not often emphasised that longshoremen (dock-workers) lift, carry, throw and generally execute anaeobic tasks in intervals of work and rest. Paffenbarger's study and subsequent ones on Harvard graduates showed that it was energy expenditure that really counted in preventing heart disease. In other words, any form of regular activity which offers sufficient metabolic stimulation and energy expenditure, irrespective of type, is what the doctor ordered!
After all, there do not seem to be any studies which definitely prove that any one form of regular exercise is superior to another in lowering the risk of heart disease or sudden death from heart disease. Neither is there total certainty that predominantly 'aerobic' type training is superior to predominantly 'anaerobic' type training in improving cardiac health, despite the evidence for significant differences in the changes produced in the cardiac volume, pumping characteristics and muscle wall thickness by the different types of training. 'Aerobic' training just makes one 'fitter' to cope With 'aerobic' events, 'strength' training makes one 'fitter' for strength events and so forth.
In fact, Dr Dobrev and other medical experts in Bulgaria have been running cardiac rehabilitation programmes (even for very senior adults) using Olympic rowing and weightlifting as major components of the intervention. Apparently their results are comparable with those obtained from similar 'aerobic' type programmes applied in the West at the Cooper Institute and elsewhere.
Another comment: LSD (Long slow duration) training is a generally continuous, low intensity type of exercise which permits a plentiful and regular supply of blood (and oxygen) to reach the heart. This would imply, according to the Principles of Specificity of adaptation and training that LSD training prepares one to cope with precisely this type of stress. Additionally it may assist in enhancing the pumping capability, elasticity and volume of the heart, but it does not specifically prepare the cardiocirculatory and related systems for coping with more catastrophic changes of state, such as local ischaemia.
On the other hand, heavy resistance training is usually accompanied by regular use of the Valsalva manoeuvre, interrupted blood supply to many muscles, dramatic changes in flow of blood to and from the heart and activities which produce major postural changes in blood pressure. Sometimes, the activity is continued for many seconds under these highly resisted and temporarily ischamic conditions, thereby producing long term changes in local muscle endurance, among other changes. Now, heart 'attacks' are associated more with this type of situation compared with the very regular situation associated with LSD exercise.
In other words, heavy resistance training would appear to prepare one more specifically to cope with a heart 'attack' situation than LSD training. This is not to state that maximal resistance training should be the preferred approach - rather, the Principle of Gradual Progressive Overload (and periodic underload to facilitate adaptation and recovery) should be adhered to in a special type of Cardiac Periodisation Scheme. Certainly, LSD training would form part of the scheme, but properly phased resistance training should play a major role in improving the current state of the art of cardiac rehabilitation and health.
Does this argument not appear to be logical? Discuss this issue, quoting any research which you consider to have a bearing on this proposition. Remember that this is a very controversial topic and any challenge to the current LSD or Cardiovascular Doctrine would have to be very carefully justified.
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Dr Mel C Siff
Denver, USA




. Lekker in de frisse lucht, muziekje mee, beetje overpeinzend, weg van alles (zen in beweging
. Gaandeweg moet iemand dus steeds meer zijn best doen om zijn hart even hard in te laten spannen.