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Is It Possible to Individualize Intensity of Eccentric Cycling Exercise From Perceived Exertion on Concentric Test? / Davy Laroche in Archives of Physical Medicine and Rehabilitation, 2013/8 (2013)
Titre : Is It Possible to Individualize Intensity of Eccentric Cycling Exercise From Perceived Exertion on Concentric Test? Type de document : Article Auteurs : Davy Laroche ; Charles Joussain ; Claire Espagnac ; [et al.] Article en page(s) : pp. 1621-1627 Langues : Anglais (eng) Descripteurs : HE Vinci
Débit systolique ; Exercice physique ; Rééducation et réadaptation
Mots-clés : Cardiac output Débit cardiaque Exercise Oxygen consumption Consommation d'oxygène Resistance training Entraînement en résistance Stroke volume Résumé : Objective
To assess the safety and acute effects of a procedure using perceived exertion during a prior submaximal concentric (CON) test to individualize eccentric (ECC) cycling exercise intensity.
Prospective, monocentric open study.
Technological investigation platform at a physical medicine and rehabilitation department in a university hospital.
Healthy subjects (N=18; 15 men, 3 women) aged between 22 and 37 years.
The subjects performed 3 cycling exercises: (1) incremental CON test to determine the comfortable pedaling power (CPP) corresponding to a Borg scale rating of 12 (rate of perceived exertion); (2) steady-state CON exercise at the CPP workload to determine the corresponding plantar pressure; and (3) steady-state ECC exercise with an imposed resistance corresponding to the CPP plantar pressure.
Main Outcome Measures
Rate of perceived exertion on Borg scale, oxygen uptake (VO2Max), heart rate, cardiac output, and stroke volume using inert gas rebreathing techniques were measured during steady-state CON and ECC exercises. Muscle soreness was rated on a visual analog scale immediately, 24, and 48 hours after the tests.
No adverse effects were reported. VO2Max was about 5 times the resting value during CON exercise, while it was twice that during ECC exercise. Cardiac output was lower during ECC exercise (P<.05 this moderate increase of cardiac output was exclusively linked to a greater in stroke volume during ecc exercise than con> Conclusions
Moderate-intensity ECC cycling exercise tailored according to perceived exertion during a prior CON test is well tolerated. It corresponds to a limited muscular use of oxygen and to an isolated increase in stroke volume. It appears to be a feasible procedure for preconditioning before ECC training.
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in Archives of Physical Medicine and Rehabilitation > 2013/8 (2013) . - pp. 1621-1627[article]