Effects of Power-Oriented Resistance Training With Heavy vs. Light Loads on Muscle-Tendon Function in Older Adults: A Study Protocol for a Randomized Controlled Trial
Effects of Power-Oriented Resistance Training With Heavy vs. Light Loads on Muscle-Tendon Function in Older Adults: A Study Protocol for a Randomized Controlled Trial
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BackgroundPower-oriented resistance training (PRT) is one of the most effective exercise programs to counteract neuromuscular and physical function age-related declines.However, the optimal load that maximizes these outcomes or the load-specific adaptations induced on muscle power determinants remain to be better understood.Furthermore, to investigate whether these adaptations are potentially transferred to an untrained limb (i.
e., cross-education BODY WASH phenomenon) could be especially relevant during limb-immobilization frequently observed in older people (e.g.
, after hip fracture).MethodsAt least 30 well-functioning older participants (>65 years) will participate in a within-person randomized controlled trial.After an 8-week control period, the effects of two 12-week PRT programs using light vs.
heavy loads will be compared using Cold Sores an unilateral exercise model through three study arms (light-load PRT vs.non-exercise; heavy-load PRT vs.non-exercise; and light- vs.
heavy- load PRT).Muscle-tendon function, muscle excitation and morphology and physical function will be evaluated to analyze the load-specific effects of PRT in older people.Additionally, the effects of PRT will be examined on a non-exercised contralateral limb.
DiscussionTailored exercise programs are largely demanded given their potentially greater efficiency preventing age-related negative consequences, especially during limb-immobilization.This trial will provide evidence supporting the use of light- or heavy-load PRT on older adults depending on individual needs, improving decision making and exercise program efficacy.Clinical Trial RegistrationNCT03724461 registration data: October 30, 2018.