Objective: This study aimed to investigate the acute effects of laser photobiomodulation (λ: 808 nm) therapy on muscle performance and perceived exertion in physically active elderly women. Methods: Seventeen physically active elderly women (72.6 ± 4.1 years) participated in a crossover study in which they received active or placebo laser therapy on the rectus femoris muscle on 2 occasions, separated by a 7-day washout period. On each occasion, the following performance outcomes were assessed: functional capacity by short physical performance battery, knee extensor strength by maximum voluntary isometric contraction, muscle endurance by repetitions-to-failure test and blood lactate levels, and perceived exertion. Results: No statistical (P >.05) differences were observed between active and placebo laser conditions for all muscle performance outcome (ie, short physical performance battery, maximum voluntary isometric contraction, repetitions-to-failure, and lactate) and perceived exertion. Conclusions: Acute laser photobiomodulation therapy at 808 nm does not improve muscle performance (functional capacity, strength, and endurance) and perceived exertion in physically active elderly women. Trial registration: NCT04241991.

Effects of Laser Photobiomodulation Therapy at 808 nm on Muscle Performance and Perceived Exertion in Elderly Women

Buzzachera, Cosme Franklim;
2020-01-01

Abstract

Objective: This study aimed to investigate the acute effects of laser photobiomodulation (λ: 808 nm) therapy on muscle performance and perceived exertion in physically active elderly women. Methods: Seventeen physically active elderly women (72.6 ± 4.1 years) participated in a crossover study in which they received active or placebo laser therapy on the rectus femoris muscle on 2 occasions, separated by a 7-day washout period. On each occasion, the following performance outcomes were assessed: functional capacity by short physical performance battery, knee extensor strength by maximum voluntary isometric contraction, muscle endurance by repetitions-to-failure test and blood lactate levels, and perceived exertion. Results: No statistical (P >.05) differences were observed between active and placebo laser conditions for all muscle performance outcome (ie, short physical performance battery, maximum voluntary isometric contraction, repetitions-to-failure, and lactate) and perceived exertion. Conclusions: Acute laser photobiomodulation therapy at 808 nm does not improve muscle performance (functional capacity, strength, and endurance) and perceived exertion in physically active elderly women. Trial registration: NCT04241991.
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11571/1514740
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