| Title |
Motor performance is preserved in healthy aged adults following severe whole-body hyperthermia / |
| Authors |
Brazaitis, Marius ; Paulauskas, Henrikas ; Eimantas, Nerijus ; Daniuseviciute, Laura ; Volungevicius, Gintautas ; Skurvydas, Albertas |
| DOI |
10.1080/02656736.2018.1533650 |
| Full Text |
|
| Is Part of |
International journal of hyperthermia.. London : Taylor & Francis. 2019, vol. 36, iss. 1, p. 65-74.. ISSN 0265-6736. eISSN 1464-5157 |
| Keywords [eng] |
aging muscle ; electromyography (EMG) ; Heat stress ; reflexes |
| Abstract [eng] |
Healthy aging is associated with a progressive decline in motor performance and thermoregulatory efficiency. Functional consequences of severe whole-body hyperthermia on neurophysiological functions in healthy aged men have not been investigated. To determine whether severe whole-body hyperthermia (increase in rectal temperature of about 2.5 °C) induced by lower-body heating in older men (64–80 years, n = 9) would suppress excitability of reflexes, voluntarily and electrically induced ankle plantar flexor contractile properties were compared with those in young men (19–21 years, n = 11). Though no aging effect on hyperthermia-induced reflex amplitudes was observed, a decrease in maximal H-reflex and V-wave latencies was found to be greater in older than in young men. In older men, lower-body heating was accompanied by a significant increase in twitch and tetani test torque in parallel with a greater decrease in muscle contraction time. There was no temperature-depended aging effect on the voluntary activation and maximal voluntary torque production. Despite delayed and weakened thermoregulation and age-related decline in neuromuscular function, motor performance in whole-body severe hyperthermia is apparently preserved in healthy aging. |
| Published |
London : Taylor & Francis |
| Type |
Journal article |
| Language |
English |
| Publication date |
2019 |
| CC license |
|
