The effect of temperature on amount and structure of motor variability during 2-minute maximum voluntary contraction.

Abstract:

INTRODUCTION:In this study, we questioned whether local cooling of muscle or heating involving core and muscle temperatures are the main indicators for force variability. METHODS:Ten volunteers performed a 2-min maximum voluntary contraction (MVC) of the knee extensors under control (CON) conditions after passive heating (HT) and cooling (CL) of the lower body. RESULTS:HT increased muscle and rectal temperatures, whereas CL lowered muscle temperature but did not affect rectal temperature. During 2-min MVC, peak force decreased to a lower level in HT compared with CON and CL experiments. Greater central fatigue was found in the HT experiment, and there was less in the CL experiment than in the CON experiment. CONCLUSIONS:Increased core and muscle temperature increased physiological tremor and the amount and structural complexity of force variability of the exercising muscles, whereas local muscle cooling decreased all force variability variables measured.

journal_name

Muscle Nerve

journal_title

Muscle & nerve

authors

Brazaitis M,Skurvydas A,Pukėnas K,Daniuseviciūtė L,Mickevicienė D,Solianik R

doi

10.1002/mus.23397

subject

Has Abstract

pub_date

2012-11-01 00:00:00

pages

799-809

issue

5

eissn

0148-639X

issn

1097-4598

journal_volume

46

pub_type

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