Muscle fa- tigue is characterized by exercise-induced inability to produce power and ... buffering, and oxidative enzyme activation during exercise (cf., Thomas,.
DECREASED ACTIVATION IN THE PRIMARY MOTOR CORTEX AREA DURING MIDDLE-INTENSITY HAND GRIP EXERCISE TO EXHAUSTION IN ATHLETE AND NONATHLETE PARTICIPANTS1, 2 KENICHI SHIBUYA
NAOMI KUBOYAMA
Center for General Education Nagasaki Institute of Applied Science
Faculty of Business Administration Osaka University of Commerce
Research Institute of Physical Fitness Japan Women’s College of Physical Education Summary.—It remains unclear whether activation kinetics in the motor cortex area is affected by training. The purpose of the present study was to examine the effect of training on the motor cortex activation. To accomplish this, the correlation between maximal voluntary contraction and motor cortex (M1) activity was examined. Differences in the motor cortex activation between two groups during exercise were examined in 14 male volunteer participants (M age 25.2 yr., SD = 1.4): seven highly trained athletes (VO2max = 60 ml/kg/min.; maximal voluntary contraction > 55 kg, M MVC = 63.6 kg, SD = 4.2) and seven nonathletes (VO2max
