Akira Nagata

Critical power as a measure of physical work capacity and anaerobic threshold

Monod and Scherrer (1965) showed that there was a linear relation between the maximal work and the maximal time over which the work was performed until the onset of local muscular exhaustion. This linear relation could be expressed by the equation: W lim =a+bT lim, where maximal work (Wlim) was thought to result from the use of an energy reserve (a) and an energy reconstitution whose maximal rate was (b) We have extended this concept to total body work (bicycle ergometer). Eight male and eight female college students underwent exercise tests at 400, 350, 300,275 and 300,250,200,175 W respectively, to the onset of fatigue. The regression analysis revealed that the linearity of individual plots was found to be 0-982<R 2<0 998 (p<0 01). Experimental results indicated that the maximal energy reconstitution rate (b) was correlated with the onset of anaerobic threshold (AT) as determined by the gas exchange method (r = 0 928, p <0 01). Furthermore, the sum of (a) and (b) (energy reserve and maximal rate of ener...

The validity of anaerobic threshold determination by a Douglas bag method compared with arterial blood lactate concentration

SummaryUsing an open circuit system (Douglas bag method), measurement of the anaerobic threshold (AT) was performed on ten healthy male college students during an incremental exercise test on a bicycle ergometer in an attempt to determine the validity of this method as compared with arterial blood lactate AT measurement.Blood samples were taken from either the radial or brachial artery through a Teflon catheter (3 ml/each time) every minute until the subjects maximal exercise tolerance was reached. Blood lactate was analyzed by the enzymatic method.Differences in work rate,

A METHOD FOR MEASURING MUSCULAR GROUP "CONTROL-ABILITY" AND ITS APPARATUS

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FREQUENCY CHARACTERISTICS IN ISOTONIC MUSCULAR CONTRACTIONS FROM CORRELATION FUNCTION AND FOURIER TRANSFORMATION OF SURFACE ELECTROMYOGRAM (THE SECOND REPORT)

O2, %

FREQUENCY CHARACTERISTICS IN ISOMETRIC MUSCULAR CONTRACTIONS FROM CORRELATION FUNCTION AND FOURIER ANALYSIS OF SURFACE ELECTROMYOGRAM

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MOTOR CONTROL OF LANDING MOTION ON KINETIC ANALYSES ABOUT ABSORBABILITY

O2 max,