筋電図積分値による高齢者のAnaerobic thresholdの決定

概要

論文の詳細を見る
A study was conducted to examine the feasibility and validity of using integrated electromyographic signals (IEMG) for determination of anaerobic threshold (AT) in the elderly. Twentynine healthy elderly subjects (aged 67.6±7.7 yr) and twelve young males (aged 23.2±7.9 yr) performed ramp cycle exercise to exhaustion, increasing at a rate of 12.5 W/min for the elderly group and 25.0 W/min for the young group, following 3 min of exercise at zero work load. Myoelectrical signals were measured continuously from the vastus lateralis muscle, and values in terms of IEMG were computed every 10 s throughout the test with A/D conversion at 500 Hz. For the criterion of IEMG threshold, the breakpoint in the relationship between power output and IEMG was determined by two-segmentall linear regression. VT was defined as the VO_2, at the onset of a nonlinear increase in VE and/or a sustained rise in VE/VO_2 without a rise in VE/VCO_2. It was found that the value of VO_2 in terms of IEMGT was similar to VT in both groups, 16.3 and 18/kg/min for the eldedy group and 33.5 and 36.3 ml/kg/min for the young group, respectively. Furthemore,IEMGT was correlated ignificantly (P<0.001) with VT in both groups (r=0.871 for the elderly group and r=0.925 for the young group). It is concluded that the IEMGT method for determination of AT in the elderly is simple and useful.
1992-04-01