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Fundamental results in micro-biological investigation of exercise induced adaptability using the ergometrical method of new measurement.

使用新测量的测力方法对运动引起的适应性进行微生物研究的基本结果。

基本信息

批准号：
14380021
负责人：
SHINDO Munehiro
金额：
$ 8.7万
依托单位：
Fukuoka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2002
资助国家：
日本
起止时间：
2002 至 2004
项目状态：
已结题

项目摘要

The purpose of this study is to determine which exercise stimuli induce regular changes in production of capillaries in different types of muscle fiber. Training was conducted using ergometers to measure the lactate threshold(LT) intensity and the onset of blood lactate accumulation(OBLA) intensity. The measures of exercise stimuli were the work rate per weight and per lean body mass(LBM), pedaling torque per weight and per LBM,VO2/wt,VO2/LBM, %VO2max, and relative working muscular ischemic threshold (%WMIT) obtained through dividing pedaling torque by WMIT.The result was that the number of capillaries around muscle fiber type I was unchanged at both intensities, -LT and OBLA-after 5^<th> day of training, but it increased relatively 6 weeks after training initiation, which indicated full training adaptation. The increase ratios for type IIa and type Ix at 5^<th> day of training showed the positive correlation to %WMIT for both LT and OBLA intensity trainings. Central regression lines between %WMIT (x axis) and type IIa, type IIx, (y axis) were for type IIa : y=0.041x-1.273;for type II x : y=0.031x-0.866. These regression lines indicate that the necessary %WMIT to produce new capillaries is higher than 31% in type IIa and 28% in type IIx. All regression lines show that producing capillaries around type IaI and type IIx fibers require %WMIT higher than 30%. This suggests that the necessary exercise stimuli for producing capillaries in muscle fibers are the skeletal muscle tensions, especially relative working muscular ischemic threshold, not by the mechanical work rate or physiological power

本研究的目的是确定哪些运动刺激会诱导不同类型肌肉纤维中毛细血管生成的规律变化。使用测力计进行训练，以测量乳酸阈值（LT）强度和血乳酸蓄积开始（OBLA）强度。以单位体重和单位瘦体重的作功率、单位体重和单位瘦体重的蹬踏扭矩、VO 2/wt、VO 2/LBM、%VO2max和用蹬踏扭矩除以相对工作肌缺血阈值（%WMIT）作为运动刺激指标，结果表明，在LT和OCLA两种强度下，训练后第5天，I型肌纤维周围毛细血管数无<th>明显变化，但在训练开始后第6周，毛细血管数相对增加，表明训练适应充分。在<th>训练的第5天，对于LT和OBLA强度训练，IIa型和IX型的增加比率与%WMIT呈正相关。%WMIT（x轴）与IIa型、IIx型（y轴）之间的中心回归线为：IIa型：y=0.041x-1.273; II型x：y=0.031x-0.866。这些回归线表明，产生新毛细血管所需的%WMIT在IIa型中高于31%，在IIx型中高于28%。所有回归线表明，在I型纤维和IIx型纤维周围产生毛细管需要高于30%的%WMIT。提示骨骼肌张力，尤其是相对工作肌缺血阈值是肌纤维毛细血管生成所必需的运动刺激，而不是机械功率或生理功率