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首页> 外文期刊>Physiological Reports >Three weeks of respiratory muscle endurance training improve the O 2 cost of walking and exercise tolerance in obese adolescents
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Three weeks of respiratory muscle endurance training improve the O 2 cost of walking and exercise tolerance in obese adolescents

机译：为期三周的呼吸肌耐力训练可改善肥胖青少年的O 2行走和运动耐力成本

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Obese adolescents (OB) have an increased O 2 cost of exercise, attributable in part to an increased O 2 cost of breathing. In a previous work a short (3‐week) program of respiratory muscle endurance training (RMET) slightly reduced in OB the O 2 cost of high‐intensity cycling and improved exercise tolerance. We hypothesized that during treadmill walking the effects of RMET would be more pronounced than those observed during cycling. Sixteen OB (age 16.0?±?0.8?years; body mass [BM] 127.7?±?14.2?kg; body mass index 40.7?±?4.0?kg/m 2 ) underwent to 3‐week RMET ( n? = ? 8) superimposed to a multidisciplinary BM reduction program, or (CTRL, n? = ? 8) only to the latter. Heart rate (HR) and pulmonary O 2 uptake ( O 2 ) were measured during incremental exercise and 12‐min constant work rate (CWR) walking at 60% (moderate‐intensity, MOD) and 120% (heavy‐intensity, HEAVY) of the gas exchange threshold (GET). The O 2 cost of walking (aerobic energy expenditure per unit of covered distance) was calculated as O 2 /velocity. BM decreased (~4–5?kg) both in CTRL and in RMET. O 2 peak and GET were not affected by both interventions; the time to exhaustion increased following RMET. During MOD and HEAVY RMET decreased O 2, the O 2 cost of walking (MOD: 0.130?±?0.033?mL/kg/m [before] vs. 0.109?±?0.027 [after], P? = ? 0.03; HEAVY: 0.196?±?0.031 [before] vs. 0.180?±?0.025 [after], P? = ? 0.02), HR and rates of perceived exertion; no significant changes were observed in CTRL. In OB a short RMET program lowered the O 2 cost of MOD and HEAVY walking and improved exercise tolerance. RMET could represent a useful adjunct in the control of obesity.
机译：肥胖青少年（OB）的运动O 2费用增加，部分原因是呼吸的O 2费用增加。在以前的工作中，短期（3周）的呼吸肌耐力训练（RMET）计划使OB的高强度骑自行车的O 2成本略有降低，并提高了运动耐力。我们假设在跑步机上行走时，RMET的影响将比骑自行车时观察到的更为明显。进行了16周的OB（年龄16.0±±0.8？岁;体重[BM] 127.7±±14.2？kg;体重指数40.7±±4.0？kg / m 2），进行了3​​周的RMET（n = 10）。 8）叠加到多学科的BM减少程序上，或者仅（后者，n？=？8）。在递增运动和60％（中等强度，MOD）和120％（重度，HEAVY）下行走的12分钟恒定工作率（CWR）下测量心率（HR）和肺部O 2摄取（O 2）气体交换阈值（GET）。步行的O 2成本（每覆盖距离单位的有氧能量消耗）计算为O 2 /速度。 CTRL和RMET中的BM均降低（〜4–5？kg）。 O 2峰值和GET不受两种干预的影响; RMET后，筋疲力尽的时间增加了。在MOD和HEAVY RMET降低O 2期间，行走的O 2成本（MOD：0.130±±0.033mL / kg / m [之前]与0.109±±0.027 [之后]，P = 0.03; HEAVY ：0.196±±0.031 [之前]与0.180±±0.025 [之后]，P 1 ＝≥0.02），HR和感知劳累率; CTRL中没有观察到明显的变化。在OB中，较短的RMET程序降低了MOD和HEAVY步行的O 2成本，并提高了运动耐力。 RMET可能代表控制肥胖的有用辅助手段。

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