Belman M J, Gaesser G A
Division of Pulmonary Medicine, Cedars-Sinai Medical Center, Los Angeles, CA 90048.
Med Sci Sports Exerc. 1991 May;23(5):562-8.
In this study we report the effects of training at intensities below and above the lactate threshold on parameters of aerobic function in elderly subjects (age range 65-75 yr). The subjects were randomized into high-intensity (HI, N = 8; 75% of heart rate reserve = approximately 82% VO2max = approximately 121% of lactate threshold) and low-intensity (LI, N = 9; 35% of heart rate reserve = approximately 53% VO2max = approximately 72% of lactate threshold) training groups which trained 4 d.wk-1 for 30 min.session-1 for 8 wk. Before and after the training, subjects performed an incremental exercise test for determination of maximal aerobic power (VO2max) and lactate threshold (LT). In addition, the subjects performed a 6-min single-stage exercise test at greater than 75% of pre-training VO2max (SST-High) during which cardiorespiratory responses were evaluated each minute of the test. After training, the improvements in VO2max (7%) for LI and HI were not different from one another (delta VO2max for LI = 1.8 +/- 0.7 ml.kg-1.min-1; delta VO2max for HI = 1.8 +/- 1.0 ml.kg-1.min-1) but were significantly greater (P = 0.02) than the post-testing change observed in the control group (N = 8). Training improved the LT significantly (10-12%; P less than 0.01) and equally for both LI and HI (delta LT for for LI = 2.3 +/- 0.6 ml O2.kg-1.min-1; delta LT for HI = 1.8 +/- 0.8 ml O2.kg-1.min-1).(ABSTRACT TRUNCATED AT 250 WORDS)
在本研究中，我们报告了低于和高于乳酸阈值强度的训练对老年受试者（年龄范围65 - 75岁）有氧功能参数的影响。受试者被随机分为高强度（HI，N = 8；心率储备的75% = 约82%最大摄氧量 = 约乳酸阈值的121%）和低强度（LI，N = 9；心率储备的35% = 约53%最大摄氧量 = 约乳酸阈值的72%）训练组，每周训练4天，每次训练30分钟，共训练8周。训练前后，受试者进行递增运动测试以确定最大有氧功率（最大摄氧量）和乳酸阈值（LT）。此外，受试者在高于训练前最大摄氧量75%的强度下进行6分钟单阶段运动测试（SST - High），测试过程中每分钟评估心肺反应。训练后，LI组和HI组的最大摄氧量改善（7%）彼此无差异（LI组最大摄氧量变化量 = 1.8 ± 0.7 ml·kg⁻¹·min⁻¹；HI组最大摄氧量变化量 = 1.8 ± 1.0 ml·kg⁻¹·min⁻¹），但显著大于对照组（N = 8）测试后的变化（P = 0.02）。训练使LT显著提高（10 - 12%；P < 0.01），LI组和HI组提高程度相同（LI组LT变化量 = 2.3 ± 0.6 ml O₂·kg⁻¹·min⁻¹；HI组LT变化量 = 1.8 ± 0.8 ml O₂·kg⁻¹·min⁻¹）。（摘要截短于250字）
