Seaward B L, Clarke D H
American University, College Park, MD.
J Sports Med Phys Fitness. 1992 Sep;32(3):243-9.
Twelve male subjects, ages 18-32, performed low, moderate, and high intensity systemic treadmill exercise to examine its effect on isometric strength and fatigue of the handgrip muscles. Baseline handgrip values were recorded, as well as maximal oxygen uptake and ventilatory threshold (VT), to determine the intensity for each of the three exercise conditions. Task A involved a 10-min treadmill run at 20% below VT, task B was given at VT, and task C was 20% above VT. Immediately following the endurance treadmill run the subjects were given a 2-min isometric contraction at maximum intensity. Heart rate and blood pressure were also measured. No significant differences were found between control measures and the strength and endurance variables. Rates of fatigue were similar for all conditions, and heart rate and blood pressure remained elevated during the handgrip fatigue task. It is concluded that isometric strength and endurance of non-involved muscles are not affected by prior endurance exercise.
12名年龄在18至32岁之间的男性受试者进行了低强度、中等强度和高强度的全身跑步机运动，以研究其对握力肌肉等长力量和疲劳的影响。记录了握力基线值、最大摄氧量和通气阈值（VT），以确定三种运动条件下各自的强度。任务A是在低于VT 20%的强度下进行10分钟的跑步机跑步，任务B是在VT强度下进行，任务C是在高于VT 20%的强度下进行。在耐力跑步机跑步后，立即让受试者进行2分钟的最大强度等长收缩。同时测量了心率和血压。在对照测量与力量和耐力变量之间未发现显著差异。所有条件下的疲劳率相似，并且在握力疲劳任务期间心率和血压持续升高。研究得出结论，未参与运动的肌肉的等长力量和耐力不受先前耐力运动的影响。
