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目的:研究力量训练负荷与组间间歇时间对男性大学生心率、血压及血浆儿茶酚胺水平的影响。方法:健康男性大学生16人,分别在不同时间参加4种不同负荷与间歇时间的膝关节屈伸等张训练:6RM+短时间间歇,12RM+短时间间歇,6RM+长时间间歇和12RM+长时间间歇。短时间间歇的时间与每组持续收缩时间之比为3∶1,长时间间歇的时间与每组持续收缩的时间之比为5∶1。所有方案均包括3组练习。测量受试者安静状态及每组运动后即刻心率和血压,并测定安静与运动后即刻、10 min、30 min、90 min、180 min时的血浆儿茶酚胺水平。结果:负荷(F=6.84,P<0.001)和组数(F=6.84,P<0.01)对心率产生独立影响,而间歇时间(F=2.55,P=0.086)影响不明显;组数(F=61.36,P<0.001)与间歇时间(F=4.92,P<0.05)对收缩压影响较大,负荷对收缩压无显著影响(F=0.043,P=0.402)。组数(F=78.36,P<0.001)、间歇时间(F=7.14,P<0.01)与负荷(F=4.27,P<0.05)均对心率收缩压两项乘积有显著影响;长时间间歇训练后血浆去甲肾上腺素水平显著降低(P<0.05),受间歇时间影响更明显。结论:力量训练负荷对练习者心率影响较大,而间歇时间对收缩压影响更大:采取同等负荷进行力量训练,较长的组间间歇时间可显著减轻练习者心血管反应,降低其心血管负担。
Objective: To study the effects of strength training load and interval between groups on heart rate, blood pressure and plasma catecholamine levels in male college students. Methods: Sixteen healthy male college students were enrolled in four knee flexion and extension exercises with different load and intermittent time at different times: 6RM + short interval, 12RM + short interval, 6RM + long interval and 12RM + long interval. Short duration of time and each group continued to shrink the ratio of 3: 1, prolonged intermittent time and each group continued to shrink the ratio of 5: 1. All programs include 3 exercises. The subject’s resting state and heart rate and blood pressure immediately after exercise were measured. Plasma catecholamine levels were measured at 10 minutes, 30 minutes, 90 minutes and 180 minutes immediately after exercise. (F = 6.84, P <0.001) and the number of groups (F = 6.84, P <0.01) had no significant effect on heart rate, while intermittent time (F = 2.55, = 61.36, P <0.001) and intermittent time (F = 4.92, P <0.05) had a significant effect on systolic blood pressure with no significant effect on systolic blood pressure (F = 0.043, P = 0.402). The effects of interval time (F = 7.14, P <0.01) and load (F = 4.27, P <0.05) both had significant effects on the two products of heart rate systolic pressure (F = 78.36, P <0.001) After plasma norepinephrine levels were significantly lower (P <0.05), more significantly affected by intermittent time. CONCLUSION: Strength training load has a significant impact on exerciser heart rate, while intermittent time has a greater effect on systolic blood pressure. Taking the same load for strength training, a longer inter-group interval can significantly reduce cardiovascular risk and reduce cardiovascular risk burden.