The effects of hydraulic resistance strength training in pre-pubertal males.
The effects of hydraulic resistance strength training in pre-pubertal males.
复制标题
液压阻力力量训练对青春期前男性的影响。
DOI：
10.1249/00005768-198612000-00005
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发表时间：
1986
影响因子：
4.1
通讯作者：
F. Katch
中科院分区：
文献类型：
--
作者：
A. Weltman;C. Janney;C. Rians;K. Strand;B. Berg;S. Tippitt;J. Wise;B. Cahill;F. Katch
为了检查液压阻力力量训练在年轻男性中的有效性和安全性，26名青春期前男性（平均年龄= 8.2 +/- 1.3岁）完成了一项为期14周的力量训练研究。在14周的实验期之前和之后，对受试者的青春期状态进行评估（坦纳性成熟度评分、血清睾酮和血清硫酸二氢表雄酮）。力量训练计划的有效性通过测量以下方面的前后差异来确定：在两种速度（30度和90度X s-1）下膝关节和肘关节处的屈曲和伸展的等速力量（KIN COM，Chatecx，Inc.，查塔努加，TN），柔韧性，立定跳远，垂直跳，身体成分参数，最大耗氧量和肌酐磷酸激酶。力量训练的安全性通过训练前后的双相肌肉骨骼造影和医生对受试者的投诉进行评估。力量训练受试者（N = 16）参加了45 min/次，3次/周，14周的监督力量训练计划，出勤率为91.5%。参与者使用液压阻力设备（Hydra-Fitness Industries，Belton，TX）进行同心作业。未进行偏心工作。对照组（N = 10）不进行力量训练，但参加体育活动和日常生活活动。结果表明，力量训练受试者增加等速力量作为力量训练的结果（平均同心工作/重复增加18.5至36.6%的8个运动测试;扭矩分数超过前90%的运动范围增加13.1至45.1%的8个运动测试）。这些变化明显大于对照组的变化（P <0.05）。在实验期后，力量训练受试者在垂直跳跃（+10.4%）、柔韧性（+8.4%）和最大耗氧量[+19.4%（1 × min-1），+13.8%（ml × kg × min-1）]方面也表现出显著改善（与对照受试者相比）。肌肉骨骼闪烁扫描显示，没有证据表明力量训练对骨骺、骨骼或肌肉造成损伤。仅报告了1例力量训练相关损伤（左肩疼痛，错过3次力量训练）。相比之下，6名力量训练受试者在日常生活活动中受伤，导致47次力量训练缺席。得出的结论是，在短期内，监督同心力量训练使用液压阻力设备是安全和有效的青春期前的男孩。
In order to examine the effectiveness and safety of hydraulic resistance strength training in young males, 26 pre-pubertal males (mean age = 8.2 +/- 1.3 yr) completed a 14-wk strength training study. Subjects were evaluated before and after the 14-wk experimental period for pubertal state (Tanner's sexual maturity rating, serum testosterone, and serum dihydroepiandrosterone sulfate). Effectiveness of the strength training program was determined by measuring pre-post differences in: isokinetic strength for flexion and extension at the knee and elbow joints at two speeds (30 degrees and 90 degrees X s-1) (KIN COM, Chattecx, Inc., Chattanooga, TN), flexibility, standing long jump, vertical jump, body composition parameters, maximal oxygen consumption, and creatinine phosphokinase. Safety of strength training was assessed by biphasic musculoskeletal scintigraphy before and after the program and by physician evaluation of complaints by subjects. Strength training subjects (N = 16) participated in a 45 min/session, 3 session/wk, 14-wk supervised strength training program with an attendance rate of 91.5%. Participants performed concentric work using hydraulic resistance equipment (Hydra-Fitness Industries, Belton, TX). Eccentric work was not performed. Control subjects (N = 10) did not strength train but did participate in sport activities and activities of daily living. Results indicated that strength training subjects increased isokinetic strength as a result of strength training (average concentric work/repetition increases by 18.5 to 36.6% for the eight motions tested; torque scores over the first 90% of the range of motion increases by 13.1 to 45.1% for the eight motions tested). These changes were significantly greater than changes seen in the control group (P less than 0.05). Strength training subjects also demonstrated significant improvements (as compared to control subjects) in vertical jump (+10.4%), flexibility (+8.4%), and maximal oxygen consumption [+19.4% (l X min-1), +13.8% (ml X kg X min-1)] after the experimental period. Musculoskeletal scintigraphy revealed no evidence of damage to epiphyses, bone, or muscle as a result of strength training. Only one strength training-related injury was reported (left shoulder pain, 3 strength training sessions missed). In contrast, six strength training subjects sustained injuries during activities of daily living, resulting in 47 missed strength training sessions. It was concluded that, in the short term, supervised concentric strength training using hydraulic resistance equipment is safe and effective in pre-pubertal boys.