停訓與減量策略對青少年跆拳道選手力量表現之影響

目的 :分析跆拳道青少年選手完成 12週阻力訓練後，執行停訓 (detraining, DT) 或減量訓練 (tapering, TP)對力量表現之影響。方法 : 22名完成 12週阻力訓練之現役男性青少年跆拳道選手為受試者，以最大肌力水準分層隨機分配為 11位停訓組 (detraining group. DTG) 及 11位減量組 (tapering group, TPG)。TPG維持前一期訓練計畫中「速度與爆發力訓練期」之訓練強度與頻率，但訓練量減半的阻力訓練。前一期阻力訓練結束 48小時進行前測，前測結束後第 7天及第 14天分別進行中測與後測。依變項包括最大肌力、50毫秒發力率、100毫秒發力率及反向跳高度。以單因子相依變異數分析及獨立樣本t檢定比較組內與組間差異，組內差異若達顯著水準以 Bonferroni 法進行事後比較。結果 : DTG 中測與後測之最大肌力顯著優於前測 (p < .01)，中測之50毫秒發力率顯著優於前測 (p < .05)。TPG中測的最大肌力、50毫秒發力率、100毫秒發力率及反向跳高度顯著優於前測 (p < .01)，後測的50毫秒發力率亦優於前測及中測 (p < .01)。組間比較發現 DTG 中測的最大肌力進步率顯著優於TPG(p < .01)，但 TPG 後測的 50毫秒發力率進步率顯著優於 DTG (p < .01)。結論 : 7天與14天的DT與TP均能維持前一期阻力訓練之成果。7天 TP 比7天的 DT有更多力量發展的優勢且 14天TP的 50毫秒發力率達最高進步率。故TP策略比DT策略更有利跆拳道選手專項所需的力量表現。  Purpose: The study was to analyze the effect of detraining (DT) and tapering (TP) after 12-week resistant training on the strength performance of adolescent taekwondo athletes. Methods: 22 active male teenage taekwondo athletes who completed 12 weeks of resistance training were selected as subjects, and were randomly assigned to 11 detraining group (DTG) and 11 tapering group. TPG maintains the training intensity and frequency of the "speed and explosive power training period" in the previous training plan, but the training volume was halved. The pre-test was conducted 48 hours after the end of the previous resistance training cycle, and the mid-test and post-test were conducted on the 7th and 14th days after the pre-test. The dependent variables included maximal strength, 50-ms rate of force development (RFD), 100-ms RFD, and the height of countermovement jump. Repeated measured ANOVA and independent sample t-test were used to compare the differences within and between groups. Bonferroni’s method was used for post-hoc comparison if the differences within groups reached a significant level. Results: In DTG, the maximal strength at the mid-test and post-test was significantly greater than that of the pre-test (p< .01), and the 50-ms RFD at the mid-test was significantly better than that of the pre-test (p < .05). In TPG, the maximal strength, 50-ms RFD, 100-ms RFD, and the height of countermovement jump of the post-test were significantly better than those in the pre-test (p< .01), and the 50-ms RFD was significantly greater than the pre-test and mid-test. Between-group comparisons found that DTG was significantly better than TPG in the improvement of maximal strength (p < .01), but the 50-ms RFD at TPG post-test was significantly better than DTG post-test (p < .01). Conclusions: Both 7-day and 14-day DT and TP can maintain the training effect of pervious resistant training program. The 7-day TP could develop more strength than the 7-day DT, and the 50-ms RFD improved the most in 14-day TP. Therefore, the TP strategy is more beneficial to the strength performance required by taekwondo athletes than the DT strategy.