School of Physical Education , Chongqing Preschool Education College, Chongqing, China.
School of Physical Education, Liaoning Normal University, Dalian, Liaoning, China.
Sci Rep. 2023 Mar 23;13(1):4725. doi: 10.1038/s41598-023-31817-z.
To discuss the effects of 12 weeks of jump rope training on dynamic balance and stroke stability in junior tennis players. Sixteen junior tennis players at CTN7 level were used as subjects and randomly divided equally into ExG and ConG for 12 weeks of training, 3 times a week. The ExG performed Jump Rope training and Special Preparation Activity (JR + SPA), the ConG performed only Special Preparation Activity (SPA) to ensure that the training intensity was basically the same. The Biodex Balance System (BBS) was applied to examine the participants' dynamic balance ability, including the Limits of Stability (LOS) and the Single Leg Stability Test (SLST), the International Tennis Number (ITN) tests ball striking stability. Experimental data were statistically analyzed using independent samples t test, paired samples t test, and repeated measures ANOVA test. We observed significant (P < 0.05) differences in limits of stability (LOS) before and after the test in subjects in the ExG and significant (P < 0.05) differences in ODC, BDC, RDC, FLDC, BLDC, and BRDC metrics in the ExG, and a 2 (group: ExG, ConG) × 2 (time: 0w, 12w) repeated measures ANOVA was performed and found significant (P < 0.05) differences in LDC, RDC, FLDC, BLDC, BRDC, and LOST (S) indexes interacted significantly (P < 0.01) in single-leg stability test (SLST) pre- and post-measures were found in subjects in ExG and in MLSI (L) in ExG (P < 0.05), and 2 (group: ExG, ConG) × 2 (time: 0w, 12w) repeated measures ANOVAs were performed and found that OSI (L), MLSI (L), OSI (R), MLSI (R) interaction on indicators was significant (P < 0.05). The difference in hitting stability between subjects in ExG was significant (P < 0.01) at the pre and post test, while the difference in ConG was significant (P < 0.01) at the pre and post test only on the hitting stability test (depth). 2 (Group: ExG, ConG) × 2 (Time: 0w, 12w) repeated measures ANOVA was performed and found a significant interaction between the two (P < 0.01). We suggest to incorporate Forward double-legged alternating jump rope, Reverse double-legged alternating jump rope, Double-legged alternating cross jump rope, Squatting alternating single-legged jump rope into the regular tennis training course with special techniques, which will help the junior tennis players' dynamic balance ability and hitting stability, and can effectively improve the competitive level of junior tennis players.
探讨 12 周跳绳训练对青少年网球运动员动态平衡和击球稳定性的影响。以 CTN7 级别的 16 名青少年网球运动员为研究对象，随机均分为实验组（ExG）和对照组（ConG），进行 12 周的训练，每周 3 次。ExG 进行跳绳训练和专项准备活动（JR+SPA），ConG 仅进行专项准备活动（SPA），以确保训练强度基本相同。采用 Biodex 平衡系统（BBS）检测受试者的动态平衡能力，包括稳定性极限（LOS）和单腿稳定性测试（SLST），国际网球编号（ITN）测试击球稳定性。采用独立样本 t 检验、配对样本 t 检验和重复测量方差分析对实验数据进行统计学分析。我们观察到 ExG 组受试者在测试前后的稳定性极限（LOS）有显著差异（P<0.05），ExG 组受试者在 ODC、BDC、RDC、FLDC、BLDC 和 BRDC 指标上有显著差异（P<0.05），进行了 2（组：ExG、ConG）×2（时间：0w、12w）重复测量方差分析，发现 LDC、RDC、FLDC、BLDC、BRDC 和 LOST（S）指标的交互作用有显著差异（P<0.01），单腿稳定性测试（SLST）前测和后测的指标有显著差异（P<0.01）。在 ExG 组中，MLSI（L）有显著差异（P<0.05），2（组：ExG、ConG）×2（时间：0w、12w）重复测量方差分析发现，OSI（L）、MLSI（L）、OSI（R）、MLSI（R）指标的交互作用有显著差异（P<0.05）。ExG 组受试者的击球稳定性在前后测均有显著差异（P<0.01），而 ConG 组仅在击球稳定性测试（深度）的前后测有显著差异（P<0.01）。进行了 2（组：ExG、ConG）×2（时间：0w、12w）重复测量方差分析，发现两者之间的交互作用有显著差异（P<0.01）。我们建议将前向双腿交替跳绳、后向双腿交替跳绳、双腿交叉交替跳绳、深蹲交替单腿跳绳纳入常规网球训练课程，并结合专项技术，这将有助于青少年网球运动员的动态平衡能力和击球稳定性，有效提高青少年网球运动员的竞技水平。
