Research Article
Experimental Study on the Influence of Unilateral and Bilateral Plyometric Training on the Lower Limbs Explosive Power of Male Students in Junior High School
Yu Wang*
,
Yuxiu Jiang,
Xiaoyu Wang
Issue:
Volume 10, Issue 4, December 2025
Pages:
155-162
Received:
9 February 2025
Accepted:
24 February 2025
Published:
9 October 2025
Abstract: Purpose: Plyometric training is effective for improving the lower limbs explosive power of athletes, but less is known regarding if male students in junior high school equally benefit from plyometric training. The purpose of this study was to compare changes in male students’ lower limbs explosive power across plyometric training. Method: A sample of students (45 males) in junior high school was cluster randomly assigned to the conventional lower limbs explosive power training group (CLT), the bilateral plyometric training (BPT) and the unilateral plyometric training group (UPT). Pre-tests were conducted on the basic information and five explosive power indices of 45 participants across three groups, followed by post-tests on the experimental indices after the experiment. Subsequently, one-way ANOVA was performed among the three groups for the pre- and post-test data, and paired-samples T-tests were conducted within each group. Results: There were significant differences in the five lower limbs explosiveness test indexes between the three groups and those after the experiment (P<0.01). Conclusion: After an eight-week experiment, UPT BPT and CLT can effectively enhance the lower limb power levels of ordinary junior high school male students. UPT group was better than that of the BPT group and the CLT group in the 50-meter run and 20-meter hop jump index. BPT group was better than that of UPT group and CLT group vertical jump and triple leap frog.
Abstract: Purpose: Plyometric training is effective for improving the lower limbs explosive power of athletes, but less is known regarding if male students in junior high school equally benefit from plyometric training. The purpose of this study was to compare changes in male students’ lower limbs explosive power across plyometric training. Method: A sample ...
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Research Article
Clarifying the Innovation Value of Sports Policy by Network Analysis: Adding the Case of Shohei Ohtani’s Two-way High Performance
Issue:
Volume 10, Issue 4, December 2025
Pages:
163-170
Received:
11 September 2025
Accepted:
19 September 2025
Published:
17 October 2025
DOI:
10.11648/j.ijsspe.20251004.12
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Abstract: This study is an empirical study on sports policy. To explore the social value of future sports policy, we extracted key concepts from literature summaries. We used a co-occurrence network analysis to qualify items with a high frequency of occurrence from more than 100 international papers concerned sport policy since 2020. From a total of 28,417 terms, the relationship between “growth”, “culture”, “model”, “country”, “environment” and “SDGs” was extracted as policy structures related to sports policy. In addition, using time series grouping from the past to the present and the future (correspondence analysis), more strategical concrete activities and organizational coordination were oriented. It suggested innovative policy developments in the future. Next, to clarify the modern characteristics of a sports model, we discussed the policy development of MLB Shohei Ohtani's two-way challenge (pitcher and batter). A new model of sports innovation supported by sports medicine and science (performance analysis) might have been proposed. The emergence of sports performances beyond preconceived notions might be due to a policy shift from an athlete-first perspective to past policies. We would like to discuss the possibility that innovation could be generated through mutual aid rather than competitive elimination. It could be a consideration of the social values generated by altruism or coexistence.
Abstract: This study is an empirical study on sports policy. To explore the social value of future sports policy, we extracted key concepts from literature summaries. We used a co-occurrence network analysis to qualify items with a high frequency of occurrence from more than 100 international papers concerned sport policy since 2020. From a total of 28,417 t...
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