Background: Horizontal and vertical explosive strength, muscular endurance, flexibility, and speed are essential biomotor abilities for enhancing long jump performance. Regular and well-structured training is essential for improving fitness levels and athletic performance, which extends to improving jumping ability. Objective: The objective of this investigation was to apply scientifically oriented instructional methods and finally to evaluate its impact on both fitness levels and long jump performance. Methods: A parallel true experimental design was employed involving 40 long jump athletes (28 males and 12 females) selected using stratified sampling based on gender. Subjects were divided into an experimental group (EG) and a control group (CG), each with 20 athletes (14 males and 6 females), assigned through simple random sampling. The subjects` age was 18 to 24 years old. The experimental protocol focused on lower body horizontal strength (LBHS), lower body upward strength (LBUS), speed (SP), static muscular endurance (SME), flexibility (FLX), and long jump performance (LJP). The EG participated in supervised training sessions lasting 60 minutes, conducted four days in a week, over a period of twelve weeks. In contrast, the CG did not receive any treatment. This group served only as comparison purpose. A paired sample t-test was used to compare the mean of the pre- and post-tests for six variables in both the EG and CG. Results: The results showed significant improvements in the EG for LBHS, LBUS, SP, SME, FLX, and LJP (p<0.01). In contrast, the CG only indicated a notable variation in SP (p<0.01), with no significant changes in the other variables (p>0.05). An independent t-test of post-test results showed major variations in all variables between the EG and CG (p<0.05), indicating notable improvements in the EG across all measured parameters. Conclusion: The EG demonstrated significant improvements in fitness and long jump performance compared to the CG, showcasing the effectiveness of the 12-week training program. This study highlights the clear benefits of a well-structured and scientifically designed training regimen for long jump athletes. Therefore, incorporating scientifically based training into long jump programs is essential for maximizing athletes` performance and potential.
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