Comparing the Effectiveness of Stretching Versus Isometric Contraction in Lower Limb Flexibility among Student Randomize Control Trail

Abstract

Background: Flexibility is fundamental for musculoskeletal health and optimal physical performance, especially among students engaged in physical activities. Stretching and isometric contractions are prevalent techniques for enhancing lower limb flexibility, yet their comparative effectiveness remains unclear. Objective: This randomized controlled trial aims to compare the effectiveness of stretching and isometric contraction on improving lower limb flexibility among students, assessing differences in adherence and satisfaction, and exploring influencing factors like age, gender, fitness level, and prior flexibility training. Methods: Twenty-eight undergraduate students aged 18-25 were randomized into two groups: Stretching (n=14) and Isometric Contraction (n=14). Interventions were conducted over eight weeks, with sessions three times weekly, each lasting 20 minutes. Flexibility was measured pre- and post-intervention using the Active Knee Extension, Straight Leg Raise, and Sit and Reach tests. Results: Both interventions showed improvements in flexibility measures, with the Stretching group showing significant enhancements in knee extension and lower extremity functionality (p<0.001). The Isometric Contraction group also showed improvements, particularly in muscle strength and joint stability. However, there were no significant differences between the two groups in terms of overall flexibility enhancement. Conclusion: Both stretching and isometric contraction are effective in improving lower limb flexibility among students. These findings contribute to flexibility training protocols, suggesting that both methods can be beneficial depending on individual goals and physical condition.