Effects of Nordic Exercises on Hamstring Strength and Vertical Jump Performance in Lower Limbs Across Different Sports

Nordic exercises aim to enhance physical abilities and prevent injuries; however, their applicability across different sports remains unclear. This study aims to analyze their effects across various sports disciplines. Objective: To analyze the effects of Nordic exercises on the lower limbs and their relationship with absolute strength and vertical jump in various sports disciplines (football, athletics, basketball, sport climbing, cycling and taekwondo). Method Quasi-experimental study involving 122 athletes (mean age 18±3 years): football (n=24), athletics/speed (n=20), sport climbing (n=20), basketball (n=24), taekwondo (n=14) and cycling (n=20); classified into a control group CG (n=57) and an experimental group EG (n=65). Results: Dominant absolute strength at baseline (12.4±0.51 kg) and post-intervention (14.5±0.98 kg) increased significantly, particularly in basketball (P < 0.05); vertical jump of the initial (42.4±1.2kg) and final (45.8±1.5kg) EG, with a significant difference in all modalities between before and after (p≤0.05), except in cycling and taekwondo; no major changes were found in the GC. Conclusion: Nordic exercises are recommended as part of training to improve levels of vertical jump and vertical jump with emphasis on the modalities of football, basketball, athletics/speed and sport climbing, being applicable to increase absolute strength in basketball.