A 10-week randomized trial comparing eccentric vs. concentric hamstring strength training in well-trained soccer...

Area of Science:

• Sports Science
• Exercise Physiology
• Biomechanics

Background:

• Soccer players require strong hamstrings for performance and injury prevention.
• Eccentric hamstring strength is crucial for athletic movements.
• Traditional hamstring curl (HC) exercises are common, but their effectiveness in developing maximal eccentric strength is debated.

Purpose of the Study:

• To compare the efficacy of Nordic hamstrings (NH) training versus traditional hamstring curl (HC) training.
• To assess the impact of a 10-week training program on hamstring muscle strength in male soccer players.
• To evaluate changes in eccentric and isometric hamstring strength and the hamstrings-to-quadriceps strength ratio.

Main Methods:

• Twenty-one well-trained male soccer players were randomized into two groups: NH training (n=11) or HC training (n=10).
• Both programs involved a progressive increase in repetitions and load over 10 weeks.
• Maximal torque for hamstring strength was measured using a Cybex dynamometer before and after the intervention.

Main Results:

• The NH group demonstrated an 11% increase in eccentric hamstring torque and a 7% increase in isometric hamstring strength.
• The hamstrings-to-quadriceps strength ratio significantly increased by 11% in the NH group.
• No significant changes in hamstring strength were observed in the HC group.

Conclusions:

• Nordic hamstrings (NH) training is more effective than traditional hamstring curls (HC) for enhancing maximal eccentric hamstring strength in soccer players.
• A 10-week NH training program can significantly improve hamstring strength and the strength ratio in athletes.
• These findings support the integration of NH exercises into soccer training regimens for improved performance and potentially reduced injury risk.