Mode Specific Effects of Isokinetic Training of Hamstring on Hamstring to Quadriceps Ratio

Mode-specific Effects of Concentric and Eccentric Isokinetic Training of Hamstring Muscle at Slow Angular Velocity on Functional Hamstrings-to-quadriceps Ratio

Mode specificity of eccentric and concentric isokinetic training have been examined in previous studies but with conflicting results. The present study aimed to examine the mode-specific effects of eccentric and concentric isokinetic training of hamstring muscle at slow angular velocity on eccentric peak torque of hamstring (PTecc), concentric peak torque of quadriceps (PTcon), acceleration time of hamstring (AThams) and quadriceps (ATquad), deceleration time of hamstring (DThams) and quadriceps (DTquad), time to peak torque of hamstring (TPThams) and quadriceps (TPTquad), and functional Hamstring-to-Quadriceps ratio (PTecc/PTcon).

Several studies in past have tried to examine the mode specificity of concentric and eccentric training of different muscles and at different angular velocities i.e. whether concentric training will increase the concentric strength only or both concentric and eccentric strength and whether eccentric training will increase eccentric strength only or both eccentric and concentric strength.

Since conflicting reports are available regarding mode specificity of eccentric and concentric isokinetic training therefore one study was needed that can examine the mode specificity of these training in hamstring muscles at slow angular velocity. The present study aimed to examine the mode-specific effects of six weeks of isokinetic concentric and eccentric training of the hamstring muscle at slow angular velocity on the PTecc/PTcon, AT, DT, and TPT.

Inclusion Criteria:

• Healthy young males
• Age between 18 to 27
• Recreationally active who used to engage regularly in 1-5 hours of physical activity per week

Exclusion Criteria:

• Individual presently indulged in strength training of knee.
• Individuals with any kind of injury around the knee, hip, ankle, foot
• Unconsolidated fractures around the knee. • Stress fractures
• Subjects with the acute phase of trauma, which may interfere with the exercise regime
• Subjects with cardio-respiratory problems and other medical problems like diabetes, asthma, etc.
• Subjects with tendinitis and other inflammatory conditions.