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

Not Applicable

Completed

• Conditions: Muscle Strength

• Registration Number: NCT05229367
• Lead Sponsor: King Saud University

Brief Summary

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).

Detailed Description

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.

Study Timeline

• Study Start: 2021-04-28
• Primary Completion: 2021-09-13
• Study Completion: 2021-10-14
• Study First Submitted: 2022-01-27
• Study First Submitted QC: 2022-01-27
• Status Verified: 2022-02
• Study First Posted: 2022-02-08
• Last Update Submitted: 2022-02-08
• Last Update Posted: 2022-02-24

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 30

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Primary Outcome Measures

Name	Time	Method
Functional Hamstring-to-quadriceps ratio (PTecc:PTcon)	6 weeks	This ratio was calculated using eccentric peak of hamstring and concentric peak torque of quadriceps muscle

Secondary Outcome Measures

Name	Time	Method
Acceleration time of hamstring (AThams)	6 weeks	Time required by hamstring muscle to reach desired velocity was noted.
Acceleration time of quadriceps	6 weeks	Time required by quadriceps muscle to reach desired velocity was noted.
Deceleration time of hamstring (DThams)	6 weeks	Time required by hamstring muscle to reach zero velocity from target velocity, was noted.
Time to peak torque of hamstring	6 weeks	Time required by hamstring muscle to reach peak torque was noted.
Time to peak torque of quadriceps	6 weeks	Time required by quadriceps muscle to reach peak torque was noted.
Deceleration time of quadriceps	6 weeks	Time required by quadriceps muscle to reach zero velocity from target velocity to, was noted.

Trial Locations

Locations (1)

King Saud University; 🇸🇦 Riyadh, Saudi Arabia