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).

Study Overview

• Status: Completed
• Conditions: Muscle Strength
• Intervention / Treatment: Other: Eccentric isokinetic training; Other: Concentric isokinetic training

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 Type: Interventional
• Enrollment (Actual): 30
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Saudi Arabia
  • Riyadh, Saudi Arabia, 11433
    • King Saud University

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 28 years (Adult)
• Accepts Healthy Volunteers: Yes
• Genders Eligible for Study: Male

Description

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 Plan

How is the study designed?

Design Details

• Primary Purpose: Basic Science
• Allocation: Randomized
• Interventional Model: Parallel Assignment
• Masking: Double

Number of Arms

2

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Eccentric isokinetic group; In this group, eccentric isokinetic training of hamstring muscle was performed.	Other: Eccentric isokinetic training; Eccentric exercises of the hamstring muscles were performed with the use of an isokinetic dynamometer device.
Active Comparator: Concentric isokinetic group; In this group, concentric isokinetic training of hamstring muscle was performed.	Other: Concentric isokinetic training; Concentric exercises of the hamstring muscles were performed with the use of an isokinetic dynamometer device.

What is the study measuring?

Primary Outcome Measures

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

Secondary Outcome Measures

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

Collaborators and Investigators

• Sponsor: King Saud University

Study record dates

Study Major Dates

• Study Start (Actual): April 28, 2021
• Primary Completion (Actual): September 13, 2021
• Study Completion (Actual): October 14, 2021

Study Registration Dates

• First Submitted: January 27, 2022
• First Submitted That Met QC Criteria: January 27, 2022
• First Posted (Actual): February 8, 2022

Study Record Updates

• Last Update Posted (Actual): February 24, 2022
• Last Update Submitted That Met QC Criteria: February 8, 2022
• Last Verified: February 1, 2022

More Information

Terms related to this study

• Keywords: peak torque; Isokinetic training; acceleration time; deceleration time; time to peak torque; Hamstring-to-Quadriceps ratio
• Other Study ID Numbers: RRC-2021-11

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No