The Effect of 6 Week Hamstring Exercise Programs on Hamstring Muscle Strength

Dublin City University

Status: Completed

Conditions: Hamstring Injury

Treatments: Other: Assisted nordic hamstring exercise program; Other: Nordic hamstring exercise program

Study type: Interventional

Funder types: Other

Identifiers

NCT04744194

2019_10_EW/FB

Details and patient eligibility

About

This study aims to compare the effect of two hamstring strengthening programs on hamstring muscle strength in university students. 60 participants will be recruited for this study. They will be randomly assigned to one of two 6-week hamstring strengthening programs, namely the single leg bridge exercise and the Nordic hamstring exercise protocol, and one control group. Eccentric and isometric hamstring strength, gluteal strength and will sprint speed will be measured before and after the intervention.

Full description

Participants will be recruited from the local university sports clubs. Club chairpersons will be asked to send an email to club players. Players interested in participating in the study will be asked to attend a meeting where the study will be explained to them. Those who were interested will then be assessed for inclusion and exclusion criteria.

Group allocation:

A four block randomization method will be used to allocate participants to the Nordic hamstring exercise protocol or the single leg bridge protocol.

Interventions:

The Nordic hamstring exercise program or the single leg bridge program.

Testing procedure:

The eccentric strength of the participants' hamstrings will be recorded before and after the exercise intervention.

A 10 point visual analogue scale will be used to record the level of muscle soreness experienced after each training session.

Enrollment: 38 patients

Sex: All

Ages: 18 to 35 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• free from hamstring injury in the 6 months prior to the study
• currently competing in team sports at least three occasions per week

Exclusion criteria

• history of a hip or knee injury in the 3 months prior to the study
• a history of anterior cruciate ligament rupture
• a history of involvement in a hamstring strengthening, injury prevention programme in the 3 months prior to the study.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Double Blind

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38 participants in 2 patient groups

Nordic hamstring exercise program

Active Comparator group

Description:

Participants are required to kneel on a gym mat keeping their hips in a slightly flexed position and to slowly lower themselves in a controlled manner as far as they could towards the ground. When they can no longer lower themselves as such, they are instructed to utilise their arms to buffer the fall and touch their chest off the ground, while maintaining tension in their hamstrings. Once their chest touches the ground they are instructed to immediately return to the starting position by pushing up with their hands

Treatment:

Other: Nordic hamstring exercise program

Assisted nordic hamstring exercise program

Experimental group

Description:

Participants are required to kneel on a gym mat keeping their hips in a slightly flexed position and to slowly lower themselves in a controlled manner as far as they could towards the ground. During this exercise, participants are attached to a weighted pulley cable system via a chest attachment. A sufficient amount of assistance is given to allow the participant to lower to 30 degrees of knee flexion. When they can no longer lower themselves as such, they are instructed to utilise their arms to buffer the fall and touch their chest off the ground, while maintaining tension in their hamstrings. Once their chest touches the ground they are instructed to immediately return to the starting position by pushing up with their hands

Treatment:

Other: Assisted nordic hamstring exercise program