The Effect of the Reverse Nordic Curl Exercise on Quadriceps Femoris Muscles Injury Rate Among Soccer Players

Umm Al-Qura University

Status: Unknown

Conditions: Quadriceps Muscle Atrophy; Quadriceps Tendon Rupture; Quadriceps Strained Tendon

Treatments: Other: Usual warm up; Other: Reverse Nordic curl exercise

Study type: Interventional

Funder types: Other

Identifiers

NCT04674072

HAPO-02-K-012-2020-11-480

Details and patient eligibility

About

The reverse Nordic curl is a body-weight exercise which mainly works the quadriceps and hip flexors. It has a large eccentric component, meaning the muscles are working whilst lengthening.

The purpose of this study is to investigate the effect of the reverse Nordic curl exercise on Quadriceps femoris muscles injuries among soccer players.

It hypothesized that reverse Nordic curl exercise has a beneficial effect in terms of Quadriceps femoris muscles injury prevention.

Full description

Description of intervention(s) / exposure The intervention group will be instructed to include the reverse Nordic curl exercise into their warm up 15 to 20 mins before training session (3 times per week) during one season (6 months).

Group sessions will be administered by an exercise physiologist and/ or athletic trainer and/ or soccer coaches and/ or strength and conditioning specialists and/ or physiotherapist.

Session attendance checklists will be used to assess or monitor adherence to the intervention.

The reverse Nordic curl is a body-weight exercise which mainly works the quadriceps and hip flexors. It has a large eccentric component, meaning the muscles are working whilst lengthening.

This is a very simple movement to do, but maintaining strict positioning is vital to get the full benefits. Here's how to do it:

Grab a mat on a soft floor. Kneel down, and sit on top of the feet. If trying this exercise for the first time, place the knees and feet close together, approximately hip-width apart. For more advanced, the feet and knees slightly wider, just outside the hips, to be able to lay back farther without hitting the legs.

Sit up in a tall kneeling position, push the hips forward, and lock the rib cage down. Looking to create a straight line down the front of the body, especially at the hips. This is to create a stretch at the hip flexor muscles.

Lower the shoulders towards the floor by bending at the knee, maintaining the "plank" position previously created. If hip extension is maintained, and the core adequately braced, there should be no strain on the low back, and an intense stretch felt down the front of the legs.

Continue to lean back as far as it is possible to control, then squeeze the quads to return to the starting position (this may not be very far to begin with). It is crucial to NOT let the hips drop backwards at any point during the movement. If they do, the stretch on the hip flexors will be released, defeating the point of the exercise.

Once reaching the floor and back is possible for multiple sets of 10+ repetitions, can begin loading the movement by holding a light plate, kettlebell or dumbbell.

Enrollment: 400 estimated patients

Sex: Male

Ages: 18 to 40 years old

Volunteers: Accepts Healthy Volunteers

Inclusion criteria

• Soccer teams
• Amateur.
• Male .
• Training at least three times per week.

Exclusion criteria

• History of lower extremity injury requiring medical attention in the past 6 months, or systemic diseases, cardiovascular disease, neurological disorders or bone fractures or surgery in the previous year.

Players who joined a participating team after the start of the trial will be excluded.

Trial design

Primary purpose: Prevention

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: None (Open label)

---

400 participants in 2 patient groups

Intervention group

Experimental group

Description:

The intervention group will be instructed to include the reverse Nordic curl exercise into their warm up 15 to 20 mins before training session (3 times per week) during one season (6 months).

Treatment:

Other: Reverse Nordic curl exercise

Control group

Active Comparator group

Description:

The control group will practice their usual warm up. Usual warm up is defined as any basic exercises performed before a performance or practice to prepare the muscles for vigorous actions

Treatment:

Other: Usual warm up