NCT07164729

Dynamic vs. PNF Quadriceps Stretching in Cyclists

Comparison of the Effects of Dynamic and PNF Stretching Applied to the Quadriceps Muscle Group on Muscle Performance, Muscle Strength, and Joint Range of Motion in Professional Cyclists

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 30 (actual)
• Sponsor: Istinye University · Academic / Other
• Sex: All
• Age: 25 Years – 50 Years
• Healthy volunteers: Accepted

Summary

Following an initial assessment, 30 professional cyclists will be divided into two groups (1:1). PNF stretching will be applied to the Quadriceps muscles of the participants in Group A, while Group B will perform dynamic stretching on the Quadriceps muscles. After the interventions, all participants will undergo a second assessment. The study aims to compare the immediate effects of these two different types of stretching on muscle performance, strength and joint range of motion. Participants will attend a single day for both the assessments and the intervention sessions.

Conditions

• Sports Physical Therapy

Interventions

Type	Name	Description
OTHER	PNF Stretching	Dynamic stretching of the quadriceps will be performed using walking lunges. This exercise dynamically stretches the quadriceps and hip flexors while also improving balance and coordination. During the exercise, participants stand upright, step one leg forward, and lower their body by bending the knee. They then step forward with the other leg to complete the movement. Ten steps will be performed for each leg.
OTHER	Dynamic Stretching	The "Hold-Relax" technique will be applied. Hold-Relax PNF stretching is based on the principle of isometric contraction of the muscle followed by passive stretching. This technique is effective for increasing muscle flexibility and reducing muscle tension. The medial and lateral parts of the quadriceps will be stretched by Flexion-Adduction-External Rotation and Flexion-Abduction-Internal Rotation patterns3. During the exercise, participants will lie prone with the knee flexed. They will be asked to attempt knee extension while the movement is resisted by the physiotherapist. The contraction will be maintained for 10 seconds, after which the participant will be instructed to relax. Following relaxation, the knee flexion angle will be increased. Ten repetitions will be performed for each leg.

Timeline

• Start date: 2025-09-01
• Primary completion: 2025-10-27
• Completion: 2025-10-27
• First posted: 2025-09-10
• Last updated: 2025-12-03

Locations

1 site across 1 country: Turkey (Türkiye)