Why stretch ?
Stretching tenses your muscles or muscle groups by lengthening them. Stretching helps to improve joint flexibility and avoid musculotendinous injuries.
Coach's advice: Without moving the leg in front and keeping your back straight, push your pelvis towards the ground. If you can't feel a stretch at the front of your right thigh and at your hips, gently push your right leg back until you feel a pull.
KALENJI & OXYLANE RESEARCH suggest:

1) Kneel down with your left leg in front of you, the knee bent at a 90° angle.
2) Push your right leg behind you with your knee on the ground.
3) If you can't feel a stretch in front of the right thigh and at your hips, push your right leg back until you feel a pull.
4) Hold the position and then switch legs.
Enjoy your stretch!