1. Lay flat on your back on a soft surface
2. Bring your right knee up towards your chest, and hold the position when your thigh rests, or comes close to resting, on your chest
3. Reach both hands around the front of your knee and create a little pulling pressure. You should feel the activation in your glutes and lower back
The primary muscles stretched in the Lying Knee to Chest are the Glutes and Lower Back.