1. Stand tall with your feet planted firmly on your workout mat with them placed shoulder-width apart
2. Take a large step forward with your right leg into a lunge and allow your left knee to come all the way down to the ground
3. Allow your left foot to lay flat on the floor with your toes pointing out behind you
4. Place your hands on your hips, ensuring they are squared off, and lean into the lunge to activate the stretch
The primary muscles stretched in the Kneeling Hip Flexor Stretch are the Glutes and Hip Flexors.