Primary: Legs (biceps femoris, semitendinosus, semimembranosus)
Secondary: Hip Flexor, Back (iliopsoas, gluteus maximus, latissimus)

With this exercises all parts of the hamstrings are perfectly stretched.

The follwong figure demonstrates the stretching exercise for the harnstrings:

sling-training_Stretching_Oberschenkelrückseite_1.jpg
Suspension Training Stretching Exercise

Holding Position

The upper body is upright. One leg is stretched and attached to the front of the heel and the other
is bent about 90 degrees at the knee. The arms are straight and in an inclined suspensions, the
palms facing each other and the VarioSling is under tension.

Hint

The deeper you lower your glutes, the more intense the stretch in the extended leg. You
can also pull your toes in order to activate the shin muscles.