Progression I:
Adjust the sling trainer to the length of the centre of the lower leg (when standing). Stand with four feet on the forearms, feet vertically under the attachment point in the slings, looking towards the floor (head in line with the spine). Lift your knees off the floor and hold the position.
Progression II:
Analogue to progression I, but with the upper body supported on the hands.
Progression III:
Analogue to progression I, but with the upper body pushed back slightly with pressure from the shoulders and then returned.
Attention:
Keep your body tense, don't let your hips sag and keep your back straight (for all progressions).
Harden:
The further away your head is from the attachment point, the more challenging the exercise becomes.
Variant:
In progressions I+II, raise and lower your pelvis (don't put your knees down).
