4
1
Targets: Lower body -- glutes, quads, outer glutes, thighs and core.
2
Targets: Legs, outer glutes, inner thighs, quads, core and shoulders.
3
Targets: Legs, glutes, quads, hamstrings, calves, abs, core, shoulders and biceps.
4
Targets: The deep transverse abdominis muscle, oblique muscles, legs, back and shoulders.