4
1
Targets: Lower body -- glutes, quads, outer glutes, thighs and core.
2
Targets: Legs, outer glutes, inner thighs, quads + core.
3
Targets: Legs, glutes, quads, hamstrings, calves, abs + core.
4
Targets: Full body — legs, glutes, hamstrings, quads, arms, abs and core.