| muscle: | Lower Back, Rectus Abdominis, Obliques |
|---|---|
| auxiliary muscles: | Glutes, Trapezius, Hamstrings |
| required: | Nothing |
| optional: | Weight Cuffs, Fitness Mat |
| level: | Normal |
| type: | Strength, Plyometrics, Cardio |
Variations Of Jackknife On Exercise Ball
| muscle: | Deltoids, Rectus Abdominis |
|---|---|
| auxiliary muscles: | Pectoralis Major, Trapezius, Obliques, Lower Back |
| required: | Exercise Ball / Bench / Stool / Seat |
| level: | Hard |
| type: | Strength |
| muscle: | Rectus Abdominis, Glutes, Obliques, Adductors, Abductors |
|---|---|
| auxiliary muscles: | Hamstrings, Trapezius, Lower Back, Shins |
| required: | Medicin Ball / Stool |
| optional: | Weight Cuffs |
| level: | Hard |
| type: | Plyometrics |