How to do the Side Jackknife
Sets and reps
| Goal | Sets | Reps | Rest |
|---|---|---|---|
| Muscle growth | 3–4 | 6–15 | 1.5 min |
| Muscular endurance | 2–3 | 15–20 | 1 min |
When you hit the top of the rep range on every set, add a rep or a harder variation next session.
Starting points from training research. Stop each set 1–3 reps short of failure.
Muscles worked
Primary
The obliques rotate and side-bend your trunk, and resist both. Side planks, Pallof presses, woodchops and carries cover every job.
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