Cross Mountain Climbers (Modified)
The modified cross mountain climber slows the diagonal knee drive to a deliberate step — no jumping exchange, hands elevated on a bench if needed. It keeps the oblique-loading cross-body pattern while stripping out the impact and pace, making it the doorway version for beginners and anyone protecting wrists or shoulders. Coached by Maddy (NASM-CPT) — these are the exact form cues he gives on every client's first week.
Muscles worked
Sets & reps by goal
| Goal | Sets × Reps | Rest |
|---|---|---|
| Strength | 3 × 3–6 per side (3 s pause at the cross) | 60–90 s |
| Muscle | 3 × 9–12 per side | 60 s |
| Endurance | 2–3 × 18–27 per side | 45–60 s |
Rep ranges per Helms 2014 · Schoenfeld 2016.
Level — Beginner
The learning version of the family — and a legitimate tension drill in its own right.
Proper form — 5 cues
- Set your plank with hands on the floor or elevated on a sturdy bench.
- Step one knee slowly across toward the opposite elbow — no hop.
- Pause for a beat at the knee's furthest point under your body.
- Return that foot fully before the other side begins its journey.
- Keep hips level and low throughout — the slowness is what makes that hard.
Breathing: Exhale as the knee crosses under you, inhale as the foot returns.
The 3 mistakes Maddy corrects most
Common questions
Is the slow version actually easier?
Easier on the joints, not necessarily on the muscles. Removing the jump removes impact and coordination demands, which is what makes it beginner-appropriate — but the slow cross with a pause often produces more oblique work per rep than the fast version, because nothing is bounced through. Many advanced trainees use it deliberately for exactly that reason.
Should I elevate my hands or stay on the floor?
Elevating the hands on a bench or step reduces the load on wrists, shoulders, and core all at once — it is the single best regression if any of those is the limiter. Start elevated if a 30-second floor plank is not yet comfortable, and walk the hands lower over the weeks as the plank strengthens.
When do I move up to the fast version?
When you can do 15 slow crosses per side with a one-second pause, level hips, and no wrist complaints — twice through. Then add speed in stages: quicker steps first, the jumping exchange last. The fast version is only worth having when it inherits a plank that does not wobble.
Related exercises
Easier: Mountain Climbers · Harder: Cross Mountain Climbers
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