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Exercise database

Cross-Body Mountain Climber

Cross-Body Mountain Climber is an advanced core exercise that primarily trains the obliques and core, with the shoulders and hip flexors assisting. Equipment: bodyweight.

Library data updated AdvancedBodyweight

What this page is: structured data from Handler's own exercise library — the same cues, mistakes, ranges, and modifications the coach uses in the app. It is general exercise information, not an individual technique assessment or medical advice. Stop any movement that causes pain and seek qualified coaching or clinical care for injuries.

Demonstration loop from Handler's exercise library. Only the still frame loads until you press play.

Technique

Form cues for the cross-body mountain climber

  1. 01

    Exhale gently to set your ribs down before each rep or hold.

  2. 02

    Brace like you are about to be bumped from the side.

  3. 03

    Move slowly enough that your low back position does not change.

  4. 04

    Drive the knee across without letting the shoulders drift behind the hands.

Troubleshooting

Common mistakes

  • Holding your breath the entire time.

  • Letting the low back arch.

  • Moving faster than you can brace.

Programming defaults

Sets, reps, and rest by goal

These are the starting ranges Handler's library assigns to the cross-body mountain climber for each training goal. They are defaults the coach adjusts from your logged sets, not a prescription for any individual.

GoalSets × repsRest between sets
Strength3 × 8–12 reps1 min 15 s
Hypertrophy3 × 10–15 reps1 min
Fat loss3 × 15–25 reps30 s
General fitness3 × 10–15 reps45 s

Between sets

  • Quality bracing beats longer sloppy holds.
  • Stand up or breathe tall between sets.

Working around discomfort

Modifications by body area

How Handler adjusts the cross-body mountain climber when a lifter reports a sensitive area. These are training modifications, not treatment. Pain that persists or worsens needs clinical assessment.

Wrist
Use a neutral wrist position or reduce loading until the wrist stays quiet.
Shoulder
Use a pain-free range and keep the upper arm path controlled.
Hip
Use a comfortable stance and shorten the range if the front of the hip pinches.

Progression chain

Easier and harder variations

Regress to

Progress to

Questions about this exercise

What muscles does the cross-body mountain climber work?
The cross-body mountain climber primarily works the obliques and core. The shoulders and hip flexors work as secondary or stabilising muscles. In Handler's library it is classified as a core movement.
What equipment do you need for the cross-body mountain climber?
None. The cross-body mountain climber is a bodyweight exercise, which is why it appears in Handler's anywhere setups.
How many sets and reps of the cross-body mountain climber should I do?
Handler's default for a strength focus is 3 × 8–12 reps with about 1 min 15 s rest, and for a muscle-building focus 3 × 10–15 reps with about 1 min rest. These are the library's starting ranges, not an individual prescription; the coach adjusts them from what you log.
Is the cross-body mountain climber suitable for beginners?
It is tagged advanced. A simpler starting point in the same progression chain is the mountain climber.

More oblique exercises

Invited TestFlight beta · iPhone-first

Let the coach program the cross-body mountain climber for you.

Handler is our product. In the invited iPhone beta, the coach places exercises like this one into your plan, sets the starting ranges shown above, and adjusts them from the sets you log. Test build, not a public download.

Request beta access