TETSUBridge Mountain Climber (Cross Body) vs Otis Up
The Bridge Mountain Climber (Cross Body) and the Otis Up both train the abs as their primary muscle. The Bridge Mountain Climber (Cross Body) is bodyweight-only while the Otis Up adds external weight to a bodyweight pattern. Here is how they compare and when to pick each.
Side-by-side comparison
| Bridge Mountain Climber (Cross Body) | Otis Up | |
|---|---|---|
| Primary muscle | abs | abs |
| Body part | waist | waist |
| Supporting muscles | glutes, quadriceps, hamstrings, shoulders and triceps | hip flexors and lower back |
| Equipment | bodyweight | added weight |
| Steps in our guide | 7 | 5 |
How each one starts
Bridge Mountain Climber (Cross Body) — first steps
- Start in a high plank position with your hands directly under your shoulders and your body in a straight line.
- Engage your core and lift your right foot off the ground, bringing your right knee towards your left elbow.
Otis Up — first steps
- Lie flat on your back with your knees bent and feet flat on the ground.
- Place your hands behind your head with your elbows pointing outwards.
Full step-by-step guides are linked below.
Which should you choose?
The Bridge Mountain Climber (Cross Body) needs no equipment and scales through leverage, tempo and reps. The Otis Up adds external load to a bodyweight pattern for direct overload. If your gym has both options, neither is a wrong choice: pick the one that feels strongest through a full range, and swap after 6 to 8 weeks to keep the abs adapting.
Full form guides
Common questions
Is the Bridge Mountain Climber (Cross Body) better than the Otis Up?
Neither is universally better — both train the abs as the primary mover. The Bridge Mountain Climber (Cross Body) needs no equipment and scales through leverage, tempo and reps, while the Otis Up adds external load to a bodyweight pattern for direct overload. Choose based on your equipment and which movement you can progress consistently.
Can I do both the Bridge Mountain Climber (Cross Body) and the Otis Up in the same program?
Yes, but usually not in the same session — they overlap heavily on the abs. A common setup is one as your main movement and the other on a second training day, or alternating them block by block.
Do the Bridge Mountain Climber (Cross Body) and the Otis Up work the same muscles?
The primary muscle is the same: the abs. Supporting muscles differ slightly — glutes, quadriceps, hamstrings, shoulders and triceps for the Bridge Mountain Climber (Cross Body) versus hip flexors and lower back for the Otis Up.
Track it in Tetsu
Tetsu tracks both movements separately, keeps your PRs per exercise, and tells you which one is actually progressing. Free to start.