Bear to Crab Switch Through
Bear crawl into a crab position with one leg passing through under the body — a flowing dynamic mobility staple from animal flow practice.
Level: Beginner
Primary: Cardio Full Body
Movement: Compound
Tags: Animal Movement
Type: Anaerobic Intervals (HIIT / Bootcamp / Circuit) Functional Fitness (Obstacle & Hybrid) Primal Movments (Animal Flow-QMT Specifics)
Equipment: Body Weight
Sports: Boxing MMA
Target muscles
The trunk muscles work continuously through the rotation and the leg pass-through — the obliques especially fire hard to control the asymmetric rotation. The hip flexors of the passing leg lift the knee through under the body; the contralateral glute holds the supporting hip stable. The shoulders, rotator cuff, and serratus anterior cycle through a large range of motion under load. The triceps support the crab position; the anterior deltoids hold the bear position. Total-body coordination and mobility under continuous load — closer to skill work than to strength training.
How to perform
Setup
Start in a bear crawl — hands under shoulders, knees hovering. Pack the shoulders, brace the trunk.
Execution
Lift one hand and the opposite-side knee off the floor and pass the leg through under the body — the kicking leg sweeps across and through, landing on the opposite side. As the leg passes, the body rotates open into the crab position with hips lifted, chest open, hands and feet supporting. Pause briefly in the crab. Reverse the motion to return to bear crawl — the same leg sweeps back through to land on its original side. Alternate sides on each rep, or repeat one direction for the full set.
Common mistakes
- Letting the hips touch the floor during the pass-through. The trunk holds the body elevated.
- Rushing the leg sweep. Slow control is the training stimulus.
- Stopping in the middle of the rotation without committing to the crab position. Open up fully — chest to the ceiling, hips lifted.
- Same-side hand and leg lifting (collapses the rotation pattern). The opposite hand stays planted; the opposite-side leg sweeps through.
- Holding the breath. Inhale on one direction, exhale on the return.
Progressions and regressions
Regress to the bear crawl hold and crab walk hold as separate positions, then work the bear-to-crab rollover (no leg pass-through) until smooth. To progress, work the full sequence faster (more cardiovascular demand), add a brief shoulder tap in the crab position, or chain multiple animal-flow transitions (bear-to-crab to side plank to scorpion reach).
Programming notes
Excellent in dynamic warm-ups (3-5 transitions per side), animal-flow sessions, or as conditioning intervals (30-60 seconds of continuous flow per round, 4-6 rounds). Two or three times a week. The mobility and coordination work pairs well with traditional strength training; programming after the main lifts as a cooldown movement integrates nicely.
