Exercise guide
90 To 90 Switch
- Intermediate
- Compound
- Rep-based
- Lower legs
- Upper legs
- Waist
The 90/90 switch is a dynamic mobility and stability exercise that improves hip internal and external rotation while engaging the core and glutes to stabilize the pelvis.
Reviewed by the Crucible team · Updated June 2026
Muscles worked
Setup
- Sit on the floor with your front leg bent at a 90-degree angle in front of you, shin parallel to your chest.
- Position your back leg out to the side, also bent at a 90-degree angle, with the knee aligned with your hip.
- Sit tall with your torso upright; place your hands on the floor behind you for support if needed.
How to do it
- Inhale to brace your core, then lift both knees off the floor while keeping your heels pinned to the ground.
- Rotate your hips through the center, pivoting on your heels until your legs reach the opposite 90/90 position.
- Exhale as you lower your knees to the floor on the new side, ensuring both knees maintain their 90-degree angles.
- Repeat the movement in the opposite direction, alternating sides with a slow, controlled tempo.
Form checklist
- Keep your chest lifted and avoid rounding your lower back.
- Maintain a 90-degree angle at both the knees and the hips.
- Keep your heels in contact with the floor throughout the entire rotation.
- Minimize torso leaning by using your obliques to stay upright.
Pro tips
- At the end of the switch, actively drive the trailing knee into the floor to maximize internal rotation and glute engagement.
- Imagine your pelvis is a bowl of water; try to keep it level as you rotate to maximize hip isolation.
Make it harder
- Perform the switches with your hands off the floor (arms crossed or reaching forward) to increase core and hip demand.
- Add a hip extension by driving your hips forward into a tall kneeling position once you reach the end of each switch.
Frequently asked
- What muscles does the 90 to 90 switch work?
- The 90 to 90 switch primarily targets the abs, glutes, obliques, and quadriceps, and also works the hip flexors as secondary muscles.
- What equipment do you need for the 90 to 90 switch?
- The 90 to 90 switch requires no equipment — just your body weight.
- Is the 90 to 90 switch good for beginners?
- The 90 to 90 switch is rated intermediate. Build a base with simpler variations first, then progress to it with light load and strict form.
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