Side Bridge
The side bridge, better known as the side plank, has you support your bodyweight on one forearm and the edge of one foot while keeping your torso and legs rigid in one long, level line. It's an isometric hold that targets the obliques and deep core muscles on the side facing down, while your shoulder works to keep you stable through the hold.
Why it works
Your obliques and the deep core muscles along your side exist to resist your torso bending or collapsing sideways, but most core exercises train the front of the abs instead. Holding a side bridge puts gravity directly against that sideways collapse, forcing the obliques and the smaller stabilizing muscles around your spine to fire continuously just to keep your hips from dropping. That's a demand very few other exercises create as directly.
Set up
- Lie on your side with your elbow directly under your shoulder and your forearm flat on the floor.
- Rest one foot directly above the other, or offset them slightly if that feels more stable.
- Rest your top hand on your hip or extend it toward the ceiling.
How to do it
- Push through your forearm and the side of your bottom foot to lift your hips off the floor.
- Keep your torso rigid in one level line, running from the crown of your skull to your ankles.
- Hold the position, keeping your hips lifted and your body from sagging.
- Lower back down with control after your set time is up, then switch sides.
Form cues
- Straight line, head to heels.
- Hips lifted, not sagging toward the floor.
- Elbow stacked directly under the shoulder.
- Look straight ahead, don't drop your head.
Breathing: Breathe steadily throughout the hold; don't hold your breath just because the position is static.
Common mistakes
Letting the hips sag toward the floor instead of staying lifted.
Fix: Actively squeeze your obliques to keep your hips up in line with your shoulders and ankles for the entire hold.
Rolling the top shoulder or hip forward, turning the side bridge into a half-twisted plank.
Fix: Keep your shoulders and hips stacked directly on top of each other, facing straight out to the side.
Placing the elbow too far forward or behind the shoulder.
Fix: Line your elbow up directly beneath your shoulder before you lift your hips, so your shoulder joint stays stable under load.
How to program it
- Since this is a bodyweight isometric hold, two or three sessions a week is plenty to build real oblique endurance.
- Start with two or three holds of 20 to 30 seconds per side and build hold time gradually from there.
- Pair it with a front plank in the same core circuit to train bracing from both the front and the side.
Safety notes
- Stop if you feel sharp pain in the supporting shoulder or wrist rather than muscle fatigue in your side.
- Keep the hold time realistic; shaking or a dropping hip is a sign to end the set rather than push through with bad form.
Exercise profile
- Force
- Static
- Mechanics
- Isolation
- Category
- Strength
Frequently asked questions
How long should I hold a side bridge?
Twenty to thirty seconds per side is a solid starting point. Build up gradually rather than jumping straight to long holds, since form tends to break down before the muscles truly fatigue.
What's the difference between a side bridge and a side plank?
They're the same exercise; side bridge and side plank are two names for the identical position, forearm and foot supporting your bodyweight in a straight line.
Why does my shoulder hurt during side bridges?
This is usually a sign your elbow isn't stacked directly under your shoulder, which shifts extra load onto the joint. Check your elbow position first, and consider shortening your hold time if discomfort continues.