Side to Side Crunch
The side to side crunch is a bodyweight exercise that targets the obliques through lateral flexion. Alternating the crunch direction to each side creates a comprehensive oblique workout that improves lateral core strength.
How to do it
- Lie on your back with your knees bent and feet flat on the floor.
- Place your hands behind your head with your elbows pointing out.
- Curl your upper body up and to the right, bringing your right elbow toward your right knee.
- Lower back to the starting position and repeat to the left side.
- Continue alternating sides for the desired number of repetitions.
Form cues
- Keep your lower back pressed gently into the floor.
- Lift your shoulder blades off the ground using your core.
- Reach your hand toward your heel or ankle on each side.
- Move slowly and control the descent back to the center.
Breathing: Exhale as you crunch up and to the side, and inhale as you return to the center.
Common mistakes
- Pulling on the neck with your hands, which can cause strain instead of working the obliques.
- Rushing through the movement using momentum rather than muscle control.
- Holding your breath, which prevents proper core engagement and raises blood pressure.
Muscles worked
Primary: obliques. Secondary: abs, hip flexors.
Suggested sets & reps
Get fitter
3 sets x 12-15 reps per side, rest 60 seconds
Lose weight
3 sets x 15-20 reps per side, rest 45 seconds
Build muscle
3 sets x 10-15 controlled reps per side, rest 60 seconds
Easier, harder & alternatives
Take care if…
- If you have neck or lower back discomfort, ease off or choose a gentler option.
General educational guidance, not medical advice. Stop on sharp pain and check with a qualified professional if unsure.
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Start free →Frequently asked questions
Will side to side crunches spot-reduce belly fat?
No single exercise can target fat loss in one specific area. This movement strengthens and tones the oblique muscles underneath.
Why does my neck hurt when I do these?
Neck pain usually happens when you pull on your head with your hands. Support your head lightly with your fingers and lift with your upper chest.
How often should I do core exercises?
Doing core work 2 to 3 times per week allows for adequate muscle recovery while building strength over time.