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MediumAbout 4 minOn your own
A dead bug while pulling a band down with straight arms. The pull switches on the back and makes the trunk work harder.
Video: Muscle & Strength
Also: Band round the foot
Lie on your back with your head towards a low anchor point. Hold the band with straight arms above your chest, hips and knees bent at 90 degrees.
You need: A resistance band anchored low behind your head
Do not straighten the leg fully.
A stronger band or slower reps.