Copenhagen Plank

What it is

A side plank with the top leg resting on a bench and the bottom leg hanging free. It strengthens the adductors and obliques and is used to prevent groin injuries. Bend the top knee on the bench to make it easier.

One side at a time: log each side, and match the reps of your weaker side.

Technique tips

• Place the top leg on the bench
• Lift the hips into a straight line
• Let the bottom leg hang or lift it
• Hold without letting the hips drop

How to track your progress

Log the hold time of each set. Straddly keeps your best hold for this exercise and tells you when you beat it, so a two-second gain does not go unnoticed.