Gian Simmen's snowboard warm-up workout
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Simmen's tip: 'Stretching your back like this helps prevent twisting injuries. Your abs control the move, which builds core strength.'
- Lie facing up, with your arms at 45˚ to your body and your legs together.
- Use your core to lift your legs and lower back off the floor and, in a controlled manner, bring your legs over your head till your toes touch the floor.
- Hold for ten seconds, then bring your legs slowly back to the start.