Unlock this article and unwrap savings this holiday season.
Already have an Outside Account? Sign in
Now 30% Off.
$4.99/month $3.49/month*
Get the one subscription to fuel all your adventures.
- Map your next adventure with our premium GPS apps: Gaia GPS Premium and Trailforks Pro.
- Read unlimited digital content from 15+ brands, including Outside Magazine, Triathlete, Ski, Trail Runner, and VeloNews.
- Watch 600+ hours of endurance challenges, cycling and skiing action, and travel documentaries.
- Learn from the pros with expert-led online courses.
*Outside memberships are billed annually. You may cancel your membership at anytime, but no refunds will be issued for payments already made. Upon cancellation, you will have access to your membership through the end of your paid year. More Details
Video loading...
Alternating Back Kick
Stand with your feet hip-width part with your elbows bent and your hands just below your chin. Perform a shallow squat, then as you extend your legs, kick one foot forcefully straight back behind you with your foot flexed, leading the motion with your heel. Return to the start and continue, alternating sides.