Join O+ to unlock this story. Already have an Outside Account? Sign in All-Access Intro Offer $3.99 / month* World-class journalism from publications like Outside, Ski, Trail Runner, Climbing, and Backpacker. Annual print subscription to Outside Magazine + 2 Gear Guides. Outside Watch – Award-winning adventure films, documentaries, and series. Gaia GPS – Premium backcountry navigation app. Trailforks – Discover trails around the globe. Outside Learn – Expert-led online classes on climbing, cooking, skiing, fitness, and beyond. Join Outside+ Digital + Print Intro Offer $2.99 / month* Annual subscription to Backpacker magazine Access to all member-exclusive content and gear reviews on Backpacker.com Ad-free access to Backpacker.com Join Backpacker *Outside memberships are billed annually. Print subscriptions available to U.S. residents only. 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 Videos Video loading... Alpine Fitness Alpine Fitness: Strengthen Your Knees Share this Facebook Icon Twitter Icon Email Icon Join Backpacker Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Join Backpacker Create a personalized feed and bookmark your favorites. Join for free Already have an account? Sign In Take these tips from Connie Sciolino of the Alpine Training Center to strengthen your knees for big miles.