A 15-Minute HIIT Core Workout to Improve Your Endurance and Build Strength

Getting your heart rate up off the road will boost your performance on the road. [View in Browser]( [Runner's World Logo]( [SHOP]( [RW+ EXCLUSIVES]( [SUBSCRIBE]( [A 15-Minute HIIT Core Workout to Improve Your Endurance and Build Strength]( [A 15-Minute HIIT Core Workout to Improve Your Endurance and Build Strength]( Getting your heart rate up off the road will boost your performance on the road. [Read More]( [Hop Into Fitness With The 8 Best Jump Ropes]( [Hop Into Fitness With The 8 Best Jump Ropes]( These speed and weighted jump ropes will boost your cardio, improve your balance, and burn calories. [Read More]( [The Boulder Running Community Bands Together in the Wake of the Marshall Fire]( [The Boulder Running Community Bands Together in the Wake of the Marshall Fire]( After the blaze destroyed 6,000 acres, local running entities are accepting donations to help those impacted in the community. [Read More](   [Alicia Monson and Shadrack Kipchirchir Win U.S. Cross-Country Championships]( [Alicia Monson and Shadrack Kipchirchir Win U.S. Cross-Country Championships]( Monson won decisively; the men’s race came down to a sprint finish. [Read More]( [Want to Have a Long Running Career Like Nick Willis? Here’s What to Focus On]( [Want to Have a Long Running Career Like Nick Willis? Here’s What to Focus On]( On New Year's Eve, the two-time Olympic medalist from New Zealand narrowly missed breaking 4 minutes in the mile for the 20th year in a row. [Read more]( [Puma Continues Investment in American Women’s Marathoning With Three New Athlete Deals]( [Puma Continues Investment in American Women’s Marathoning With Three New Athlete Deals]( The company made a splash with Olympian Molly Seidel. Now it has four of the 10 fastest U.S. women from 2021. [Read More](   RW SHOP The Latest from the Runner's World Collection [Shop Now]( [Shop Now]( [Shop Now]( [Win a Brand New Home Gym ($1,500+ Value)!]( Follow Us [Unsubscribe]( | [Privacy Notice/Notice at Collection]( RunnersWorld.com ©2022 Hearst Magazines, Inc. All Rights Reserved. Hearst Magazines, 300 West 57th Street, New York, NY 10019