Crunches are a waste of time for a defined core. Instead, try this dynamic move. From a high plank, engage your abdominals and keep your back flat. Rapidly drive your knees towards your chest in an explosive, alternating motion. This targets your entire core, including deep stabilizers. 🔥 Send this to a friend who's still doing 100s of crunches. . . . #fitness #coreworkout #mountainclimbers #abworkout #hiitworkout #corestability #plankvariation #fatburningworkout

3 reasons this move helps chronic lower back pain: 1) Fires up your deep core stabilizers. 2) Boosts glute & quad activation. 3) Increases full-body coordination. 🤸‍♀️ This is how you build a resilient core and protect your spine. Send this to your workout partner! #coreworkout #mountainclimbers #abexercises #partnerworkout #corestrength #hiitworkout #fitnessmotivation