18 fitness exercises plank ideas

Plank Challenge: The Ultimate Guide to Planks

Take your plank challenge to the next level with our ULTIMATE plank-off! Each day’s moves build up to a weekly Friday Flow combo to get you beach-ready FAST. #plankchallenge #plankoff #summershapeup #makefithappen Master our plank challenge for a seriously stronger core in just one month. Each move is designed to get you in bikini body shape—stat.