![Julie on Twitter: "Plank with PERFORM! Take the 30 Day 5 min Plank Challenge and build up to a 5 minute plank! Who's in?! Show us your progress #ProfilePerform https://t.co/unqzOjRVxR" / Twitter Julie on Twitter: "Plank with PERFORM! Take the 30 Day 5 min Plank Challenge and build up to a 5 minute plank! Who's in?! Show us your progress #ProfilePerform https://t.co/unqzOjRVxR" / Twitter](https://pbs.twimg.com/media/DAeKbr9XoAA33JX.jpg)
Julie on Twitter: "Plank with PERFORM! Take the 30 Day 5 min Plank Challenge and build up to a 5 minute plank! Who's in?! Show us your progress #ProfilePerform https://t.co/unqzOjRVxR" / Twitter
![David Bowie Fitness on Twitter: "30-day, 3 minute Plank Challenge: https://t.co/OODJQAjEnj https://t.co/IZfm2IR8we" / Twitter David Bowie Fitness on Twitter: "30-day, 3 minute Plank Challenge: https://t.co/OODJQAjEnj https://t.co/IZfm2IR8we" / Twitter](https://pbs.twimg.com/media/C9Wnx9DUAAIdaH7.jpg)
David Bowie Fitness on Twitter: "30-day, 3 minute Plank Challenge: https://t.co/OODJQAjEnj https://t.co/IZfm2IR8we" / Twitter
![M on Twitter: "Update on plank challenge: I managed up to one minute by the skin of my teeth while making noises like a cow giving birth and just couldn't get any M on Twitter: "Update on plank challenge: I managed up to one minute by the skin of my teeth while making noises like a cow giving birth and just couldn't get any](https://pbs.twimg.com/media/EYi_9JHXYAEhIRF.jpg)