![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
![5 minute plank abs, chest, back, workout Training the abs is not an easy task. Not all of these muscles respon… | Buikspieroefeningen, Fitnessoefeningen, Oefeningen 5 minute plank abs, chest, back, workout Training the abs is not an easy task. Not all of these muscles respon… | Buikspieroefeningen, Fitnessoefeningen, Oefeningen](https://i.pinimg.com/236x/37/e1/d6/37e1d64c66cb20fad2b834165deb6dc6.jpg)
5 minute plank abs, chest, back, workout Training the abs is not an easy task. Not all of these muscles respon… | Buikspieroefeningen, Fitnessoefeningen, Oefeningen
![Dr. Subhasree Ray on Twitter: "5-minute plank. In addition to the core, this exercise helps in strengthening the muscles in your back, chest, arms, thighs, and shoulders. Implement in phases. https://t.co/qURugpGAvT" / Dr. Subhasree Ray on Twitter: "5-minute plank. In addition to the core, this exercise helps in strengthening the muscles in your back, chest, arms, thighs, and shoulders. Implement in phases. https://t.co/qURugpGAvT" /](https://pbs.twimg.com/media/FAgeA-wVUAEfZGH.jpg:large)