Rob: I wanna start Get off the couch challenge! Who's with me? I'm gonna start with 30 min of activity every day.
Greg: way ahead of you mate! at least 60 min a day!
Rob: good for you! 30 min a day is gonna be challenging for me!
Greg: good luck then!
Will: don't be too hard on yourself. better to be realistic. fingers crossed!
Anna: i'm in! 30 min sounds reasonable! 
Greg: look for variety of exercises such as walking, biking, swimming whatever you enjoy!
Anna: i'm gonna need lots of support from you guys!
Rob wants to start doing 30 minutes of physical activity every day. Greg is already doing 60 minutes. Anna wants to start exercising just like Rob. 