So I have a big friend circle mostly from the tech. Recently, I have observed some interesting patterns. 3 of my friend groups have whatsapp groups for accountability of working out daily and it seriously has transformed couple of people in my group. Also monthly leaderboards seem to be really driving them. Do any of you have experienced similar patterns in your circle? I don't own a fitness trackers so haven't particularly participated in any fitness challenges and I'm thinking if I should get one. Also I'm fairly active person in good shape so I don't feel the need as much. But still open to trying for further improvements, maybe (?)