i am new here - how do i get involved with a "challenge"?

Hello Sunshine,,,Just send a message to one of the lead people of the team you'd like to join and they will get back to you. I believe they try to keep the teams a little even so you will get put on one of them but maybe not the first you try for....I really recommend you go for it. The support and teamwork is really motivating. Like being on the Biggest Loser!

you had suggested contacting the leaders - who would the leaders be?