Drag that lazy friend with you. Hey you just joined a new team, maybe you need more teammates that friend of yours who is always sitting on the couch complaining how unhealthy they are, is a great candidate.
Even if you just go for a walk, both of you are out doing something healthy and more stimulating than just watching TV. See if you can get them to make the choice to have a healthy lifestyle. Theyâ€™ll thank you for it later.