I have three questions, perhaps you guys can help: 1) Is jumping rope any good? It's a lot of fun and I was wondering how jumping rope will affect the body. Is it good for the legs perhaps, and burns calories at the same time? I want more muscular legs and get rid of some fat as well. 2) My workout plan is lifting weights for 45 minutes every second day (I'm a newbie). I also run 20 minutes at the end on a stationary bicycle after the workout. Can I bicycle every day to burn more fat, or is it better to keep going with the 45 min. workout + 20 min. bicycle plan? Some say it's pointless to work out the same muscles every day, because they need a day of rest, that's why I'm asking. 3) When is it ideal to do sit-ups? During the workout session, before bed, right after standing up and so on? Thanks.