Trying to lose weight?
Muscle tissue is metabolically active. What that means is that it uses energy even in a resting state. Each kg of muscle tissue uses 30 - 50 kcals a day just sitting still.

Also, lifting weights causes you to use more kcals over the next 12-24 hours, as it requires a lot of energy to synthesise the proteins neccessary to repair the damaged tissue (while the effects of cardio-vascular exercise lasts only 2 hours or so). So overall reistence (lifting weights) training is about the best kcal burning exercise there is.

Make sure to incorporate a good weight lifting routine into your exercise plan. This goes for girls too - don't worry, you won't get all big and bulky, ladies, unless you take steroids, as women just don't have high enough testosterone levels to get big just by lifting weights. Lift weights if you want to look like the girls from Eric Prydz "Call on Me" video (I wish my missus did).
(Seance Trumpet has got no beef with a man enjoying a croissant, Wed 18 Jul 2007, 13:44, Reply)