Because my doctor told me to. Note that "lifting weights" is not the same as "body building." What lifting weights does is increases muscle mass, and the medic

Because my doctor told me to. Note that "lifting weights" is not the same as "body building." What lifting weights does is increases muscle mass, and the medical importance of increasing muscle mass is not to get strong but to raise your resting metabolism. Raising your resting metabolism has the effect of managing your weight - even during a long coding session you're burning more calories than someone having a lower resting metabolism. Managing your weight has a huge impact to your health. So...you lift weights to stay healthy, not to get strong.