Trainer Pete talks about one of the biggest misconceptions with weight loss. Lifting weights and the fear of bulking up. When it comes to increasing muscle size, testosterone is key. Men have 20 to 30 times the more testosterone than women, which is why they can bulk up so noticeably. For women it would require you to do far more weight-lifting than the average woman, plus have some sort of hormone imbalance (either genetic or synthetically induced, as with steroids). In fact, strength training will help you lose weight faster and keep it off in the long run! The more muscle you have the more calories your body burns. Studies have shown that 1 pound of muscle can burn 40-70 calories at rest while one pound of body fat only burns 3 calories a day.