A calorie isn’t always a calorie. Eating 100 calories of high fructose corn syrup, for example, can have a different effect on your body than eating 100 calories of broccoli. The trick for sustained weight loss is to ditch the foods that are packed with calories but don’t make you feel full (like candy) and replace them with foods that fill you up without being loaded with calories (like vegetables).
well it depends on where you're starting. If you already fit, then running 1.5 in 20 min probably isn't going to do you a whole lot of good. However, if you're really challenging yourself by running 1.5 in 20 then you have potential to lose a little bit of weight depending upon your diet and other life patterns. Weightlifting probably wont be quite as beneficial in terms of losing weight as cardio activity.
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