People sometimes think that lifting heavier weights is only for those who are trying to bulk-up. Well people are sometimes wrong. In fact, gaining muscle mass from lifting heavier weights during workouts speeds up your metabolism. This helps increase your body’s potential to burn fat.
Another reason for heavier weights is tone and definition. Cardio and lots of repetitions at a low weight do help you burn fat, but if you want to sculpt and tone your body a certain way, then you need to think big.
Naturally you shouldn’t start by lifting the heaviest weights you can find. You need to work your way up, starting at a weight you’re comfortable with. But the key here is working your way up. If you stick to lifting the same weight for too long, your body weight might just follow suit.