You need to do both. The amount you lose in weight depends on whether you burn more calories than you take in. The amount you burn is a combination of calories burned through exercise and calories that you burn doing nothing--called your resting metabolism rate. The best way to raise your resting metabolism is to do weight training:squats, push-ups, sit-ups. The treadmill is a ood way to burn calories. You actually burn more fat if you exercise moderately, so that you won t lose your breath. This keeps the exercise aerobic as opposed to anaerobic.
I always do quick start and walk/run. I personally think that running is the best thing to lose some weight. You can also try to increase the incline while you are walking to make it harder and work yur legs more
Speed walking is the best. It gets your heart rate up and isn t bad on your knees.
