One can see a lot of people at the gym who are constantly making the same mistakes yet are still hoping they'll achieve their goals.
Here's a list of things that may prevent you from getting in better shape:
1. Too Much Cardio
The treadmill is a wonderful device. It can help you lose weight and get slimmer if you know how to use it. The same rule applies to most other cardio equipment that you find at the gym. If you do too much cardio, you lose muscle. Still having fat yet look skinny simply because you have lost lean mass is not the best idea! Combine cardio with strength training. This is how you'll boost your metabolism and burn fat.