Many people are under the misconception that if they are thin they are fit. There are many thin people who have high cholesterol, high blood pressure and are really, not as fit as they think they are. There are some things that you should consider if you want to know just how fit you really are.
When working be wary of the kinds of exercises you are doing in relation to the kind of body you are hoping to maintain. Some exercises are most helpful to people who are trying to burn fat. Some are most helpful to those trying to build lean muscle. Some are best for those trying to build bulkier muscle. Be aware of what the exercises you are doing focus on.
One way to SizeGenetics your fitness routine is to work out with a friend. This will help with positive thinking and also help to push you further than you might have gone otherwise. Humans typically are competitive in nature. This will add a sense of camaraderie and competition to your workouts.