It is also possible to measure fitness level by own. It would be a good habit if we keep track of our fitness level and carry our own exercise.
What I have found, to measure our own aerobic fitness, at first we need to measure our pulse rate then after walking one mile we have to measure our pulse rate again. The difference will tell us about our aerobic fitness.
Push up can help us to measure the muscular fitness just we need to count the time we are taking to stop or rest and the number of push-ups we did. Sit-and-reach test is a simple way to measure the flexibility of the backs of our legs, hips and lower back.
Not that at all, there is various ways which you may found during your search in various pages according to your interest. But the best way I found is to monitor the progress of fitness level during our own exercise. I have searched in various trainers page and tried to know their training methodology. I have included Fat Loss Life Style for you to check out.