AS YOU MOVE ALONG THE PATH to fitness, it is important to remember that your personal physique will respond to exercise in its own unique way. In truth, there is only so much you can do to change what you are born with; your body type, your VO2max to some extent and of course, gender are some things that are impossible to change through exercise. Keep in mind the limitations imposed by nature as you begin exercising as well once you have been exercising regularly
Some things you can’t change 
Fitness is an individual quality that varies from person. It is influenced by age, sex, heredity, personal habits, and eating practices. Exercise can make anyone more fit, but it will affect everyone bit differently. Every body will respond in a unique way. Don’t compare yourself with anyone else, even if it is your workout partner and you are doing all the same workouts. There are some thing we can’t change. There is the VO2 max, for example-we can raise it to some extent, but everyone has a different threshold. Some people naturally have higher VO2 maxes than others.
Also, you may have noticed that some people seem to be able to eat whatever they want and not gain any weight, while others eat salads but can’t get rid of a stomach paunch. Some people have naturally higher metabolisms than others. Be aware of that and don’t get discouraged.
It can be frustrating when someone who hasn’t been working out at all can lift more weight than I can, but it just makes me want to try harder.
Gender role in fitness
There have been many discussions and arguments about the differences between men’s and women’s capacities for fitness. Fortunately, many old myths claiming that it is unhealthy for women to exercise have been dispelled. Women were banned from running marathons for many years, for example, because people thought that long distance running could displace the uterus, or cause women to develop large manly muscles.
