Genetics will play a large part in how the body responds and performs in exercise.
This is largley down to the fact of training for your body type and using it to your advantage.
For example, the majority of sprinters are black African/American as they are genetically predisposed to having the fast twitch muscle fibres which are used for short bursts of speed and strength with high rates of contraction which are needed for sprinting.
Slow twitch muscle fibres which are used for continuous extended muscle contractions over a long period of time are suited to the marathon runner.
So if you match your genetics to a sport or exercise and have the correct training program combined with perfect nutrition you have a winning combination.
If you haven’t already, take a look back at your family medical history to see if there is a risk of heart disease, high BP, diabetes, etc.
If there is, start taking action to decrease your chances of having a condition that will adversely affect your health.
I would recommend that 30 minutes of activity that increases your heart rate and gets you out of breath, 3-5 times per week and you will be fitter, healthier and have an increased quality of life.