It is important to be physically fit to maintain a healthy reproductive system. If you are unfit you will have a lowered metabolism rate, which in turn affects your health, causing fertility problems.
Studies have shown that overweight men have reduced semen quality. Physical activity increases your blood flow to sexual organs and helps re-balance reproductive hormones. This promotes sperm cell production and improves sperm count and quality.
There is growing evidence to support a link between what we eat and semen quality. Sperm are vulnerable to attack from oxidative stress as well as other toxins in our diet, which can affect sperm motility, count and morphology.
More importantly, sperm function and genetic integrity may also be affected. Recent studies have shown that a well balanced diet rich in antioxidants and polyunsaturated fatty acids can help protect sperm and improve fertility.