Avoid hot tubs. Optimizing sperm includes: frequent ejaculation, at least twice a week. Avoiding heat exposure, especially immersion in hot water (hot tubs and baths). Stress reduction. Moderate exercise. Vitamin supplements and antioxidants. Minimize alcohol, moderate caffeine. Avoid toxins and radiation.
Live healthy. Lifestyle plays only a marginal role in your sperm count. It is primarily determined by your genetics, hormones and other anatomic or physiologic factors. However, a healthy lifestyle enhances your energy level and your libido, which indirectly benefit your fertility. Avoid daily hot tubbing at temperatures above 100 degrees f.