There is an old, unspoken weight that sits on a man’s shoulders the moment he realizes his body is no longer a self-sustaining engine of infinite output. In our twenties, we treat our vitality like a trust fund we’ll never exhaust. We skip sleep, eat like scavengers, and assume the machinery…

In Brief Male fertility depends on sperm count, quality and a healthy hormonal environment. Training, nutrition, sleep, stress and substance use all shape your fertility over time. Heat exposure, steroids and heavy drinking can quietly weaken sperm production. Most lifestyle changes need…