The hardest sport is often debated, but boxing stands out due to its combination of intense physical conditioning, mental toughness, and high risk of injury. Athletes must endure grueling training and stay sharp under pressure in the ring. Other tough sports include MMA, gymnastics, and rugby, each demanding exceptional strength, endurance, and focus. Ultimately, the hardest sport var... https://letsgotennis.com/sports/hardest-sports/