Water: A Hidden Health Issue for Athletes

Athletes often focus on staying hydrated to keep their performance up. They learn how much water to drink during long workouts and hot days. This focus has helped many athletes avoid cramps and keep their energy levels high. But what about the everyday habits of drinking water? Many people, athletes included, do not meet the recommended daily intake. Studies show that up to 40 % of non‑athletes do not drink enough water, and a similar problem exists among athletes. About 58 % of athletes drink less than 35 milliliters per kilogram of body weight each day. Even if their total body water stays normal, these low drinkers show signs of kidney stress. Their urine is more concentrated and they have higher levels of a hormone called arginine vasopressin. This pattern can put extra strain on the kidneys, hormones, and metabolism.Research in regular people links chronic low water intake to problems such as insulin resistance, mild inflammation, and a higher risk of long‑term diseases. It is unclear whether the same risks apply to athletes who also lose a lot of fluids through sweat. Because we do not yet know the long‑term effects, it is important to look beyond short‑term performance. Athletes should consider how much water they drink each day as a health issue, not just a training tool. Scientists need more long‑term studies to see if low daily water intake causes health problems in athletes. They also need experiments that explain how the body responds to chronic dehydration. If we change the focus from only performance to overall health, athletes can make better choices about drinking water. This could protect their kidneys and keep them healthier for years.