Phosphorus, 24 hr Urine

This test measures how much phosphorus your body is excreting over 24 hours, reflecting your dietary intake and kidney handling of this essential mineral. It helps assess phosphorus balance, kidney function, and metabolic status when abnormalities are suspected.

Not especially athlete-specific. While phosphorus is critical for ATP production and muscle energy metabolism, 24-hour urine phosphorus is rarely used to optimize athletic performance or training. It's primarily a clinical tool for diagnosing kidney disease or severe mineral imbalances—concerns that would warrant medical attention before intense training.