Your vitamin D levels may decrease as you age, but you can get more vitamin D by spending time in the sun, eating certain foods, and taking a supplement.

A protein called neurofilament light chain (NfL)—studied in humans in the context of neurodegenerative diseases and aging—is ...

A solid metric to know, considering its influence on race performance. Many coaches argue that lactate threshold is one of, if not the, biggest performance predictor. It determines how fast you can ...