Collagen has become one of the most heavily marketed supplements in healthy aging. Here is what the research actually says about its effects on skin, joints, muscle, tendons, and overall health after 50.
VO₂ max is more than a fitness metric. It is a measure of cardiorespiratory capacity and one of the clearest indicators of the physical reserve we carry into later life.
A staircase is more than a way to get from one floor to another. It can also reveal something important about strength, cardiovascular fitness, mobility, and how well we’re maintaining physical capacity as we age.