Marathon running is healthy for most—but it can reveal hidden heart issues. Here’s what experts say about strain, AFib, and ...

Heavy respiration during a run may be painful at first, but the strain typically goes away with consistent practice. So there you are, settling into your stride about halfway through a run, when a ...

Chest pain can be caused by anxiety or serious conditions like heart problems—learn how to tell the difference, recognize key symptoms, and know when to seek urgent medical care.

Left-sided chest pain can point to various underlying issues, and although it’s where your heart sits, they don’t all involve the heart. Chest pain in this area could also indicate a problem with the ...

I think we can all agree that running is a relatively low-risk sport. There are minimal hazards, no dangerous equipment, and no contact with other people or players to worry about – and yet, nearly ...