A Quick 30-Second Test That Might Save Your Life Heart Issues often appear without clear warning, but a short self-check can alert you early. In simple terms, it’s a quick way to see how your heart rate reacts to mild effort. The 30-Second Heart Check isn’t a medical test in https://www.diigo.com/item/note/b1gr9/gsc9?k=2d36111f46e8e9c6b1de7b312c26c0aa