Your muscles are constantly ripping
This sounds like it hurts, and in some cases it does—the constant tearing of muscle tissue may be why you feel a bit sore after a workout. But, it’s also the key to developing more muscle strength. “Placing stress on muscle tissue, such as when weight training, causes tiny, microscopic tears in the muscle fibers, which are actually needed for muscle growth,” says Erin Palinski-Wade, RD, CDE, author of the book 2 Day Diabetes Diet. “When at rest, the body works to repair and rebuild these torn fibers by fusing muscle fibers together to form myofibrils, or new muscle protein strands, that then increase in number and thickness to create growth of the muscle itself.” Still, you should listen to your body and not overdo it when exercising to prevent injury. Find out other bizarre things exercise does to your body.
Your hair is falling out
If you have long hair, you might worry about how much of it you see clogging up your shower drain—but it’s totally natural for us to shed. “Most of us lose up to 100 hairs from our scalp every day, which is normal,” says family physician Jennifer Caudle, DO, an assistant professor at Rowan University School of Osteopathic Medicine. But according to the American Academy of Dermatology, excessive hair shedding, which may temporarily occur from physical or emotional stress, is different from hair loss, in which the hair actually stops growing. “About 80 million men and women in the United States have hereditary hair loss,” Dr. Caudle says. “But, it’s possible to lose hair if you have certain medical conditions or take certain medicines.” If you think you have excessive hair loss, see your doctor. Read more about the surprising reasons your hair is falling out.