Night cramps are sudden, painful muscle contractions—often in the calves, thighs, or feet—that strike during rest. While anyone can get them, some groups are more vulnerable: Older adults: Nearly 1 in 3 over age 60 experience them, due to reduced elasticity, nerve function, and circulation. Pregnant women: Extra weight, vein pressure, and hormonal changes disrupt electrolytes, making cramps common. Athletes:...