Photo: Nick Anderson of Greenville, N.C., left, his father Rick Anderson and stepbrother Jeramie Mullis pose with the 143-pound blue catfish caught Saturday in Virginia in Buggs Island Lake, also known as the Kerr Reservoir. The previous world record was a 130-pounder caught in the Missouri River last year.
A muscle cramp is a strong, painful contraction or tightening of a muscle that comes on suddenly and lasts from a few seconds to several minutes. It often occurs in the legs. A muscle cramp is also called a charley horse. Nighttime leg cramps are usually sudden spasms, or tightening, of muscles in the calf.
Causes of Back Muscle Spasms Video. A muscle spasm is the body's method of protecting injured structures, or as a means to protect itself from injury. Muscle spasms in the back can be caused by a muscle strain, a sprained muscle, or an underlying condition. 1  Tweet. 2  Print.