Muscle cramps are severe muscle contractions or spasms generally take place by exhaustion, lack of water, or improper stretching, training, and/or warm-up throughout football practice or match.
Cramps or fatigue can happen when: Na or K levels have dropped (as in a sucking runner with calf cramps) when the temperature switches rapidly (running without accurate warm-up in cold weather).
Cramps can happen when muscles can not loosen sufficiently because myosin proteins do not completely separate from actin filaments.
ATP rates in the skeletal muscle should be sufficiently high to attach to the myosin faces for them to connect or separate from the actin and enable contraction or relaxation; the lack of adequate amounts of ATP implies that the myosin faces remain connected to the actin.
Until the myosin proteins can separate and enable the muscle to relax, the muscle must be able to recover i.e resynthesize ATP.
