A research group has discovered that certain naturally occurring peptides in the body can trigger contractions in the vas ...

I didn't know I was in labor until my water broke, and I was in full-blown labor at the hospital 6 centimeters dilated within one to two hours." — Alexa S., New York A rock-hard bump "I had them all ...

Creatine boosts energy production by increasing ATP, crucial for muscle contraction and recovery. Protein provides essential amino acids, repairing muscle tissue damaged during exercise and ...

Muscle cramps are the result of continuous, involuntary contractions of a muscle group, a single muscle, or specific muscle fibers. They can be brief, lasting a few seconds, or stretch into minutes, ...

Pump training focuses solely on muscle contraction and increasing blood flow to working muscles. If you're serious about maximizing your muscle pump, make sure to hydrate before your workout to ...

which are described as an uncontrollable or involuntary muscle contraction. These spasms or contractions do not allow the muscle to become relaxed and can become excruciating in some cases.