Adrenaline increases the "alertness" of the nervous system, meaning it's ready to trigger muscle contraction. It also increases the amount of blood flow and changes the tension of the muscles, which, ...

Infectious agents can cause muscle twitching and spasms, too. The most commonly known is probably tetanus, which causes a phenomenon called lockjaw, where the neck and jaw muscles contract to the ...

While there is no magic bullet for gaining strength, variety is key. To that end, although classic bicep curls often take center stage for building arm strength, another arm exercise deserves ...

The Lying Triceps Extension helps to firm and strengthen the muscles on the back of the upper arm. Any movement that involves straightening the arm will involve the triceps, which consists of three ...

Exercises to tighten batwing arms after 45, with daily band moves and bodyweight work from Jarrod Nobbe, MA, CSCS.

You have 20 muscles in your forearm, the part of your arm between your elbow and your hand. They help you move your arms, hands, and fingers and perform many of the tasks of daily life. You can strain ...

SCULPTING A SET of strong, muscular arms is high among the top priorities guys have at the gym. The big arms ideal is often thought to be a purely aesthetic pursuit—and for some trainees, that might ...

Adding upper-body exercises into your workout routine is essential if your goal is to build strength. Many of us accidentally skip some of the major muscle groups in our backs and arms, but all you ...

Jenessa Connor is a writer with experience writing health, fitness, and nutrition topics for publications, websites, companies, and experts in wellness spaces. Research shows people over 50 can ...