Can a workout be done at a desk, or sitting on a plane? Isometric exercises are a way of exercising while staying in a seat or waiting in line at the store.
Isometrics are not a substitute for traditional exercise, but is a way to fit in a few exercises in only a few minutes to strengthen the muscles.
Some simple isometric exercises include pressing the palms together as hard as possible for a minute, tightening the abdominal muscles, and pulling the shoulders back while straightening the spine, which also helps posture. There are many different types of isometric exercises which can be performed.