Fitness experts weigh in on the differences between concentric vs. eccentric exercise, and why both are important.

Concentric vs eccentric vs isometric training: Benefits Focusing on all three phases of movement can help you build strength, muscle, power and control during exercise.

Eccentric, concentric, and isometric phases are all distinct parts of most exercises you do in your workouts. Here's what they mean and how to use them.© miljko - Getty Images ...

Learn the difference between eccentric and concentric exercises, how each impacts your muscles, and which moves to try for strength, size, or injury prevention.

Learn the difference between eccentric and concentric exercises, how each impacts your muscles, and which moves to try for strength, size, or injury prevention.

Isometric vs concentric vs eccentric These three classifications relate to what the muscle is doing when being activated.

Eccentric exercise involves focusing on movements that lengthen the muscles, such as when lowering into a squat. This can build strength.

Learn about the concentric and eccentric phases of your workout—and why these workout stages are important.

Eccentric exercise involves lengthening muscles which increases size by adding stress. Concentric moves shorten muscles for gains with less soreness.

Eccentric, concentric, and isometric phases are all distinct parts of most exercises you do in your workouts. Here's what they mean and how to use them.