Which type of muscle fibers is better for strength and power activities?

Type II muscle fibers, also known as fast-twitch fibers, are particularly well-suited for strength and power activities. These fibers have a greater cross-sectional area compared to Type I fibers, which allows them to generate more force and power during high-intensity, short-duration activities, such as sprinting, jumping, and weightlifting.

Additionally, Type II fibers have a faster contraction speed and a higher capacity for anaerobic metabolism. This metabolic profile enables them to produce energy quickly, making them ideal for explosive movements that require a rapid burst of strength and power. In contrast, Type I fibers, or slow-twitch fibers, are more endurance-oriented, suited for longer-duration activities that require sustained energy over time. Therefore, for tasks that demand quick and powerful muscle contractions, Type II fibers are the optimal choice.