Performing faster repetitions with lighter weights typically increases what?

Performing faster repetitions with lighter weights primarily focuses on increasing contractile speed. This approach emphasizes the rate at which muscles can contract during movement, enhancing their performance and improving overall muscular power. By utilizing lighter weights and speeding up the repetitions, the muscles must adapt to the quicker demands, thereby boosting their ability to contract rapidly.

This training method effectively engages the fast-twitch muscle fibers, which are responsible for generating quick bursts of strength and power, contrary to slower, heavier lifting that tends to favor strength and muscle size instead. Therefore, when the goal is to enhance the speed of muscle contractions, focusing on lighter weights and faster repetitions is an optimal strategy.