Slow-twitch muscle fibers are used when: (1 point) Responses the muscles perform long slow movements the muscles perform long slow movements the muscles perform long periods of activity the muscles perform long periods of activity the muscles perform quick bursts of energy the muscles perform quick bursts of energy the muscles are utilizing protein for energy

Answer 1

Slow-twitch muscle fibers are used when the muscles perform long periods of activity. These fibers are more resistant to fatigue and are primarily utilized for endurance activities.