Slow Twitch Muscle Fibres

Slow twitch muscle fibres contract relatively slowly but can sustain contractions for longer They are useful for endurance activities such as long distance running, cross country skiing or cycling

Slow twitch muscle fibres rely on aerobic respiration to generate ATP and have many mitochondria, a large blood supply and a high concentration of the oxygen storing protein myoglobin The major storage fuel of slow twitch muscle fibres is fats