Slow Twitch: Long distance (Endurance), Contracts and relaxes for longer and tires slowly, High mitochondria density , Aerobic respiration , High O2 carrying protein density (Myoglobin), Small Glycogen stores, Dark, Fast Twitch: Sprinting (Explosive movements), Contracts, then relaxes rapidly, Low mitochondria density, Anaerobic respiration, Low O2 carrying protein density (Myoglobin), Large Glycogen stores, Light,

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