Answer:
The answer is true. People have two types of skeletal muscles, type 1 which are slow twitch muscle fibres and type 2 which are fast twitch muscle fibres. The slow twitch muscle fibres have a better aerobic capacity and are used in long periods of activities. This type of muscle fibre is dominant in people who carry out long periods of exercise, such as marathon runners. The type 2 are dominant in athletes that rely on quick bursts of energy, such as sprinters.