To begin with, imagine you had x ray vision. How many differences would you be able to spot between these two very recognisable athletes?

What type do you think you have a higher proportion of? Can you note down any key characteristics of each type think about the width / shape of each type, the type of contractions they would be good for and their relation to aerobic and anaerobic activities?

Which type of muscle fibre is also known as ‘fast glycolytic’?

Which type of muscle fibre has a moderate aerobic capacity?

Which type of muscle fibre has low myoglobin levels?

Which type of muscle fibre has low levels of myosin ATPase?

During the race, a swimmer has to dive off the starting blocks as quickly as possible. Identify the ‘muscle fibre type’ used to complete this action and justify your answer.

Are world record holders born or made?

Summarise this masterclass using no more than 50 words.

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