What muscles do you need most for a 100m and 200m run??

Question

What muscles do you need most??

Answer 1

TypeIIb muscle fibres.  

Answer 2

You need to work your whole lower body, calves, hamstrings, quads and gluteus maximus for speed. Do so by doing squats, cleans and lunges. Also you need to have strong deltoids (shoulder muscels) to drive you arms. There are three deltoids, frontal, lateral and anterior, work them with push ups and shoulder presses.

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Answer 3

Legs. Most importantly Hamstrings and Quadriceps.