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05/09/2013 at 5:38 pm #71949
How about checking their eccentric hamstring strength?
When sprinting those distances you put a lot of work into the hamstrings as they try to control the leg and you have a rapid change from concentric to eccentric muscle work.
A recommendation is that you should have 80% in the hamstrings of what you have in the quadriceps.
If these sprints are repeated the muscles get tired and thats when you typically have these injuries and therefore eccentric strength and endurance in the muscles is important.