Bicycle crunches are a great exercise for building core strength in runners – and are harder than they look. The exercise is a variation of an ab crunch, where one leg flexes while the other ...
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Bicycle crunches: How and why to do them as a runnerBicycle crunches are a great exercise for building core strength in runners – and are harder than they look. The exercise is a variation of an ab crunch, where one leg flexes while the other ...
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