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==Active Recovery/Easy Days==

What about 'active recovery'? I've only found one scientific study <ref name="neuro"/><ref name="Active"/> and that indicated that active recovery does nothing to help. On the other hand, it did not indicate that active recovery does any damage either.

* 'Active Recovery' can refer to doing low intensity exercise between the work periods of [[Introduction to Interval Training|Interval Training]], which is effective.

* Doing gentle exercise immediately after intense exercise (the cool down) may have some benefits. There is anecdotal evidence that walking for 20-30 minutes after a long run reduces muscle soreness.