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I've only recently got myself into running and have a question...
I've started on a "Couch to 5K" program, however, I'm using a treadmill and have no idea what speeds my 'walk' and 'run' should be?
I've been kind of going with 'whats natural' but I don't want to be overdoing it nor underdoing it...could use some advice!
Many thanks in advance,