4ZoneTraining.com, anyone use this?
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4ZoneTraining.com, anyone use this?
While researching heart rate zones, I came across this website.
Anyone been here?
Anyone pay the $20 to join?
Anyone think it's worth it?
Thanks!
www.4zonetraining.com
Anyone been here?
Anyone pay the $20 to join?
Anyone think it's worth it?
Thanks!
www.4zonetraining.com