Don Kannenberg is a mild-mannered accountant who busts out of his office on weekends and turns into superman. Kannenberg, 57, of Avon, pursues the extreme sport of obstacle course racing. Competitors ...
This is a great workout if you have a Marine Corps obstacle course available. If not, an outdoor pull-up bar will suffice, or there are other options listed below. We did this one on a holiday when ...
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