Here are three versions of a circuit workout we did last week that simulates load-bearing, equipment carry, and log PT. All you need is a pullup bar, a sandbag and a place to run.
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A fresh approach to cardio exercises

National guidelines recommend adults get at least 150 minutes of moderate-intensity or 75 minutes of vigorous aerobic (cardio) exercise per week. You could meet these goals by exercising at moderate ...