Guy in my team at work just started up his gig making these things. From the same guy who built my 'Bomb Proof Shop Stand'
I've got a prototype, and talk about blasting your legs, core and cardio...even a 'brisk' walk takes on a whole new dimension of training mayhem...
http://www.innovativeperformance.co (yes, its a 'dot co', not a 'dot com')
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