No doubt, there's only so much room at the top, and only so much available shelf space. It'll all come down to reviews, ie; who reviews it and what they say.
I guess the key in that sense would be to get the product out to all the top sports and fitness writers and hope they write rave reviews.
Athletes are always looking from that edge. From the pro all the way down to the beer leaguer. If it works or is better than the others than it will sell hard