A great look at the "See-Saw" effect.⁠ ⁠ ⁠ During the first move, there's a drift & dip of the front shoulder as the upper half gets out ahead of the lower half.⁠ ⁠ ⁠ Next, the upper half transitions into "stay back" mode, he finds the rear glute, and his head gets loaded over the back hip.⁠ ⁠ ⁠ That first move is important to get the center of mass moving forward. The second move is important to find a stable point from which to rotate through the ground/rear leg, and to get the upper half back

147K views · 237 reactions | I used the Peloton Tread to train for my first 5K. | The Verge | Facebook