https://www.rockymountaindevo.com/challenge-page/junior-mountain-bike-off-season-strength 2026-10-20 https://static.wixstatic.com/media/5fc6de_e831920bb8c943918088705b0b2147ea~mv2.jpeg/v1/fit/w_1000,h_800,al_c,q_90/file.jpg junior cyclists on a training ride