Unfortunately these things happen sometimes. Unless you investigate though it's all pure speculation. Here's a pro athlete that also died (at age 33) - riding

Unfortunately these things happen sometimes. Unless you investigate though it's all pure speculation. Here's a pro athlete that also died (at age 33) - riding his bike up a hill. https://i.stuff.co.nz/sport/other-sports/76467759/kiwi-mountain-biker-kelly-mcgarry-dies-after-collapsing-on-queenstown-bike-trail https://i.stuff.co.nz/sport/other-sports/76467759/kiwi-mount...