Stephanie Anderson of Houston helps her son, Matthew, 2, with his helmet at the DEVO Strider Playground on Friday at Rotary Park. Visitors to 2013 Physiology in the Park learned about nutrition, anatomy, heart health, spine health and helmet safety, said Rotem Ishay of Durango Performance Center/Performance Cardiology, the event’s sponsor. Three-time Olympian and mountain biker Todd Wells was the featured speaker. At right is Fort Lewis College junior and exercise science major Payson McElveen, who volunteered at the event.