Promotional graphic for the MVP Challenge: large text reads “MVP CHALLENGE,” followed by “A 4-week fitness challenge where every rep matters—build strength, push limits, and help fight children’s cancer.” A blue “Get Started” button appears beside a photograph of a gray-haired man in a gym.

Fitness expert and celebrity trainer Gunnar Peterson has launched the MVP Challenge on his app, Common Ground, to raise awareness and funds for pediatric cancer efforts at Monroe Carell Jr. Children’s Hospital at Vanderbilt in honor of his daughter Monroe. The fitness challenge is free to join and is taking place over the next four weeks. Click here to join.