This podcast was originally recorded in June 2018, six months after Mark's first hip replacement. We are reposting this conversation, which focuses on injury, recovery, and return to activity in light of Mark's second hip replacement, and the fitness lost during a period of idleness enforced by a positive COVID test and seven-week moratorium on surgery imposed by the local hospital system. Michael and Mark speak with Andy Dorais, an E.R. physician who has represented the U.S. in the Ski Mountaineering World Championships, holds the fastest known time on the White Rim Trail near Moab, and once traversed the summits of the SLC skyline: 65 miles and 30,000′ of elevation gain in a single push. Joining them is Brian Harder a physician assistant and endurance athlete (who appeared on Episode 4) to cover the topic of recovery from injury — both guests blew their ACLs last winter — and speak of their different recovery trajectories and return to sport. During the third hour of the podcast Brian and Mark discuss hip replacement and the aging athlete.