Dr. Karl Knopf, an author and expert in strength training for older adults, shares invaluable insights on adapting running as we age. He debunks the myth that age is a barrier to strength training, emphasizing that it's never too late to start. They discuss the importance of functional fitness, how poor posture impacts runners, and strategies to prevent muscle loss, like training against sarcopenia. The conversation also highlights tailored strength programs and the critical role of cross-training for longevity in running.