All my life I’ve been a trained avid runner until the last few years I do it whenever I feel like it which is increasingly rarely. I’m 50 years old now. So suddenly I run 8 miles after not having run for months, and my aging body is like, “You’re hereby punished for your months of laziness! Enjoy these shin splints & frozen painful calves!” And it takes literally 7 days for the pain to go away. How the heck am I supposed to keep running if I’m crippled for 7 days after every run??