Throughout the COVID-19 pandemic, many people found themselves scheduling a daily walk to keep their lives more structured. For good reason: The benefits of walking are far-reaching—both for people just looking to get in a few more steps and for those intending to make it a workout. Take Jenna Stern, a Philadelphia-based trainer and founder of the body-positive online fitness studio The Philasophy, who found herself running more mileage than ever earlier this year as a way to cope with pandemic-related stress and the closure of her gym. Soon, though, the whole top of her foot swelled up—she suspects a case of tendinitis from tying her shoes too tightly.