Hannah Frankson, a Peloton trainer who spends a lot of time working out, says mobility is now a crucial part of her workouts. "The most significant change I've made to my exercise routine as I'm ...

But for many, squats can also feel uncomfortable and challenging. Hannah Frankson, a trainer at Peloton, explains that even for her—with a full-time job exercising—squats haven't always come easy.