I've always loved gym classes - you know, the kind where you lift heavy weights and get your heart rate up. Something about being in a gym, for me, motivates me to push myself and smash my workout.
I'll admit this isn't the norm, in my friendship circle at least (most of my friends much prefer home workouts or getting a sweat on from the comfort of their homes). But for me, there's nothing more empowering than plugging in my headphones, ignoring the world and lifting heavy weights in a dedicated gym or studio.
