Devised by Pure Barre founder Carrie Rezabek, these fusion classes balance the grace of dance with the exertion of lifting and the soothing stretch of stretching. Each 55-minute session loosens, strengthens, and lengthens the body through a smooth blend of the ballet barre, weight training, and limbering Pilates. In the process, you'll tone your tush, thighs, hips, arms, and abs; burn fat efficiently; and block out the invasive anxieties of the real world, such as the lingering dread that squirrels are evolving faster than us and will soon top the food chain. Because the Pure Barre workout shuns any jumping or bouncing movement, already overworked and somewhat disgruntled joints will be spared any further stress. Classes are scheduled in the morning and evenings most days of the week.