During 45-minute sessions, attendees push through a variety of exercises such as rowing and squats to build strength, agility, and speed

Shed sweat as trainers challenge you with an ever-changing array of exercises designed to make the body functionally stronger

Skilled coaches lead varying levels of workouts designed to burn 500–1,000 calories & focused on cardio, flexibility & core strength

Personal trainer fills one-hour classes with cardio intervals, resistance-band exercises & agility drills set against Boston skyline

Outdoor fitness programs use muscle confusion, swiftly rotating between exercises to burn calories & build strength