HOTWORX - Manchester, NH

HOTWORX in Manchester serves New Hampshire’s largest city with infrared cabins built for exercise rather than rest.

Manchester grew around the Amoskeag Manufacturing Company, once the largest cotton mill complex in the world — a mile of red brick along the Merrimack employing seventeen thousand people. Its collapse in 1935 shaped the city for decades, and the millyard’s conversion to offices, restaurants and a university campus counts among the more successful post-industrial reinventions in New England.

The HOTWORX format runs a guided workout inside a heated infrared cabin, from video, alone, for fifteen to thirty minutes. Yoga, pilates, cycling and isometrics are the usual options.

Heat acclimation is real and produces documented endurance adaptations. The stronger marketing claims around calorie burn and detoxification are not well supported, and exercising at temperature carries genuine cardiovascular demand — medical advice first if that is a concern, and hydration matters more than usual.

Manchester sits off I-293 with parking throughout. Membership includes 24-hour access with app-based booking.

Manchester’s position on I-93 and I-293 makes it reachable from across southern New Hampshire, and the city has the largest population base in the state by a wide margin.