Fit Club Kentlands

Fit Club's Kentlands studio in Gaithersburg, Maryland, is the second location of the Potomac-based 15-minute strength training studio. Sessions are private and led by certified personal trainers on machines that automatically adjust resistance throughout each rep.

Note: Fit Club's website describes adaptive resistance training but does not name ARX; photos on its site show the ARX software interface on the machine's screen. The site lists this location, but its Google Maps listing has no reviews yet, so please confirm that it is open, and confirm equipment, hours and pricing, before visiting.