EverStrongSF

EverStrongSF is a private personal-training studio in San Francisco's Lower Haight built around two ARX (Adaptive Resistance Exercise) machines. Their model centers on twice-weekly 20-minute high-intensity strength sessions: motor-driven resistance with computer-controlled measurement, slow controlled tempo, and zero momentum so that work is concentrated entirely in the muscle.

The studio opened in October 2017 and offers one-on-one bookings with certified trainers.