Women-owned hybrid training studio founded in 2017 around a signature Hybrid8 class format combining 45 minutes of HIIT circuits with 30 minutes of restorative yoga in a single session, Liber8Fit Underground operates from 1825 El Cajon Boulevard in 92103. The format merges strength output and breath-based recovery inside one booking window, a compressed programming structure distinct from the separate asana-only classes run at Radiance Yoga Center Inc. Classes pair deadlifts, pull-ups, and near-total-exertion circuits with pranayama breathwork and savasana cooldown, coached by trainers cross-trained in both modalities. The studio sits on the Hillcrest–University Heights border across from the commercial stretch of El Cajon Boulevard. The small-group hybrid model contrasts with the one-on-one private-coaching structure used at Angeles Athletics SD for clients choosing between group-accountability and solo-programming formats. Active8 cross-training sessions stack the highest-volume conditioning block on the schedule for members preparing for obstacle races or hybrid-athlete events.