Built on excess post-exercise oxygen consumption science developed by exercise physiologist Ellen Latham, Orangetheory Fitness in La Mesa's Grossmont area delivers heart-rate-zone interval training at 8322 Parkway Drive. Each 60-minute class rotates members through treadmill, water-resistance rower, and weight-floor stations while OTbeat monitors stream real-time heart-rate data to overhead screens—a biometric tracking model that contrasts with the circuit-timer format at F45 Training La Mesa on the same Grossmont corridor. Founded in Fort Lauderdale in 2010, the franchise operates over 1,500 studios across 24 countries and merged with the Anytime Fitness parent company in 2024. Triple-certified coaches guide members through five color-coded intensity zones—grey, blue, green, orange, and red—targeting 12 or more minutes above 84 percent of maximum heart rate per session, and the cumulative musculoskeletal load of repeated rowing and treadmill intervals benefits from routine spinal adjustments at The Joint Chiropractic for thoracic-mobility maintenance. Benchmark workouts include timed 500-meter rowing sprints, one-mile treadmill runs, and progressive dumbbell complexes using TRX suspension anchors rated to 350-pound static loads.