Redefining Strength is a dynamic fitness channel founded by trainer and strength coach Cori Lefkowith, built around science-backed training, sustainable nutrition guidance, and real-world mindset strategies for lasting transformation. What began as a strength-focused training studio in Costa Mesa, California evolved into a comprehensive online coaching brand with a mission to help individuals — especially women 40 and older — build strength, confidence, and resilience without extremes or quick fixes. Redefining Strength’s YouTube library offers a wealth of content ranging from evidence-based strength training workouts to practical exercise tutorials and lifestyle tips aimed at improving functional fitness, metabolic health, and long-term consistency. With close to 900,000 subscribers and over 100 million views, the channel has become a trusted resource for viewers seeking credible fitness education alongside approachable coaching.