At The Smart Fit Method, we don’t chase fads. We track what matters.
Our training system is built around three of the most powerful, research-backed indicators of long-term health and performance: VO2 max , Leg Strength and Grip Strength
These three markers are central to our Longevity Check—and serve as the foundation for every member’s program.
1. VO2 max: Your Healthspan Indicator
VO2 max is the maximum amount of oxygen your body can use per minute, adjusted for body weight. It reflects how efficiently your heart, lungs, and mitochondria work together to turn oxygen into usable energy.
Why it matters: VO2 max is one of the strongest predictors of all-cause mortality, closely tied to a longer healthspan and reduced risk of chronic disease. Improving it supports better metabolic health, stronger cardiovascular function, and more efficient mitochondria.
At The Smart Fit Method, VO2 max is assessed quarterly as part of your Longevity Check. Members who complete several Norwegian protocols per month often display VO2 max levels equivalent to someone 20–30 years younger.
2. Leg Strength: Foundation for Lifelong Function
We don’t use traditional leg presses. Instead, we use ARX adaptive resistance to capture real-time lower-body output with unmatched precision and safety.
Why it matters: Leg strength is a key predictor of mobility, fall risk, bone density, and metabolic rate. Stronger lower-body muscles are also linked to a reduced risk of cognitive decline as we age. Simply put, stronger legs translate into more functional, independent years of life.
Your ARX leg strength is tracked over time as part of your Smart Strength sessions and visualized in your quarterly Longevity Report.
3. Grip Strength: Your Vital Sign
Grip strength is one of the most powerful predictors of all-cause mortality. It reflects overall neuromuscular health and is closely tied to outcomes such as heart disease, cancer risk, and frailty.
Why it matters: Strong grip strength is linked to lower risk of disability and premature death, while weak grip often signals early aging, cognitive decline, and metabolic dysfunction. It’s a simple test that reveals a great deal about long-term health.
Measured during each LongevityCheck using a calibrated dynamometer.
Why These Three Metrics Matter Most
VO2 max, grip strength, and leg strength together provide a powerful snapshot of overall health. They reflect cardiovascular fitness, muscular strength, metabolic resilience, neurological function, and long-term independence. These are the numbers that truly define healthspan—not just lifespan.
How The Smart Fit Method Improves Them
Marker | Assessment Tool | Training System |
VO2 max | VO2 max / Smart Ride | Smart Ride (Cold HIIT + Oxygen), Norwegian Protocol |
Leg Strength | ARX Adaptive Resistance | Smart Strength training, eccentric overload |
Grip Strength | Hand Dynamometer | Full-body strength work, tracked quarterly |
All three markers are measured every 90 days in your Longevity Check, so your performance is never left to guesswork.
TL;DR – The Smart Metrics That Matter
These three measures reflect how well you’re aging. If you’re not improving them—you’re leaving your future health to chance.
VO2 max = Your body’s ability to consume and use oxygen
Leg Strength = Foundation for metabolic health, mobility, and even brain health
Grip Strength = One of the strongest predictors of long-term mortality and healthspan
Start Tracking the Right Way
Want to know how your VO2 max, leg strength, and grip strength stack up? 👉 Book a Longevity Check Follow us on Instagram for real-time case studies and education.
