Blog
Stair ascent speed: What climbing stairs reveals about functional aging
Stair ascent speed reflects lower-body power, balance, and cardiorespiratory fitness. Learn what stair speed can and cannot tell you about aging.
Walking steadiness: What your score means and how to improve it
Learn what walking steadiness measures, what OK, Low, and Very Low scores mean, and 7 evidence-based exercises to improve balance and reduce fall risk.
Exercise consistency: Why it matters more than intensity (and how to build it)
Learn why exercise consistency beats intensity for long-term health. Discover 8 science-backed strategies to build a sustainable workout habit that sticks.
Lean body mass: What it is, how to calculate it, and why it matters
Learn what lean body mass is, how to calculate your LBM, healthy ranges by age and gender, and proven strategies to build and preserve lean mass for lifelong health.
Movement regularity: Why moving throughout the day beats one workout
Learn why movement regularity matters more than a single workout. Discover the science of daily movement patterns, sedentary breaks, and how to build an active lifestyle.
How much exercise do you really need per day? Science-backed guidelines
Discover exactly how much exercise time you need daily for optimal health. Evidence-based guidelines by age, fitness level, and goal — plus how to track it.
Walking speed: The simple test that predicts how fast you're aging
Walking speed is one of the strongest predictors of longevity and biological age. Learn what your gait speed reveals about your health and how to improve it.
Active calories vs total calories: What the numbers on your watch really mean
Active vs total calories explained: what each number means on your Apple Watch, which one to track, and how your daily calorie burn changes with age.
Endurance score: What it measures and how to improve it
Endurance score estimates sustained aerobic capacity from VO2 max and recent training. Learn the levels, trends, and habits that improve cardio fitness.