If we could keep only one lifestyle ingredient, this would be it. Nothing else on the list moves the odds of living well as far as movement does — and it does so in two distinct ways: the aerobic engine that carries oxygen, and the muscle reserve that carries you through old age. The formula fills the tank; movement builds the engine.
The strongest number you’re probably not tracking
Of all the health metrics studied, few predict how long you’ll live as powerfully as fitness — your body’s ability to take in and use oxygen. In a study of over 120,000 people, higher fitness tracked with dramatically lower mortality, with no ceiling: fitter was always better. Just as striking, being unfit carried a mortality risk on par with, or greater than, smoking or diabetes.
The good news: fitness is trainable at any age, and the biggest jump comes from moving the least-fit end of the scale. Going from sedentary to lightly active is the single most valuable step.
Muscle is the master variable
After about age 40, we lose muscle steadily unless we fight for it — and that loss (sarcopenia) is what tips people into frailty, falls, and dependence. Building and keeping muscle is the closest thing there is to a healthspan insurance policy: muscle-strengthening activity is linked to roughly 10–17% lower all-cause mortality, independent of aerobic exercise. Strength is not vanity; it is the reserve you draw on for the rest of your life. (This is exactly why creatine is a companion to the formula — it makes the training you do pay off more.)
The two engines
Breathless aerobic
- A base of easy movement — walking, cycling, most days
- Plus regular “breathless” efforts — brisk enough that talking gets hard
- Builds VO₂max, mitochondria, and vascular health
- Aim ~150 min/week, with some vigorous
Resistance training
- Two sessions a week, the whole body
- Progressive load — a little harder over time
- Bodyweight, bands, or weights all count
- The direct defense against muscle loss
Movement and the formula, together
Exercise is the most powerful hormetic signal we have — a brief, healthy stress that switches on AMPK, mitochondrial renewal, and BDNF (the brain’s growth factor), the very pathways the formula supports. But the stimulus only becomes strength if the body can rebuild afterward: that’s where creatine, omega-3, protein, and sleep come in. Train to send the signal; use the formula and the plate and the night to answer it. The muscle you build is also where much of the NAD⁺ and creatine work actually happens.
The practice
Start where you are
- If you have heart disease, are very sedentary, or have symptoms (chest pain, breathlessness, dizziness), get medical clearance before starting vigorous exercise.
- Progress gradually. Most injuries come from doing too much too soon, not from the exercise itself.
- Learn good form for resistance work — from a coach, video, or trainer — before adding heavy load.
- Some muscle soreness is normal; sharp joint pain is not. Adjust and, if needed, seek advice.
Selected research
- Mandsager K, et al. Association of cardiorespiratory fitness with long-term mortality. JAMA Netw Open. 2018. PubMed 30646252
- Momma H, et al. Muscle-strengthening activities and risk of all-cause and cause-specific mortality: systematic review & meta-analysis. Br J Sports Med. 2022. PubMed 35228201
- Ruegsegger GN, Booth FW. Health benefits of exercise. Cold Spring Harb Perspect Med. 2018. PubMed 28507196
- Physical Activity Guidelines for Americans, 2nd ed. (150 min/week aerobic + 2× resistance). US HHS. 2018. health.gov
Exercise is a lifestyle practice offered to support general wellbeing. It is not a treatment for any disease, and this is not an individualized training prescription. Consult your physician before beginning a new exercise program, especially if you have a medical condition.