THE FIVE-DOMAIN FITNESS ASSESSMENT EVERY MAN OVER 50 SHOULD RUN

Most men over fifty carry a story about themselves: I used to be strong, I used to run a six-minute mile, I could carry anything you handed me. Some of that's still true. Some of it hasn't been true for years, and nothing has forced you to check — until you actually test it.

Why One Score Doesn't Tell You Anything

Battle Hard After 50 doesn't hand its readers a single fitness grade. It hands them five separate numbers, across five domains: Strength, Power, Engine, Carry and Grip, and Mobility. The reasoning isn't stylistic — it's that these qualities don't age at the same rate. Research separating strength from power in older adults has found power output declines earlier and more sharply than maximum strength, which means a man can hold onto a respectable slow lift while the fast-twitch capacity that helps him react, jump, or catch himself has quietly been fading for years. Averaging that into one number would hide the exact information a man needs to train well.

The Five Tests

Each domain gets one anchor test — a practical, repeatable measurement, not a full physical exam of everything that domain covers.

• Strength — Max Push-Ups. Standard form, chin to the floor, full lockout, counted to failure. The test protocol comes from ACSM's Guidelines for Exercise Testing and Prescription (12th edition); the age-and-sex category data underneath it originates with the Canadian Society for Exercise Physiology. Men who can't complete a full push-up start instead with a 30-second chair stand as an entry test — recorded as a raw number, not scored against a published cutoff, because the available older-adult norm sets don't cover this book's full 50-to-69 age range cleanly enough to justify one.
• Power — Standing Broad Jump. Best of three measured attempts, recorded in inches. This one stays a raw baseline rather than a scored benchmark — a large, age-matched male norm set for this exact field test doesn't exist, so no cutoff gets printed. The value is in the trend from baseline to retest.
• Engine — The One-Mile Walk (Rockport Walk Test). Walk a measured mile as fast as you can without breaking into a run, then plug your time, finishing heart rate, weight, and age into the Kline equation for an estimated VO2max. It's a field-test estimate, not a lab measurement — useful for tracking change over time, not for treating a one- or two-point shift as a precise physiological fact.
• Carry and Grip — Grip Strength. Seated, elbow at roughly 90 degrees, three attempts per hand on a hand dynamometer, highest value recorded. The benchmark bands come from a 2025 systematic review pooling more than 2.4 million adults across sixty-nine countries — the largest dataset ever assembled on this measurement. A separate, widely cited prospective cohort study following nearly 140,000 adults across seventeen countries found grip strength had a stronger statistical association with all-cause and cardiovascular mortality than systolic blood pressure did in that analysis. That's an association, not proof that training your grip up changes the risk directly — but it's a large part of why this simple, thirty-second test earns a full domain of its own.
• Mobility — Chair Sit-and-Reach. A repeatable posterior-chain flexibility measure, recorded in inches, positive or negative relative to your toes. No published benchmark tier is assigned here — it stays a raw number you track against your own baseline.

Published Benchmark, or a Plainly Labeled House Standard?

Two of the five tests — push-ups and grip strength — get Recruit / Field Ready / Battle Hard tiers, because a defensible, age-matched published benchmark exists for that exact test. The other three — power, engine, mobility — stay as raw scores on purpose. The book is direct about why: where a cutoff would require interpolating between studies, borrowing a lab-measured norm for a field-test method, or inventing precision the evidence doesn't support, the cutoff gets dropped and the measurement stays. A raw number you retest honestly is worth more than an invented tier that looks tidy on the page but can't be defended.

Where the book does build its own reference points — the WPP standards — it labels them as exactly that, every time, rather than dressing them up as if they came from a peer-reviewed source.

The Protocol

Run all five tests before doing anything else. Write every result down. Two numbers — push-ups and grip — will land you in a published tier. Three numbers — broad jump, Rockport estimate, chair sit-and-reach — are your personal baseline, with nothing to compare them against except your own retest twelve weeks later.

• Don't average the five numbers into one score. A man can test in the top grip tier while his engine number says he should start with the six-minute-walk entry option instead of the full-speed mile. That's not a contradiction — it's the honest picture of how a real fifty-plus body actually stands after decades that trained some things by accident and let others go quiet.
• Don't compare raw units to each other. Inches of jump distance, estimated VO2max, and inches of reach aren't interchangeable just because they'd look cleaner side by side.
• Retest the identical battery at the twelve-week mark, under the same conditions. A system that can't be retested isn't a system — it's a story you're telling yourself.

The push-up and grip benchmark bands describe comparative population data, not clinical or occupational readiness standards, and are not a substitute for guidance from your own physician — particularly for the grip test, where the source paper itself notes that people whose health conditions made testing inadvisable were often excluded, so the reference population likely skews healthier than the general public.