Ratios

Health Is a Set of Ratios — Not a Series of Extremes

A long time ago Martin Rooney wrote something I copied onto my medical school desktop and kept as a note. The advice was simple. Read twenty-five pages a day. Go to two conferences a year. Talk to an expert in your field once a month. Do that for seven years and you'll be an expert in almost anything. But the line that actually stuck wasn't about expertise. It was about your entertainment-to-education ratio — how much of your input goes toward getting better versus mindless consumption.

A friend likes to joke that having fun is against my religion. He's not entirely wrong. But the ratio idea has outlived the joke, because the longer I practice, the more convinced I am that most of health — and most of life — is a handful of ratios you're either managing or ignoring.

Everything Worth Tracking Is a Dial, Not a Switch

Consider how many of them there are. Movement versus sedentary time. Whole food versus junk. Strength work versus cardio. Reaching out to people versus waiting for them to reach out to you. Trying something new versus running the same routine. Workouts versus rest. Saying yes versus saying no. Creating versus consuming. Time with your kids versus time with your spouse. Time with your family versus time with your phone. Time alone versus time with other people.

None of these has a single correct setting. Each is a dial, not a switch. The mistake is treating any one of them like it has a finish line.

The One That Matters Most

The ratio I talk about most is present versus future. How much of today are you spending on right now, and how much on positioning yourself for later? Both selves have a claim. I've argued before that you're negotiating between a short-term self that wants comfort now and a long-term self that wants capacity later, and the whole game is feeding both without letting either run the table.

This is where most people break themselves. They try to act like health Jesus. Whole30, 75 Hard, every ounce of fun cut out. They white-knuckle it to the finish line and then revert straight to the opposite. The challenge ends, the weight comes back — often with interest — and they yo-yo, then wonder why nothing sticks. The answer is boring. The intervention was never sustainable. You cannot run any ratio at its theoretical extreme forever.

Guilt is the engine underneath it. It is one of the most common things I deal with in patients. They allow themselves a little fun, feel guilty about it, and the guilt tips them into a binge. The all-or-nothing setting doesn't just fail. It actively produces the behavior it was trying to prevent.

Grant the Cynic His Point

Here's the part the optimizers don't want to hear. Three hours of training a day is not available to a working parent unless it happens to be the job. Perfect presence — being fully in every moment with your kids — is a lovely idea and a fantasy for someone trying to survive a Tuesday. Even decision-making is a ratio. YOLO every choice and the consequences stack up; optimize every choice for some distant future and you never actually live. You need enough short-term thinking to make the long-term survivable.

So no, the answer is not more discipline applied harder. It's a better-balanced ratio you can hold for a decade.

Nudge the Dial, Then Automate the Nudge

You don't monitor all of these at once. That's just another way to burn out. You pick the one or two that are obviously out of balance, and you nudge them. Then you make the nudge automatic, because the environment beats willpower every time.

A chapter a day adds up. A short, hard workout three times a week adds up. Actually paying attention to your partner adds up. Doing nothing and quietly atrophying also adds up — that ratio compounds in the wrong direction just as reliably as the good one compounds in the right direction. Systems are maintenance protocols. You set them once and nudge them up or down over time. The work is in the design, not the daily heroics.

The Second Kind of Ratio: The Scoreboard

There's a second category worth knowing, and these are the ones a clinician actually measures. Your behavioral ratios are the inputs. These are the scoreboard.

Waist-to-height is the one I'd teach first, because anyone can do it with a tape measure: keep your waist under half your height. It tracks cardiovascular and metabolic risk better than BMI and costs nothing. Waist-to-hip ratio tells a similar story about where you carry fat, which matters more than how much. Triglyceride-to-HDL ratio is a cheap window into insulin resistance — when it climbs, your metabolism is usually drifting long before your fasting glucose flags it. For cardiovascular risk, the ratio of ApoB to ApoA1 — atherogenic particles against protective ones — has become one of the more honest numbers we have. And your VO₂ max relative to others your age and sex sits among the strongest predictors of all-cause mortality we can measure.

I'll add the caveat I always add. Don't fetishize a single number. The omega-6 to omega-3 ratio gets cited with far more confidence than the evidence supports. A ratio is a signal, not a verdict. But the useful insight holds: these measurable ratios are mostly downstream of the behavioral ones. Move more, eat better, sleep, lift, stay connected — and the scoreboard tends to follow.

Rebalance, Don't Pick Winners

The best investors don't win by finding the one perfect stock. They choose a sensible allocation and rebalance it as life changes — trimming what's run too hot, adding to what's been neglected, otherwise leaving it alone to compound. Buffett built a fortune largely by being boring and consistent over a very long horizon.

Your health works the same way. You're not hunting for the perfect protocol. You're managing an allocation across a dozen competing ratios, rebalancing the one or two that have drifted, and trusting the rest to compound. Manage the balance. Skip the extremes.

3-Point Summary

• Health is a collection of ratios, not a set of extremes — movement to rest, present to future, whole food to junk — and the goal on each is a sustainable balance, not a maxed-out setting.

• Perfectionism is the failure mode. All-or-nothing regimens like Whole30 or 75 Hard produce the guilt-and-binge yo-yo; consistency at an imperfect setting beats optimization you can't maintain.

• Behavioral ratios are the inputs; clinical ratios are the scoreboard. Waist-to-height, triglyceride-to-HDL, ApoB/ApoA1, and VO₂ max mostly move when your daily habits do.

3 Practical Takeaways

1. Pick one ratio that's obviously off and nudge it. Don't audit all of them at once. Choose the dial furthest out of balance — too sedentary, too little sleep, too much consuming — and move it one notch.

2. Build the system once so willpower isn't the variable. A chapter a day, a standing gym slot, fruit on the counter. Make the better default the easy default, then let it compound.

3. Know two or three numbers, not twenty. Track waist-to-height, and if you get labs, triglyceride-to-HDL or ApoB. Treat them as signals to rebalance — not report cards to obsess over.