Minimum effective dose: the smallest dose that still works

By Dan Remon · Evidence checked October 2026

Most training plans are written for someone with 6 free hours a week and no flights. Then a busy fortnight arrives and the plan drops to zero.

Minimum effective dose is the principle I build every client program on. Find the smallest dose that still moves the number you care about, then do it every week, including the bad ones.

It started in medicine. It works just as well for strength, fitness, habits and the way you run a working day.

What is minimum effective dose?

Minimum effective dose (MED) is the smallest amount of something that produces the result you want. The term comes from medicine, where a doctor prescribes the lowest dose that does the job, set by the patient’s needs, history and goal: how much, how often, when and for how long. In training, it’s the least frequency, volume and time that still makes you stronger, fitter or leaner. Anything above it costs time and recovery for a smaller extra return. The MED isn’t the dose that gives the biggest possible result. It’s the dose you can hold for years, on your worst weeks, while the rest of your life gets the time back.

Why more isn’t always better

More is not better. Better is better. I’ve said it to clients for years, with one correction: more training does produce more, up to a point.

A 2018 meta-analysis of 22 studies found strength increases grew with training frequency, with effect sizes of 0.74, 0.82, 0.93 and 1.08 for 1, 2, 3 and 4 or more sessions a week.¹ When total weekly volume was matched, frequency made no significant difference. The extra sessions helped because they added work.

1 session a week already produced a solid effect, and 4 or more took it from 0.74 to 1.08. That’s diminishing returns: the first dose buys the biggest change, and each one after it buys less for the same hour. The hour you don’t spend on a 4th session goes to sleep, family or the work only you can do.

Minimum effective dose for strength training

The most direct test of the idea is a 2020 systematic review and meta-analysis on the minimum effective training dose for 1-rep max strength in resistance-trained men.² Across 6 studies, a single set per exercise, done 1 to 3 times a week, was enough for significant strength increases. Pooling 5 of them, 1-rep max rose by an estimated 12.09 kg overall, 17.48 kg on the squat and 8.25 kg on the bench press.

The dose behind those numbers: 1 set of 6 to 12 reps at roughly 70 to 85% of 1-rep max, 2 to 3 times a week, taken to momentary failure, for 8 to 12 weeks. The authors call the increases suboptimal but significant, and the data come from trained men, so the picture for women and for the deadlift is less clear.

What I take from it: the minimum works when the effort is real. Fewer sets, each one done properly, with the last reps hard. Intensity is the part you never trim.

The minimum dose to maintain strength and fitness

Keeping strength needs much less than building it, which matters if your next quarter is full of travel. A 2021 narrative review looked at exactly this question.³ In general populations:

• Strength and muscle size, at least in younger adults, held for up to 32 weeks with as little as 1 strength session a week and 1 set per exercise, as long as the load stayed heavy.
• Older adults may need up to 2 sessions a week and 2 to 3 sets per exercise to keep muscle size.
• Endurance held for up to 15 weeks with as few as 2 sessions a week, or with sessions cut by 33 to 66% (as short as 13 to 26 minutes), as long as the heart rate stayed up.

The authors concluded that exercise intensity seems to be the key variable for keeping performance, even when frequency and volume drop a long way. That’s the rule I give clients before a heavy travel month: cut sessions and sets if you need to, but keep the weight on the bar. The older you are, the more sense it makes to plan on the higher end, and fitness over forty covers the rest of that picture.

How much exercise you need for health

The World Health Organization sets the floor for health. Its 2020 guidelines recommend that adults do 150 to 300 minutes of moderate aerobic activity a week, or 75 to 150 minutes of vigorous activity, plus muscle-strengthening work for all major muscle groups on 2 or more days a week.⁴ They also say some activity is better than none, and that anyone not there yet should start with small amounts and build up.

Strength training has its own dose signal. A 2022 meta-analysis of 16 prospective cohort studies linked muscle-strengthening activity with a 10 to 17% lower risk of death from any cause, cardiovascular disease, total cancer, diabetes and lung cancer.⁵ For death from any cause, cardiovascular disease and total cancer, the largest risk reduction, about 10 to 20%, sat at around 30 to 60 minutes a week, and the effect of doing more was unclear. These are observational studies, so they can’t prove cause. Still, 30 to 60 minutes a week fits any calendar.

Minimum effective dose for cardio and intervals

Intervals are the time-poor version of cardio. In a 12-week study at McMaster University, sedentary men trained 3 times a week. One group did 10-minute sessions containing 1 minute of all-out cycling, 3 sprints of 20 seconds. Another did 50-minute sessions of steady cycling. Peak oxygen uptake rose by 19% in both groups, and insulin sensitivity improved in both, despite a five-fold difference in time.⁶

It was a small study of 25 men, matched into groups rather than randomised, so treat it as a useful signal. Intervals don’t replace the rest of your movement either. The WHO minutes still count. I compare the two approaches in HIIT vs cardio.

My minimum effective dose

Here’s mine. To stay lean and keep my strength:

• Strength: 3 sessions of 20 minutes a week.
• Intervals: 2 short interval sessions of 5 minutes a week.

That’s 60 minutes of strength work a week, at the top of the range in the cohort data above.

For nutrition, when I want to drop body fat I don’t change how much I eat. I change the macros, the split of protein, carbohydrate and fat, or the order I eat them in. I know that works for me because I tested it. Yours may be different, and personalised nutrition covers how to find it from your own data.

At work, my dose is 30 minutes of focused work, then 5 minutes of movement.

Minimum effective dose for habits and work

The same rule runs outside the gym. More hours at the desk don’t mean more output. Longer meetings don’t mean better decisions. More corporate training doesn’t mean more learning that carries back to the job, and I say that as someone who runs corporate training. In each case there’s a dose that works and a long tail that only costs time.

For a habit, the MED is the smallest version you’ll do on your worst day: 10 push-ups when the full session won’t happen, 1 page instead of a chapter, a 2-minute plan for tomorrow instead of a full review. Make it small enough that skipping it feels silly. Attach it to something you already do and it holds, which is the idea behind habit stacking.

For work, find the block length where your focus holds, then protect it. Mine is 30 minutes.

How to find your minimum effective dose

You find your MED by testing, the same way I found mine. Here’s the process I use with clients:

1. Pick one number. A lift, your waist, a fitness test or your energy at 15:00. One number per cycle.
2. Start at the low end of the evidence. For strength, that’s 2 to 3 sessions a week of about 20 minutes, with 1 to 2 hard sets per exercise.
3. Hold the intensity. Keep the load heavy enough that the last reps are hard.
4. Track the dose every day. Log whether it happened. That’s all.
5. Review after 28 days. If the number moved, keep the dose. If it didn’t, add one thing, a set, a session or 5 minutes, and run another cycle.

Step 4 is the one that gets skipped, so I give it a tool. The Stealth Tracker is the 60-second daily check-in in the Stealth OS. For MED, it records whether the dose happened that day: session done, focus blocks run, sleep window kept. We don’t track results. We track what caused them.

After 4 weeks of check-ins, a stalled number tells you something clear. If you hit the dose every week and nothing moved, the dose is too low, so raise it. If you missed half the sessions, the dose was never tested, so fix the schedule before you touch the program.

If you’d rather start with a plan already built at this dose, the 30-day executive fitness challenge sets it for you.

How to start

There are 2 ways in, depending on how much support you want.

1. The 1% Scorecard. 8 questions, 2 minutes, free. You get your Compound Index, a score out of 100 across 6 pillars, and the one thing to install first.
2. The Quest. The performance membership: a tested system and a room of founders who run on standards, in 28-day cycles. Each cycle installs one change at a dose you can hold, tracked daily. Cancel anytime.

Find your dose. Then hold it.

Related reading: 3 fitness mistakes women make trying to lose weight and get lean, How to warm up with purpose: the corrective warm-up I use and 10 reasons you need a personal trainer, and when you don’t.

FAQ

Sources

1. Grgic, J., Schoenfeld, B. J., Davies, T. B., Lazinica, B., Krieger, J. W., & Pedisic, Z. (2018). Effect of resistance training frequency on gains in muscular strength: A systematic review and meta-analysis. Sports Medicine, 48(5), 1207-1220. doi.org/10.1007/s40279-018-0872-x
2. Androulakis-Korakakis, P., Fisher, J. P., & Steele, J. (2020). The minimum effective training dose required to increase 1RM strength in resistance-trained men: A systematic review and meta-analysis. Sports Medicine, 50(4), 751-765. doi.org/10.1007/s40279-019-01236-0
3. Spiering, B. A., Mujika, I., Sharp, M. A., & Foulis, S. A. (2021). Maintaining physical performance: The minimal dose of exercise needed to preserve endurance and strength over time. Journal of Strength and Conditioning Research, 35(5), 1449-1458. doi.org/10.1519/JSC.0000000000003964
4. Bull, F. C., Al-Ansari, S. S., Biddle, S., et al. (2020). World Health Organization 2020 guidelines on physical activity and sedentary behaviour. British Journal of Sports Medicine, 54(24), 1451-1462. doi.org/10.1136/bjsports-2020-102955
5. Momma, H., Kawakami, R., Honda, T., & Sawada, S. S. (2022). Muscle-strengthening activities are associated with lower risk and mortality in major non-communicable diseases: A systematic review and meta-analysis of cohort studies. British Journal of Sports Medicine, 56(13), 755-763. doi.org/10.1136/bjsports-2021-105061
6. Gillen, J. B., Martin, B. J., MacInnis, M. J., Skelly, L. E., Tarnopolsky, M. A., & Gibala, M. J. (2016). Twelve weeks of sprint interval training improves indices of cardiometabolic health similar to traditional endurance training despite a five-fold lower exercise volume and time commitment. PLoS One, 11(4), e0154075. doi.org/10.1371/journal.pone.0154075

This article is general information, not medical advice.