Why Less Exercise Is More

What is the minimum effective dose?

The minimum effective dose (MED) is the smallest stimulus that produces a meaningful adaptation. Below it, nothing happens. Above it, you get diminishing returns, or worse, you accumulate fatigue without additional benefit.

The concept originates in pharmacology. Paracelsus established the dose-response principle in the 16th century: the dose makes the poison. Too little of a drug does nothing. Too much causes harm. The therapeutic window is the narrow band between.

Exercise works the same way. Researchers like Brad Schoenfeld, Emmanuel Stamatakis, and David Behm have spent decades mapping the minimum doses for strength, cardiovascular fitness, and flexibility — and the findings are consistent: you need far less than most programs prescribe.

This isn't about being lazy. It's about being precise. The MED is a targeting system that tells you exactly where the return on your time investment is highest and when to stop.

The dose-response curve isn't linear

Most people assume that doubling exercise volume doubles the result. It doesn't. The dose-response curve for exercise is logarithmic: steep at the start, then rapidly flattening.

Stamatakis et al. (2022), publishing in Nature Medicine, tracked over 25,000 non-exercisers using wearable accelerometers and found that just 3–4 minutes of vigorous intermittent lifestyle physical activity (VILPA) per day — things like taking the stairs hard or carrying groceries briskly — reduced all-cause mortality by up to 40%. That is an enormous return from a trivially small input.

Ahmadi et al. (2023) in The Lancet Public Health confirmed this pattern for cardiovascular outcomes: brief bouts of activity lasting 1–2 minutes, accumulated throughout the day, significantly cut heart disease risk even without structured exercise sessions.

The implication is straightforward: the first few minutes of effort per day account for the majority of the health benefit. Everything beyond that has value, but the marginal gain drops fast. If your goal is health rather than competitive performance, precision matters more than volume.

Stretching: 30–60 seconds appears to be the sweet spot

Bandy & Irion (1997) tested three durations of static hamstring stretching — 15, 30, and 60 seconds — and found that the 30-second group gained as much flexibility as the 60-second group. Both outperformed 15 seconds, and 15 seconds was no better than nothing.

Page (2012), in a clinical review across multiple stretching modalities, confirmed a similar pattern: 30–60 seconds per muscle group appears to be the effective window, with diminishing returns beyond 60 seconds in a single session.

This means a targeted stretching routine can hit every major muscle group in under 10 minutes. The key is consistency, because daily short doses beat weekly marathons.

• Couch Stretch, 55 seconds for hip flexors
• Passive Hang, 70 seconds for spinal decompression and shoulders
• Deep Squat Hold, 55 seconds for hips, ankles, and spine

Strength: one hard set captures most of the benefit

Krieger (2010) published a meta-analysis examining single vs. multiple sets for strength gains and found that a single set taken to near-failure captures the majority of the benefit, with additional volume producing progressively smaller returns.

The extra volume costs you significantly more time and recovery. For most people — anyone not training for competitive sport — one hard set is a reasonable starting point and enough to build and maintain functional strength.

For beginners and intermediates, bodyweight exercises provide enough resistance for meaningful strength gains, particularly for upper body pushing and lower body squatting patterns. No gym required.

One set of push-ups to near failure and one set of squats to near failure takes under 5 minutes, and that's enough stimulus to maintain and build functional strength when repeated 2–3 times per week.

• Push-Up, the standard for upper body pressing strength
• Bodyweight Squat, the foundation of lower body strength

Breathwork: 5 minutes shifts your nervous system

Balban et al. (2023), from Huberman's lab at Stanford, ran a randomized controlled trial comparing 5 minutes of daily cyclic sighing against 5 minutes of mindfulness meditation. The breathwork group showed greater reductions in respiratory rate, improved mood, and reduced physiological stress markers.

Five minutes, not twenty, and not an hour-long meditation retreat. A structured breathing pattern (two inhales through the nose followed by a long exhale through the mouth) repeated for 5 minutes shifted the autonomic nervous system from sympathetic to parasympathetic dominance.

This is the minimum effective dose for nervous system regulation. It works because the exhale directly stimulates the vagus nerve, slowing heart rate and lowering cortisol. The effect is immediate and measurable.

Baseline's Shift breathwork modes are built on this research. Each mode is timed to its effective dose, from 90 seconds to 5 minutes depending on the protocol and your target state.

The problem with doing too much

Overtraining is real, but it's not the biggest risk of doing too much — quitting is. Programs that demand too much time get abandoned. The longer the sessions and the more days per week required, the faster people drop off.

Beyond that, excessive volume carries direct costs: chronic overtraining elevates cortisol, suppresses immune function, and increases injury risk. Weekend warriors who do nothing all week then crush a 90-minute HIIT session are the most common visitors to sports medicine clinics.

The minimum effective dose solves both problems. It's small enough to be sustainable and precise enough to be effective. The best program is the one you actually do, every day, for years.

How Baseline applies this

Baseline uses this research to set the duration for each exercise in the app. The exercise library covers mobility, strength, and recovery, and the Shift breathwork modes are timed to protocols from published trials.

The system builds your session automatically — you select your available time and what you want to work on, and Baseline sequences the exercises and runs the timers. A complete session covering mobility, strength, and breathwork takes 10–20 minutes.

References

• Stamatakis E, et al. Association of wearable device-measured vigorous intermittent lifestyle physical activity with mortality. Nature Medicine. 2022;28(12):2521–2529. doi:10.1038/s41591-022-02100-x
• Ahmadi MN, et al. Device-measured physical activity and incident heart failure. The Lancet Public Health. 2023;8(10):e800–e810. doi:10.1016/S2468-2667(23)00183-4
• Bandy WD, Irion JM, Briggler M. The effect of time and frequency of static stretching on flexibility of the hamstring muscles. Physical Therapy. 1997;77(10):1090–1096. doi:10.1093/ptj/77.10.1090
• Krieger JW. Single vs. multiple sets of resistance exercise for muscle hypertrophy: a meta-analysis. J Strength Cond Res. 2010;24(4):1150–1159. doi:10.1519/JSC.0b013e3181d4d436
• Balban MY, et al. Brief structured respiration practices enhance mood and reduce physiological arousal. Cell Reports Medicine. 2023;4(1):100895. doi:10.1016/j.xcrm.2022.100895