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Athverge

Methodology

How we measure and calculate

Every number on this site comes from the app itself, and every piece of advice in the app comes from a fixed calculation rule. Here is how both work, and which sources the app leans on.

How the numbers on this site come about

Every count on this site, from the 2,328 NEVO products to the 1,311 exercises, was counted in the app itself, not estimated. They are kept in one place in this site’s code, with the date of the last measurement next to them. That date also appears under the figures on the homepage.

The last measurement was on 9 October 2026, against app version 1.2.1. With a new version we count again. What users cannot yet see in the app does not go on this site, even if it has already been built.

Nutrition: how the app determines your expenditure

At the start the app estimates your daily energy expenditure with the Mifflin-St Jeor formula, with protein at 1.8 grams and fat at 0.9 grams per kilo of body weight. You choose a direction: 20 or 10 per cent below, maintenance, or 10 per cent above. The intake does not advise going faster than 0.7 per cent of your body weight per week.

After that the app learns your real expenditure from what you log and what you weigh. It sets your average intake against how fast your weight actually changes, and calculates with 7,700 kilocalories per kilo of body weight. That weight is a trend line that takes the time between two weigh-ins into account; an outlier, such as a typo, counts for at most 2 per cent a day.

Every week that produces a review with a concrete proposal. The proposal does not apply itself: you decide.

Training: how the proposal for your next set comes about

The proposal only compares your heavy sets, and only workouts under the same prescription. Hit the top of the rep range on all sets and the weight goes up and you start again at the bottom of the range: double progression. Your RPE steers too, and after a break the app first proposes holding or a step back.

Your weekly volume per muscle group moves between limits that training science calls volume landmarks: a lower limit below which you build little, and an upper limit above which your recovery falls short. After a workout you give feedback per muscle group, and on that the app adjusts the volume for the next week. A deload week is always a proposal.

The exact thresholds of these rules are product choices that may still change. That is why they are not given here as fixed numbers. The app works out your estimated 1RM with the Epley formula.

Cardio: zones and the Cooper test

The app calculates your heart rate zones with the Karvonen method: on your heart rate reserve, the difference between your resting heart rate and your maximum heart rate. It estimates that maximum as 220 minus your age, and you can override it yourself.

The Cooper test is twelve minutes of running as far as you can. From the distance the app estimates your VO₂max, with a level attached.

What these rules are not

They are fixed rules, not AI: the same input always gives the same advice, and the app says why in one sentence. The AI features in the app, such as recognising a meal from a photo, are an aid that depends on an external service, as long as that service is available.

Athverge gives no medical advice. A recovery score or a signal is not a diagnosis.

The sources the app cites

For every ready-made programme the app cites what it is based on. These are the sources that come up there, written the same way as in the app, with what they are used for.

Volume and frequency

  • Schoenfeld (2016): training frequency per muscle group
  • Schoenfeld (2017): weekly volume and muscle growth
  • Grgic (2018): frequency at an equal weekly volume
  • Lasevicius (2018): growth with light loads, close to failure

Strength and periodisation

  • ACSM: progression in strength training
  • Rhea (2003): building strength and deload weeks
  • Bickel (2011): regaining strength after a break

Specific groups

  • Helms (2014) and Murphy (2022): strength training in a calorie deficit
  • ACSM (2019) and Fragala (2019): strength training for older adults
  • Beattie (2014) and Blagrove (2018): strength training alongside running
  • Louw (2017): neck and shoulder complaints in screen work

Adapted training

  • Willy (2019): knee
  • Steele (2015) and McGill (2015): lower back
  • Haahr (2005) and Littlewood (2015): shoulder
  • ACOG Committee Opinion 804 (2020) and Mottola et al. (2018): pregnancy
  • Goom et al. (2019): returning after giving birth

Calculation rules

  • Mifflin-St Jeor (1990): resting energy expenditure
  • Karvonen (1957): heart rate zones on the heart rate reserve
  • Cooper (1968): VO₂max from the twelve-minute test
  • Epley (1985): estimated 1RM
  • Israetel, Renaissance Periodization: volume landmarks

Nutrition data

  • NEVO-online versie 2025/9.0, RIVM, Bilthoven
  • Open Food Facts: products with a barcode

Launch

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