Estimate one-rep max from a set and its RPE

Estimate a one-rep max from weight, reps and RPE, treating RPE as reps in reserve (RPE 8 = 2 reps left) and applying the one-rep max formula to reps + reps in reserve.

Method: Reps in reserve = 10 − RPE (Zourdos et al. 2016). The set is treated as reps + reps in reserve to failure, then Epley or Brzycki is applied.

get/api/tools/rpe-estimate-max

Request

  • Base URL: https://www.ironledger.app
  • URL: https://www.ironledger.app/api/tools/rpe-estimate-max
  • Auth: none declared

Query parameters

weightnumber required

Weight lifted for the set.

repsinteger required

Reps completed, 1 to 20.

rpenumber required

Rating of perceived exertion, 5 to 10, read as reps in reserve (RPE 8 = 2 reps left). Half points allowed.

unit'kg' | 'lb'

Weight unit for every load in and out: kg or lb.

formula'epley' | 'brzycki'

One-rep max formula: epley (weight × (1 + reps ÷ 30), the one the IronLedger app uses) or brzycki (weight × 36 ÷ (37 − reps)).

Response

The result, a one-line summary, the method used and a link to the same result on the site.

toolstring required
versionstring
summarystring required
resultobject required
methodstring
urlstring uri required

Changes

No recorded changes to this operation across all 1 revision of this API.