Poundage Chart, in: Boyd Epley Workout (Lincoln, NE: Body Enterprises, p. 86)
Epley · 1985
Convention · Rang 8 von 9
last checked 26 July 2026
Self-published grey literature from 1985 with no digital edition. The citation was verified indirectly, in the reference lists of two peer-reviewed papers that use the formula (Reynolds et al. 2006 and Richens & Cleather 2014, the latter reachable at https://pmc.ncbi.nlm.nih.gov/articles/PMC4042664/). No library catalogue entry and no ISBN could be confirmed, so whether it was a catalogued book or an in-house manual is left open rather than guessed.
What this work gives Aellic
1RM estimate w × (1 + reps/30). Grey literature, and worth stating plainly: the source is a self-published training chart, not a study — the formula is an algebraic reconstruction of that table, with no sample and no derivation data behind it. Richens & Cleather 2014 describe it in their own comparison table as “a poundage chart, not based on scientific research”. Aellic uses it because it is the established convention and performs acceptably in validation work, not because it is well founded. The cap at 10 repetitions is carried by reynolds2006 .
Correction of 26 July 2026
The entry had no bibliographic record at all and asserted that “every 1RM formula becomes unreliable beyond roughly 10 repetitions” without a source. The claim holds for LINEAR estimators such as this one — reynolds2006 states it outright — but not for every formula: non-linear equations are validated to about 15 repetitions. Provenance and the supporting source are now on record.
The entry on the register was wrong. It was not replaced but kept — with what holds instead standing next to it.
Where this sits in the engine
2 declared sites — constants and thresholds in the code that point at this entry.
- Training Strength standards and ranks 1 site
- Training Workout logging — 1RM estimation 1 site
Register entry epley · Convention