Scoring
ISF Points system
ISF Points is the official relative scoring system of ISF Rules v5.2 (Section 10.9) used to compare Classic Streetlifting results across body weights and sexes; age is deliberately not taken into account, so the absolute ranking compares athletes regardless of age.
Purpose
Provide a comparable score for absolute rankings, cross-category comparison and official ISF ratings.
Formula (vNext K RC1.1)
ISF Points = 100 × (Result / (Expected × AgeFactor))^1.5, where Expected is the expected result for the athlete bodyweight from one of six official Classic segments (Men / Women × Pull-Up, Dip, Two-Lift Total).
Age and bodyweight
Age is deliberately not taken into account: AgeFactor = 1.0 for all age groups in the official open absolute mode. There is no separate bodyweight bonus: bodyweight is built into the expected strength curve.
Multirep and Weighted Calisthenics
Coefficients for Multirep Streetlifting and Weighted Calisthenics are approved by the ISF separately; until then those results are ranked in kilograms or repetitions.
Official data workflow
Only results from compliant competitions with accredited judging and approved equipment belong in the official ISF rating.
Rules v5.2 scoring system
ISF Points system in Rules v5.2
Rules v5.2 define ISF Points as the official relative scoring system for objective comparison of results across body weights and sexes; age is deliberately not taken into account. Formula version: vNext K RC1.1 (full refit), official public release; official calculation mode: open absolute.
Based on ISF Rules v5.2, Section 10.9.
Purpose
- Absolute rankings.
- Comparison of athletes from different weight categories.
- Formation of official ISF ratings.
Main formula
- ISF Points = 100 × (Result / (Expected × AgeFactor))^1.5.
- Result is the additional weight lifted in kg (Two-Lift Total: sum of the best valid attempts); Expected is the expected result for the athlete bodyweight.
- Final points are rounded to 0.01; if the result equals zero (no valid attempt), ISF Points = 0.
Expected strength curve
- If BW ≤ BWopt: Expected = exp(a + b × ln BW).
- If BW > BWopt: Expected = exp(c + d × ln BW).
- BW is the bodyweight in kg; ln is the natural logarithm; a, b, c, d and BWopt are the official parameters of the segment.
Official segments
- Six Classic Streetlifting segments: Men and Women × Pull-Up, Dip and Two-Lift Total.
- The parameters are mandatory and change only through a new edition of the Rules or an official ISF decision on a new formula version.
- Multirep Streetlifting and Weighted Calisthenics coefficients are approved by the ISF separately; until then those results are ranked in kilograms or repetitions.
Age and bodyweight
- Age is deliberately not taken into account: AgeFactor = 1.0 for juniors, open athletes and Masters, so the absolute ranking compares all athletes on one ISF Points scale regardless of age.
- No separate bodyweight bonus applies: bodyweight is built into the expected strength curve.
- Example: Men, Pull-Up, BW 80.5 kg, Result 72.5 kg → Expected = exp(0.9090 + 0.7524 × ln 80.5) ≈ 67.40 kg; ISF Points ≈ 111.56.
Official rating conditions
- Accredited judging panel.
- Verified and approved equipment.
- Full compliance with ISF technical and organizational requirements.
- Competition conducted in accordance with Rules v5.2.
Section 10.9.3
Official segment parameters (Classic Streetlifting)
Six official segments, one for each sex and discipline. These parameters are official and mandatory.
| Segment | a | b | c | d | BWopt, kg |
|---|---|---|---|---|---|
| Men - Pull-Up | -4.323536630854744 | 2.033050895010818 | 0.9090053744768216 | 0.7523890837917322 | 59.4901595957986 |
| Men - Dip | 1.0240622219809563 | 0.8042071243505172 | -0.49541479809452293 | 1.164945728428382 | 67.49999816980723 |
| Men - Two-Lift Total | -0.20638181724251187 | 1.2485663689768396 | 1.4857167492683867 | 0.85 | 69.7880284643068 |
| Women - Pull-Up | -0.20328255424470507 | 0.8822234401782423 | 2.2568806471363776 | 0.23965525437498533 | 46.00000323203141 |
| Women - Dip | 1.306104073125799 | 0.5587859300763097 | 2.7503436233704557 | 0.2 | 56.0 |
| Women - Two-Lift Total | -0.6837801881061837 | 1.2132371876994696 | 3.3948558385156042 | 0.2 | 56.0 |
Official calculator
ISF Points calculator
Classic Streetlifting, formula vNext K RC1.1, open absolute mode (AgeFactor = 1.0). Multirep and Weighted Calisthenics coefficients are approved separately.