IWF introduces GAMX as a new Official Points System
The International Weightlifting Federation (IWF) is pleased to announce the introduction of GAMX points as a new Official Points System for use at IWF events.
GAMX enables direct and equitable comparison of weightlifters’ performances across body weight categories and genders. Developed by Dr. Marianne Huebner, Professor at Michigan State University (USA), the system is based on a peer‑reviewed statistical model and the analysis of a comprehensive dataset drawn from World Championships and Olympic Games competition results.
GAMX estimates average performance levels and performance variability for each body weight and gender, separately for the Snatch, Clean and Jerk, and Total, allowing results to be expressed on a common scale. The system supports innovative competition formats such as mixed team events, where men and women contribute equally to team scores, and enables athletes to track performance independently of changes in body weight and age.
With the introduction of GAMX, the IWF continues its commitment to evidence‑based innovation and equitable performance evaluation in international weightlifting. The IWF recognises two points systems for its competitions: GAMX Points and Robi Points.
To support practical use by the weightlifting community, web‑based applications are available for athletes and coaches to calculate GAMX points for the total (https://huebner.shinyapps.io/GAMX/) or for snatch and clean & jerk (https://huebner.shinyapps.io/GAMX_teams/). Additional documentation and an Excel‑based GAMX calculator (Version 2.0) are publicly available via the Open Science Framework (https://osf.io/wy5mr/overview).
IWF Communications
