This content was extracted from Wikipedia and is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported License
Progression records for shot put must be set in properly conducted, official competitions under the standing IAAF rules unless modified by World Masters Athletics. Divisions are based upon the age of the athlete, with the category giving a minimum and implying a maximum age (5 years higher than the minimum). So, for example, the M35 division consists of male athletes who have reached the age of 35 but have not yet reached the age of 40, so exactly from their 35th birthday to the day before their 40th birthday.