Natural Muscle Mayhem Pro Am

EVENT ELIGIBILITY

This competition and INBF | WNBF organization is open to all amateur athletes who have not at any time during the 10 years prior to this event engaged in the personal use of anabolic steroids, growth enhancing drugs, peptides, and other substances like SARM’s products, Pro-hormone compounds, and many other banned substances on the WADA Prohibited list. It is the athlete’s sole responsibility to check all supplement ingredients prior to purchasing them!

PLEASE DO NOT show up to your polygraph examination without reading the banned substance list, or disclosing any concerning supplement or drug history with us. This policy is for your protection!

Read the Banned substances list now

Pro Am Info

November 1, 2025
WNBF Pro Qualifier
All Pro's Qualify For Worlds
Amateur Worlds Qualifier - Top 3 in Open & Masters Qualify

Pro Divisions

Pro Bikini
Pro Figure
Pro Men's Bodybuilding
Pro Women's Bodybuilding
Pro Men's Physique

Amateur Divisions

Bikini
Bodybuilding
Wheelchair Bodybuilding
Figure
Fit Body
Men's Physique
Junior (20 to 23)
Debut
Novice
Masters
Open

Weight & Height Cutoffs

Women Open Bodybuilding – One Class

Men Open Bodybuilding

Lightweight – under 165
Middleweight -165 ¼ to 185
Heavyweight – 185 ¼ & Over

Novice Bodybuilding
TBA

* Wheelchair Bodybuilding *
1 Class

Fit Body
1 Class

Bikini and Men’s Physique
TBA

Promoter may adjust classes based upon number of entries

Event Location

The Performing Arts Center Sheldon HS
8733 Kingsbridge Drive
Sacramento, CA 95829

Dream tan & messy oil based
tanning products not permitted in venue.

2023 INBF Natural Muscle Mayhem Open Physique Overall Winner WNBF Pro Kyle Okura Awarded by Bob Bell Tina Smith

Drug Testing & Entry

This drug-free event is polygraph and urine tested. Polygraph fees are due at the time of your test which will occur the week of the show. Entering early gives you preference in scheduling your test.