Body Forge, developed by World Gym as part of the WOW series, is a strength training group class designed around foundational training principles. The class uses equipment such as barbell plates, bars, resistance bands, and medicine balls. Programming includes sequences like primary muscle groups followed by supporting muscles, multi-joint movements paired with single-joint actions, and isometric exercises combined with isotonic movements. Variations in plate weight, movement angles, and lever length are used strategically to develop muscular endurance and explosive power, all choreographed to motivating music.

The class welcomes participants of all levels. It starts with foundational movements and offers progressive options to suit different abilities. A portion of high-intensity interval training (HIIT) may also be incorporated to boost cardiovascular benefits. Instructors provide modifications based on individual fitness levels to help participants train effectively.