ORLOV FITNESS WORLD is a Russian-language fitness website by Sergey Orlov. It offers free browser-based tools for calorie and macronutrient tracking and relative strength calculations (Wilks, DOTS and IPF GL), practical checklists, a sports journal, books and self-paced online courses hosted on Skillspace. Paid courses and books have separate prices. The website also links to music releases and clearly labels its companion apps and games as test versions.