The 75 Hard Challenge is a strict self-imposed regimen lasting 75 consecutive days, designed to build mental discipline through extreme consistency. It requires following five daily rules: complete two 45-minute outdoor workouts (no gym), follow a strict diet, drink at least three liters of water, read 10 pages of a non-fiction book, and take a progress photo. Participants may not skip a single day; failing any rule means restarting the 75-day cycle. This explainer outlines the core rules, origins, claimed benefits, common risks, and what verifiable evidence currently exists, using an evergreen, fact-first framing to support long-term usefulness.
