Andy Frisella, an entrepreneur, devised the 75 Hard Challenge, a popular self-improvement program. The challenge consists of a set of rules that must be fulfilled without fail for 75 days. Following a rigorous diet, drinking a gallon of water each day, exercising exercise twice a day for at least 45 minutes each time, reading 10 pages of a non-fiction book each day, taking progress photos, and avoiding alcohol and cheat meals are among the restrictions. The 75 Hard Challenge is intended to help people improve their discipline, mental toughness, and good behaviors.