The 75 Hard challenge is a mental toughness program designed by Andy Frisella to build discipline, resilience, and consistency. Unlike traditional fitness programs, it focuses on both physical and mental transformation by enforcing strict rules for 75 consecutive days. The 75 Hard challenge is a mental toughness program designed by Andy Frisella to build discipline, resilience, and consistency. Unlike traditional fitness programs, it focuses on both physical and mental transformation by enforcing strict rules for 75 consecutive days. Health and Fitness, Health Tips, Exercises & Workout Tips, Diet & Wellness | Times of India Lifestyle