CrossFit enthusiasts taking on the 75 Hard Challenge can integrate the program into their existing training regimen to enhance both physical and mental resilience. The challenge's requirement for two daily workouts can be tailored to include a mix of CrossFit WODs (Workouts of the Day) and complementary activities like stretching or mobility work. Nutrition plays a crucial role in supporting the high-intensity demands of CrossFit, so a balanced diet with sufficient protein and carbohydrates is essential. The mental toughness aspect of the challenge helps CrossFitters push through challenging workouts and stay committed to their goals over the 75-day period.