1: The Undertaker's intense training regimen

2: Building muscle mass through weightlifting

3: Cardiovascular endurance workouts for stamina

4: Diet and nutrition tips for a lean physique

5: The importance of rest and recovery in training

6: Mindset and mental strength for peak performance

7: Incorporating flexibility and mobility exercises

8: The Undertaker's dedication to fitness and discipline

9: Achieving the best physique through hard work and commitment