4 Expert-Backed Ways to Build Mental Toughness
But fleshing out a “Why?” that stands up to all the external judgment inherent in a running life can help you avoid crises of self-confidence.
David Roche • The Happy Runner: Love the Process, Get Faster, Run Longer
“Mental toughness is persistence not intensity.”
James Clear • 3-2-1: On the Cycle of Improvement, Self-Doubt, and Building a Spirit (June 18, 2020) | James Clear
SYSTEMATICALLY GROW BY ALTERNATING BETWEEN STRESS AND REST Stress Yourself Seek out “just-manageable challenges” in areas of your life in which you want grow •Just-manageable challenges are those that barely exceed your current abilities. •If you feel fully in control, make the next challenge a bit harder. •If you feel anxious or so aroused that yo
... See moreBrad Stulberg • Peak Performance: Elevate Your Game, Avoid Burnout, and Thrive with the New Science of Success

To guard against injury, focus on developing yourself into a robust and resilient individual. So, while speed is an advantage, physical resilience is a necessity.
Ross Edgley • The Art of Resilience: Strategies for an Unbreakable Mind and Body
Mental toughness is a skill and like any skill it can be developed. Learning how to overcome fear is just like building a new habit. Start small and increase slowly.