You're doing so good. You're almost there. Breathe. Relax. You know what you're doing. One of my favourites, when I'm getting stressed about my pace during a half-marathon, is run your race. Keeping your thoughts optimistic when you start to struggle is so crucial. I'll think something positive, or sometimes even say it out loud, then shake out my shoulders or my hands to relax myself and help me shake off the fatigue, the stiffness, and any negativity.
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