Stress Threshold Training
Deliberately place yourself into situations that moderately increase adrenaline, then cognitively and emotionally calm yourself while activated in order to raise stress capacity over weeks to months. This can be done by bringing heart rate very high through high-intensity exercise such as sprinting or going hard on the bike, then relaxing the mind while the body is highly activated. Practice about once per week; it does not need to be done every workout.
“They involve placing oneself deliberately into a situation where our adrenaline is increased somewhat, not to the extreme. And then when we feel flooded with adrenaline, and normally we would panic, it's about cognitively, mentally, emotionally, calming ourselves and being comfortable with that response in our body.”