Speed is a skill
Sprinting is a science
Relax and win!
Quotes from Bud Winter in 1981 ( Bud Winter trained athletes who set 37 World Records and produced 27 Olympians, as well as influencing many coaches around the globe including Glen Mills, Usain Bolt’s coach.)
You must learn to relax under pressure, which demands repetition day in day out. Eat, drink and sleep it my friends. You must maintain maximum speed in a relaxed mode. What makes the difference to your speed is good technique, especially under pressure. Running relaxed under pressure is difficult and requires you to learn your running mechanics slowly at first with lots of repetitions. Running mechanics should be a big part of your warm ups to put you in the right frame of mind to perform your sporting task.
If you run poorly then be content not to reach your full potential – the choice is yours. A good analogy – run with poor form and your car runs rough, run with good technique your car runs smooth.