english: If you're habitually a negative thinker, you typically see a stressful situation with a threat stress response, meaning if your boss wants to see you, you automatically think, "I'm about to be fired," and your blood vessels constrict, and your level of the stress hormone cortisol creeps up, and then it stays up, and over time, that persistently high level of the cortisol actually damps down your telomerase.
non_english: Ak stále myslíte negatívne, na stresovú situáciu typicky  reagujete ako na hrozbu, teda ak si vás zavolá šéf, automaticky si pomyslíte: „Chce ma vyhodiť,“ a vaše krvné cievy sa zúžia, stúpne vám hladina  stresového hormónu kortizolu, ktorá aj zostane na vysokej úrovni, a neustále vysoká  hladina kortizolu zapríčiní, že dôjde k úbytku telomerázy.