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当一种水栖动物象海豹或鸭子潜入水下时,就发生明显的心动过缓和周围血管收缩。陆地上的动物,其中包括人,仍然保留这一强反射的痕迹:正常人摒气把脸浸入冷水会使安静时心率迅速下降10～40％,并伴有轻微的血压升高。虽然人的潜水反射在安静时的作用并不强烈,但是它保留着引起重要心血管变化的潜在可能;因此,当在运动中引发潜水反射时,完全可以抵消大运动量引起的心动过速。
When an aquatic animal such as a seal or a duck dives underwater, significant bradycardia and peripheral vasoconstriction occur. Animals on the ground, including humans, still retain this strong reflection: normal people get rid of the face immersed in cold water will make the heart rate dropped 10 to 40% quiet, and accompanied by mild blood pressure. Although human diving reflex does not play a significant role in quietness, it retains the potential for causing significant cardiovascular changes; therefore, it is entirely possible to counteract the tachycardia caused by large amounts of exercise when diving reflexes are triggered during exercise.