Testicles lift and descend in response to the contraction and relaxation of the cremaster muscle. Testicles rest gently inside this thin, pouch-shaped muscle, which draws them toward or away from the body as a way of regulating their temperature. The Mayo Clinic lists several factors, apart from temperature, that can trigger the retraction of the testicles. These include stimulation of the genitofemoral nerve and extreme emotions such as anxiety.Know More
Sexual arousal is another condition that can affect the tension in the cremaster muscle. At high states of arousal, the muscle often contracts and brings the testicles close to the body. When this happens, the skin of the scrotum becomes wrinkled and the testicles' temperature, which is usually a degree or two cooler than the body's core temperature, rises. According to HowStuffWorks, these movements are perfectly normal and are part of the male body's system for maintaining the optimal temperature for the formation of sperm.
Pain experienced during retraction, or at any other time, is potentially a sign of a serious medical problem. The National Institutes of Health considers acute pain in one testicle to be a medical emergency. If pain is present, or if the testicles fail to return to their normal state after retraction, it is important to seek medical assistance as soon as possible.Learn more about Human Anatomy
Although yawning is usually associated with sleepiness and relaxation, it can actually indicate sexual arousal or hunger. Another theory of yawning is that it's the body's way to take in more oxygen to dispense with excess carbon dioxide. Yawning is also strangely contagious and can be shared amongst groups of people.Full Answer >
Strong abdominal muscles are required to take a punch to the gut, as well as contraction right before the strike. There are many exercises suited to the task of developing core strength using only body weight. Weights can be added for further improvement in abdominal strength.Full Answer >
A normal heart ejection fraction refers to the volume of blood pumped out of the heart after each contraction, explains Dr. Martha Grogan, writing for Mayo Clinic. A heart ejection rate of 50 to 55 percent or more is considered normal, while a rate lower than 50 percent is considered abnormal.Full Answer >
Massage therapy is the practice of manipulating the muscles and connective tissue of the body to reduce tension, enhance blood flow, activate the relaxation response and promote healing. Massage therapists typically apply pressure to the soft tissue of the body by rubbing the muscles with their hands and fingertips.Full Answer >