"Those who enjoy good delta sleep wake up the next morning feeling more relaxed, refreshed and alert," says psychologist Gregg Amore, Ed.D., director of counseling at Allentown College of St. Francis de Sales in Pennsylvania, and 1997 AAU Grandmasters Mr. America.
Enhances circulation.Weightlifters have a special advantage when it comes to alertness: As you know if you've ever spotted anyone on the bench press, faces turn red after a few good reps, an indication of increased blood flow to the extremities.Inside your head, that means more blood, carrying more oxygen-rich blood cells to the brain.
Heightens alertness.Research shows that exercise increases secretion of chemicals in the brain, such as norepinephrine, that serve as neurotransmitters, sending signals from nerve to nerve."The combination of the added oxygen, the boost in neurotransmitters, and better sleep sets up the chemistry that allows for greater mental sharpness, more rational thinking and the ability to cope rationally with life's stressful challenges," says Amore
sees it as an axiom that "the stronger you are, the greater your concentration and clarity.