Say "yes" to yogurt. The good bacteria in yogurt helps keep your intestines healthy, allowing them to absorb more nutrients from the foods you eat. And the more nutrients your cells have at their disposal, the greater your energy reserves.
Avoid trans fats. Foods like doughnuts, crackers, and chips raise levels of bad LDL cholesterol in the body. This narrows blood vessels, blocking the flow of oxygenated, energy-rich blood cells throughout the body.
Opt for whole grains. White bread and pasta spike blood sugar and burn away quickly, sapping energy as they go. Stick with whole-grain foods, which provide longer-lasting fuel.
Don't skip breakfast. Two major studies published in the International Journal of Food Sciences and Nutrition show that breakfast eaters not only feel better mentally and physically compared to people who skip breakfast, but they also tend to have a healthier lifestyle and are better at dealing with depression and emotional stress.
Have a cup of joe. In small doses, caffeine is a great energy booster, increasing mental alertness and even spiking sexual potency.
Just lose it. Whether you're packing an extra five pounds or 50, the further over your ideal weight you are, the less energy you ultimately have.
Go nuts. Almonds and peanuts are so nutrient dense that a single nut packs enough calories to heat up half a cup of water. Nuts are also high in magnesium and fiber, two proven energy boosters.
Get wet. According to a study in the journal Clinical Neurophysiology, splashing cool water on your face may restore energy even faster than other popular options, like drinking coffee.
Shake it up. The Journal of Applied Physiology reports that men who drink a high-protein shake after working out have more pep than men who refuel on carbs alone.
Clear your sinuses. Men with chronic fatigue are up to nine times more likely to suffer sinus problems than guys who have no problems breathing. An over-the-counter allergy medication may relieve the condition.
Call a buddy. There's more than a decade's worth of research showing that men who open up and talk about their lives with other people have more energy than men who keep their stress inside.
Get it on. In a 10-year-study of 900 men, U.K. scientists found that men who had sex the most often also had the best physical health and most overall energy.
Catch 40 winks. Been sneaking a nap under your desk? Good. The NIH found that power naps boost brain power, preventing burnout and significantly improving mental performance.
Scramble some eggs. Of all foods, eggs are the best provider of energy-boosting protein, according to the American Heart Association
Swallow some calcium. Calcium deficiencies sap muscle strength and lower physical endurance. The average guy needs at least 1,000 mg of calcium a day.
D up. You need vitamin D to maintain the proper balance of other energy-bolstering vitamins in the body. The best D sources? Fish and D-fortified skim milk.
Get a massage. Studies show that massage helps you conquer three serious energy drainers—anxiety, headaches, and muscle soreness.