Endurance training for six weeks in humans and mammals has been shown to increase mitochondrial content from 30 to 100 percent and volume density up to 40 percent.
A researcher posing as a 15-year-old football player called 244 health food stores across the United States and asked if they would sell him protein supplements to give him larger muscles. More than two-thirds of sales attendants at the health food stores recommended that he buy the protein supplement, creatine.
When you exercise, sugar is broken down into different chemicals, to produce energy for muscles. As long as you get all the oxygen you need, the final products are carbon dioxide and water, but if you exercise so vigorously that you can't get the oxygen that you need, the reactions stop, causing a chemical called lactic acid to accumulate in your muscles and spill into you bloodstream.
Many studies show that exercise helps to prevent heart attacks, and it may do so by changing the bacteria in your colon. A recent study from Finland shows that exercising for just six weeks can increase healthful anti-inflammatory bacteria in your colon.
Your brain does send an electrical impulse along nerves that enter muscles to cause them to contract. The electrical impulses generated by ab machines are so weak that they can't possibly cause contractions that strengthen muscles significantly. If they did give you enough electricity to strengthen your muscles, they would give you a very painful shock.
In a review of 37 studies of men and women over 60, researchers found that a proper exercise program enlarged and strengthened the muscles in 93 percent of the participants (Osteoporosis International, March 1, 2017).
"Cooling down" means that after you exercise intensely, you slow down and exercise at low intensity for a while before you stop exercising for that session. The scientific literature is controversial on whether cooling down helps to reduce next-day muscle soreness to help muscles to recover faster.
In 1812, Napoleon attacked Russia with 453,000 men, but after he withdrew from Moscow, the harsh cold winter reduced his "Grande Armee" to fewer than 10,000 fighting men. The vast majority of Napoleon's soldiers were not killed by the Russians. They died of hypothermia, a severe drop in body temperature. If you dress properly...
The best way to train for skiing is to ski, but snow isn't always available. To prepare for a skiing vacation, you need to strengthen both your heart muscles and your skeletal muscles. You can strengthen your heart for skiing with any exercise that will raise your heart rate for at least 10 minutes,...
When former NBA player Kent Benson arrived at the University of Indiana he could jump only nine inches off the ground. That's an embarrassing jump for a seven-foot All- American. One year later, he was able to jump three times that high because he had a good coach. How high you can jump is determined...
Countless studies have shown that exercise helps to prevent heart attacks, but some researchers have found scarring in heart muscle and increased plaques in the heart arteries of men who have run many marathons and triathlons, resulting in news headlines warning of "too much exercise."
Good bacteria that live in your gut can help to keep you healthy, while the bad colon bacteria increase your risk for heart attacks, strokes, diabetes, certain cancers and autoimmune diseases. Exercise encourages the growth of good bacteria in your colon and reduces the number of bad ones.
If you want to become fit and use exercise to help prevent a heart attack, first check with your doctor to make sure that you do not have anything wrong with your heart or blood vessels. Intense exercise can increase your risk for a heart attack if you already have a damaged heart.
Almost 50 percent of North Americans over 85 and 13 percent of those over 65 suffer from Alzheimer's disease (Alzheimer's Assoc Facts and Figures, 2018). We know that you lose brain cells as you age, and scientists used to think that you could not make new brain cells. However, an exciting new study from Columbia University suggests that you can make new brain cells as you age, and that loss of brain function may be caused by lack of adequate blood flow and nourishment of brain cells.
Many exercise programs and tests used to measure heart function are based on an unreliable MAXIMUM HEART RATE formula that predicts the fastest your heart can beat and still pump blood through your body. Although this formula is the golden standard used today, it is not based on science.
A study from the University of Copenhagen shows that wearing an immobilizing knee brace for just two weeks caused men in their 20s to lose 22 to 34 percent of their leg muscle strength, while men in their 60s lost 20 to 26 percent.
Sleeping can help to prevent exercise injuries. Healthy U.S. soldiers in training are less likely to suffer exercise-related injuries such as fractures, sprains and muscle strains when they sleep at least eight hours at night.
A study in mice suggests that having low levels of vitamin D may harm athletes and exercisers by limiting how long they can exercise. Many exercisers and competitive athletes are vitamin D deficient even if they live in the sunbelt.
When you run very fast, you reach a point where you gasp for breath. You keep on pushing the pace and after a few seconds, you feel that you have recovered and that you can pick up the pace again. It’s called second wind and your apparent recovery is caused by lactic acid.
Sit ups strengthen your belly muscles, provided that you know how to do them. Lie on your back with your knees bent with your soles on the floor. Place your hands on your chest and slowly raise your head off the ground. Then, slowly raise your shoulders off the ground to a height...
Committed exercisers should try to continue to exercise during this COVID-19 pandemic, but they should realize that both too much exercise and exercising while sick increase risk for medical complications, such as irregular heartbeats, and death
Whether you're out of shape or very fit, spinning classes can help you improve. You ride a stationary bicycle in a group, with a leader who tells you what to do and plays lively music to set the tempo. Many health clubs and gyms offer these classes, and I recommend them to all of...
All maximum heart rate formulae are based on averages. They can be used to help you plan and monitor your exercise program, but they should not be interpreted as absolute limits or goals. Your maximum heart rate may differ from these averages. Whether you are a competitive athlete or an ordinary exerciser, you really do not need a heart rate monitor.
Scientific American has a fascinating article that explains why you should exercise your brain while you exercise your body. There is evidence that you may be able to make You can make new brain cells as you age by exercising your skeletal muscles and brain at the same time
Cycling is a power sport. The stronger you are, the faster you can go on a bike. Power = [force that your feet apply to the pedals] x [cadence, or how fast you spin your pedals]. Cadence is the number of pedal revolutions per minute (RPMs). Fatigue for a bicycle rider comes primarily from how hard you press on the pedals, not how fast you turn them.
The most common cause of knee pain in bicycle riders is having the seat set so high that it forces you to fully straighten the knee as the pedal reaches its lowest level. You are never supposed to fully straighten your knee when you do any kind of exercise, particularly cycling or running.
Many body builders and weight lifters are overly concerned about what they eat and what food supplements they take. If you want to grow larger and stronger muscles, you should concentrate on lifting weights, but you can help muscles grow larger by understanding how what you eat affects how you recover from hard exercise....
The most common cause of belly cramps during exercise is having a full colon. The best way to prevent exercise-induced belly cramps is to completely empty your colon before you start to exercise. Belly cramps are rarely caused by having food in your stomach. To meet their energy needs, bicycle racers have to eat...