Scientific American Why Does Lactic Acid Build Up in Muscles? And Why Does It Cause Soreness? Expand Your World with Science Learn and share the most exciting discoveries, innovations and ideas shaping our world today.SubscribeSign up for our newslettersSee the latest storiesRead the latest issueG...
which facilitates breast milk production in new mothers, can pass from the placenta to into an infant's body. After birth, that in utero prolactin bath can cause a newborn to spontaneously lactate whether it's a boy or a girl, as both are bestowed the same breast anatomy during fetal dev...
During aerobic exercise, you breathe faster and deeper than when your heart rate is at rest. You're maximizing the amount of oxygen in the blood. Your heart rate goes up, increasing blood flow to the muscles and back to the lungs. During anaerobic exercise,your body requires immediate energy...
“Drinking rBGH milk would thus be expected to significantly increase IGF-1 blood levels and consequently to increase risks of developing breast cancer and promoting its invasiveness.” Even though organic milk is from cows that are not given antibiotics or rBHG, if you truly care about your ...
Widowhood:“widowhood is a astronomically importantrisk factor for cognitive decline and dementia” Abdominal obesity: women with an enlarged waist circumference have a39% increase in dementia risk Interestingly, in men, muscle mass is a more important predictor than body fat, but we do not yet kn...
Zone 2 training improves the body’s aerobic energy system, enhancing your ability to fight fatigue. When you exercise at a high intensity, your body’s demand for energy surpasses what the aerobic system can provide. This kicks off the production of lactate, a byproduct of high-intensity ene...
highest level of sustained intensity of exercise for which measurement of oxygen uptake can account for the entire energy requirement is known as theAnaerobicThreshold (AT). To review, this is the point there is a substantial increase in blood lactate. Again, this is known as theLactateThreshold...
If you’re reading this, and you’re saying to yourself that you want to increase your mastery of critical thinking, I promise you this much—you can do it if you’re willing to do the following: Start reading (see starter list, below). ...
Describe why CO_2 increases during exercise. Define the lower respiratory tract. Why must endurance, strength and power athletes be concerned about daily carbohydrate intake? a. Why does ventilation increase non-linearly (breakaway) with increasing intensity...
Explain how FEV1 would differ just after exercise relative to pre-exercise. a. Why does ventilation increase non-linearly (breakaway) with increasing intensity of exercise? b. Does exercise training affect the "ventilatory breakpoint"? If so, how? Ex...