All articles tagged with #exercise physiology
A mouse study shows B cells, beyond their immune role, may regulate muscle endurance; mice with reduced B cells or treated to deplete them showed decreased running endurance, suggesting an unexpected bridge between the immune system and exercise metabolism.
Scientists have discovered that vampire bats use blood-derived amino acids as their primary energy source, rather than carbohydrates or fats, to fuel physical activity. This was determined by observing the bats on treadmills and measuring their metabolic activity. The study found that the bats rapidly oxidize amino acids from their blood meals, similar to bloodsucking insects, highlighting a unique adaptation among mammals.
A new study reanalyzing lung-function tests found that about a third of healthy adults experience air hunger during all-out exercise, with the fittest people being most susceptible. This feeling, associated with lung conditions, can limit performance and is linked to a negative emotional response. The study suggests that fitter individuals may push themselves harder, reaching their breathing limits, and raises questions about the factors determining air hunger and potential interventions, such as training breathing muscles or using asthma medication.
Contrary to popular belief, lactic acid is not responsible for muscle soreness after exercise. Research shows that the discomfort is caused by a buildup of pressure and chemical by-products in muscle cells, leading to microscopic damage and delayed onset muscle soreness (DOMS). This soreness has nothing to do with lactic acid or lactate, and the good news is that muscles adapt rapidly to reduce discomfort with regular activity. It's important to train gradually and consistently to prevent DOMS and enjoy exercise more, while removing the myth of lactic acid's role in muscle soreness from exercise vocabulary.