ABOVE: Participants in the exercise studyhether you’re peddling a bike, running on a treadmill, or hiking in the woods, regular aerobic exercise powerfully protects you from cardiovascular and metabolic disease. But the precise molecular mechanisms connecting regular activity to improved health have been unclear. A study published April 14 in  makes major gains in this understanding. Building off previous work on single bouts of exercise, researchers at Ghent University in Belgium found that when humans perform long-term training, histamine receptors are activated, improving a variety...…ABOVE: Participants in the exercise studyhether you’re peddling a bike, running on a treadmill, or hiking in the woods, regular aerobic exercise powerfully protects you from cardiovascular and metabolic disease. But the precise molecular mechanisms connecting regular activity to improved health have been unclear. A study published April 14 in  makes major gains in this understanding. Building off previous work on single bouts of exercise, researchers at Ghent University in Belgium found that when humans perform long-term training, histamine receptors are activated, improving a variety...WW…