But then the naysayers weighed in, reporting that such an exercise effect is just a myth.
Instead, it might be caused by yet another exercise effect — the body's efforts to repair subtle tissue damage from all that exercise.
What is it about mechanical signals that makes Roger Federer's arm so big?" At first, he assumed that the exercise effect came from a forceful impact — the pounding on the leg bones as a runner's feet hit the ground or the blow to the bones in a tennis player's arm with every strike of the ball.
Claude Bouchard, a scientist at the Pennington Biomedical Research Center in Baton Rouge, La., along with other researchers, investigated the exercise effect with conventional methods using a mouthpiece and nose clip or a ventilated hood to determine oxygen used and carbon dioxide exhaled.
However, despite no apparent exercise effect, the person by exercise interaction accounted for approximately 28% of the total variance.
Results revealed that moderate exercise significantly improved performance on the Stroop task, and also reduced food consumption during the taste test for appetitive calorie dense snack foods; there was no exercise effect on control food consumption.
But the exercise effect was seen irrespective of weight gain, and a woman's body mass index (BMI) and waist circumference had no bearing on the cancer-reduction benefits she received from regular exercise.
Thus, exercise effect on testosterone may have contributed to the increase in myofibers with greater satellite-cell numbers in young males.
bA statistically significant treatment (exercise) effect was found (p < 0.05).
Figure 2 shows the forest plots of the exercise effect estimate by category of injurious fall.
Interestingly, the exercise effect appeared to be confined to post-menopausal women with higher BMI levels.
