A Woman Running on a Treadmill (IMAGE) University of Jyväskylä - Jyväskylän yliopisto Caption Physical activity was found to be positively associated with the maintenance of muscle mass during the menopausal transition. Credit University of Jyväskylä Usage Restrictions To photo to be used with this piece of news only. University of Jyväskylä to be mentioned. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.