<br><div><img src="https://www.washingtonpost.com/wp-apps/imrs.php?src=https://cloudfront-us-east-1.images.arcpublishing.com/wapo/TDV2A7UMQCCWCEC62VLU6XN52I.jpg&w=1440" style="width: 100%" /><div>It’s never too late to start building muscle power, a leading exercise researcher says.</div></div>