Our muscles get stronger when put under stress and now robot ones could do the same, thanks to a soft gel that becomes harder when exposed to vibration
Source:
https://www.newscientist.com/article/2268652-soft-gel-could-power-robot-muscles-that-grow-stronger-with-a-workout/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home