Assertion: laughter | /r/CapableOf | exercise muscle
Facets:
Source sentences:
text: It's believed that laughter improves circulation, stimulates the immune system, exercises muscles, reduces stress hormones and alleviates depression and anxiety [sources: Kanigel, Laughter Yoga
text: In a series of studies, Fry and his colleagues found that laughter increases circulation, stimulates the immune system, exercises the muscles, and even invigorates the brain.