B2.2 10-10-18

speaking test

Sitting is killing you

https://www.mindbodygreen.com/0-11907/why-sitting-is-killing-you-9-things-you-can-do-about-it.html

https://edition.cnn.com/2017/09/11/health/sitting-increases-risk-of-death-study/index.html

Calisthenics

https://www.youtube.com/watch?v=sxCeGmVWNw0