BBC 6 Minute English - Do adults exercise enough?

source: Chau Pham    2017年10月5日

vigorous: using a lot of energy to do something
saunter: walk slowly
brisk: quick and energetic (the opposite of sauntering)
build something in (to your day or your life): include it from the beginning
incrementally: gradually increasing in size
sedentary (job or life): it involves a lot of sitting and not much exercise