C1 Unit 4 Fit as a fiddle

https://idioms.thefreedictionary.com/fiddle FIDDLE- IDIOMS

https://english.best/tests/comparisons-with-as-as/  COMPARISON WITH AS .... AS

https://www.npr.org/2017/01/08/508765671/what-doesnt-kill-us-invites-practical-medical-benefits "WHAT DOESN'T KILL US", BY SCOTT  CARNEY

https://www.ihbristol.com/useful-english-expressions USUFUL EXPRESSIONS

https://www.npr.org/sections/fitness-nutrition/ FITNESS & NUTRITUTION

https://www.nhs.uk/news/ BEHIND THE HEADLINES - NHS

https://www.who.int/  WORLD HEALTH ORGANIZATION

https://www.bbc.co.uk/programmes/b01mdl65 BBC Radio 4  Cosmetic Surgery. Following the PIP breast implants scandals, has the cosmetic surgery industry cleaned up its up?

https://www.npr.org/sections/health-shots/2020/01/11/795010044/feeling-artsy-heres-how-making-art-helps-your-brain  NPR Feeling Artsy? Here's How Making Art Helps Your Brain

https://www.publicradiotulsa.org/post/joy-missing-out-finding-balance-wired-world  "The Joy of Missing Out: Finding Balance in a Wired World"

https://www.nature.com/articles/s41598-019-54311-x NATURE-  Light therapy with boxes or glasses to counteract effects of acute sleep deprivation