The difference between sleeping 6 hours and 8 hours every day is a shock

ring  title below the combat network,
focus on 46 year old Sarah Chalmers attended a school sleep experiment in London,
for five consecutive days,
just 6 hours of sleep and sleep 8 hours full face of CF.
Global fitness center,
WeChat |jszones,
come to me with a muscle revolution! Long attention according to the two-dimensional code recognition