Since the start of the COVID-19 pandemic，many people have to stay at home.Online classes and working from home （1）

mean

mean

a lot of sitting.We already know that if we don't move much.jye.ai get fatter and heart problems.And new studies have shown that it is （2）

bad

bad

for our mental（心理的） health，too.
   A study of 937 Brazilian adults during the pandemic found that about one-third of them sat around for more than 10 hours per day.It reported that people who sat （3）

without

without

moving for too long might get depressed（抑郁的）.
   （4）

Another

Another

study looked at children.It found that each extra hour of sitting time at ages 12，14 and 16 led to higher depression grades by age 18.Eighteen-year-olds who sat most often had depression grades 28% （5）

higher

higher

than those who were more outgoing.
   Scientists are not sure yet about the connection between too much sitting and depression.But according to Mats Hallgren，" sitting for too long can slow blood flow（流動(dòng)） in the body，（6）

including

including

blood flow to the brain."It might also affect the growth of neurons（神經(jīng)細(xì)胞） in the brain.And couch potatoes，who spend a lot of time sitting and watching TV might do other unhealthy things while sitting，such as eating junk food.All these may lead to depression.
   The good news is that it's easy to overcome.Aaron Kandola from University College London，said " all types " of movement might （7）

help

help

，even small activity，" It is great to exercise and play sports，" said Kandola." But（8）

anything

anything

you can do to avoid（避免） sitting for too long will help with mood，stress and thinking clearly."The key message is just to move more often.