The benefits of good posture

conclusive /kənˈkluː.sɪv/ adjective
proving that something is true, or ending any doubt
They had conclusive evidence/proof of her guilt.
a conclusive argument
fleeting /ˈfliː.tɪŋ/ /-t ̬ɪŋ/ adjective
short or quick
a fleeting glimpse
speculation /ˌspek.jʊˈleɪ.ʃ ə n/ noun
when you guess possible answers to a question without having enough information to be certain
Rumours that they are about to marry have been dismissed as pure speculation.

9. 
   WHAT WOULD HAPPEN IF YOU DID NOT SLEEP?
   

cope /kəʊp/ /koʊp/ verb [ I ]
to deal successfully with a difficult situation
It must be difficult to cope with three small children and a job.
moody /ˈmuː.di/ adjective
If someone is moody, they are often unfriendly because they feel angry or unhappy
a moody teenager
uncoordinated /ˌʌn.kəʊˈɔː.dɪn.eɪ.tɪd/ /-koʊˈɔːr.dɪ.neɪ.t ̬ɪd/ adjective
with different parts failing to work or move well together
The marketing campaign was an uncoordinated effort by several different departments.
paranoid /ˈpær. ə n.ɔɪd/ /ˈper.ə.nɔɪd/ adjective
1. feeling extremely nervous and worried because you believe that other people do not like you or are trying to harm you
He started feeling paranoid and was convinced his boss was going to fire him.
hallucinate /həˈluː.sɪ.neɪt/ verb [ I ]
to seem to see, hear, feel or smell something which does not exist, usually because you are ill or have taken a drug
Mental disorders, drug use and hypnosis can all cause people to hallucinate.
imbalance /ˌɪmˈbæl. ə n t  s/ noun [ C ]
when two things which should be equal or are normally equal are not
There is huge economic imbalance between the two countries.