Some of these barriers will never relax.

FORBES: Do Tariffs Protect an Infant Industry?

Our regiment's units were fighting nearly all the time in the mountains and we could never really relax during the quiet periods.

BBC: NEWS | South Asia | Moscow's Afghan war: The interpreter's story

According to de Rond, although there are days when no casualties come in, because the surgeons are on call around the clock, they can never really relax.

CNN: Is workplace boredom 'the new stress?'

With new popularity and success, he has learnt to relax, smile, even joke, though he will never be the back-slapping type.

ECONOMIST: Lionel Jospin, escape artist

No, say others, who argue most will never tweet, let alone check-in, or chat, or vote, when they just want to relax with some TV.

FORBES: Social TV Data Is Not The New Nielsen: How It Might Be Better