Не все участники замечали снижение

Не все участники замечали снижение своих показателей и не все могли здраво оценивать свою работоспособность. Особенно, в условиях современного мира, при постоянной социальной активности, кофеина и множества других факторов, которые помогают чувствовать себя бодрым, даже если это не так.

Results (English) 1:

Not all participants noticed reduction in their performance and not all could properly assess its health. Especially in today's world, with the constant social activity, caffeine, and many other factors that help you feel fresh, even if it is not.

Results (English) 2:

Not all participants noticed a decrease of their performance and not everyone could sensibly evaluate their performance. Especially in today's world, a constant social activity, caffeine and many other factors that help to feel cheerful, even if it is not.

Results (English) 3:

Not all of the participants very seriously reduced their indicators and not all could serve to evaluate their operation. In particular, in the context of the world today, with a constant social activity,Caffeine and a variety of other factors, which can help you feel energetic, even if this is not the case.