At the beginning of the week, you can make your hand to strengthen your motivation. However, as the days of the week progress, it may become difficult to keep your motivation and collect your attention.
Centuries ago, philosophers would have noticed that Epiktetus says that the power of attention and focus can easily disappear when attention is not taken in the 12th section of Discourses' fourth book,
"When you leave your attention briefly, do not make yourself believe that you can gather your attention again if you want it again later. But let it still be with you. "
What to do?
Of course it is not possible for you to study continuously or focus on the same thing for a long time. Breaking is important both in terms of body and mind. But you have to be enthusiastic about your work in the time you need to work and whatever you need to do it.