Emotional state can be adversely affected when attempting to plan your day with precision to hours and minutes. Forcing yourself into a narrow time frame, we want to do more. However, it turns out far not always.
Often one is confronted with quite the opposite effect. Having a clear schedule of the day, say the scientists, denies the interest, enthusiasm. Suffers even the final result.
People living solely on a schedule turn even the rest. Instead, enjoy your free time, if any, and immerse yourself in the work, when required by the task.