It sounds like a dilemma, but actually is not when you think deep.
Focus and work on one task at a time is not easy, it is challenging to calm down and focus. It is also not easy to focus on physical training, like workout. During this transition from excited mode to focused mode, time flies slowly.
Surprisingly, after you have switched your mode and start to focus on your one task. Time flies really fast and enjoyable. And you are dedicating all your talent and energy to solve the task, which process is enjoyable and rewarding. You grew fast in the focus mode.
—Negentropist.Z
熵逆 