Your internal clock is still suited to your actual time zone and you are in a different time zone thus you experience Jet lag.
HIIT workouts: All information at your doorstep
HIIT stands for High-Intensity Interval Training; an umbrella term for the short duration of high-intensity exercises with short recovery.
How to kick start a productive day
If you want to spend most of your days productively, always plan it out the night before or right when you wake up, planning your day will allow you to use your time wisely and focus on the task at hand.