A regular lack of sleep makes us feel exhausted right after waking up. Moreover, it’s one of the main reasons for gaining weight.

12. The wrong air temperature

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Although falling asleep in warmth is pleasant, the optimal temperature is 60-75°F (15-23°C).

Solution: Cover up with a light blanket, and change it to a warm one during the night.

11. Physical exercise

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A workout stimulates the nervous system, which is why falling asleep after going to the gym can be a problem.

Solution: Exercise no less than 3 hours before going to bed.