ESL Blogs

Everybody needs different amounts of sleep.  Some need more, some need less.  But the average is around 8 hours
If you don't get your 8 hours one day, you may feel a bit tired, but you'll be OK.  But it is true that if you consistently don't get enough sleep every night -- even one hour less every night, you can accumulate "sleep debt" over a two-week period (your body resets after two weeks) where you will feel extremely tired, sluggish, unfocused, etc