Nidra Charya

 The fourth stage is the most unique stage as this is the stage when we have vivid dreams. Our eyes rapidly move behind the eyelids and brain activity is heightened. At this stage, brain activity is very similar to when we are awake.  A total of 25% time of our sleep is occupied by REM sleep. Good quality of REM sleep is necessary for good memory and learning efficiency. This sleep stage is also responsible for neural development. This is another reason why we shouldn't make a habit of sacrificing our sleep aiming to boost our learning efficiency, as though in short term, more work can be done, but in the long term our overall cognitive ability is compromised.  It is not at all necessary to worry about individual sleep stage duration. As long as we get an appropriate duration of over all sleep, our body will automatically manage the individual stages. Exceptions to this are when suffering from sleep disorders like apnea, or, consuming alcohol can adversely impact REM slee...

  So, the first stage! Its a very mild stage that lasts 5-7 minutes at an average, provided you are not disturbed. A person is easy to wake at this stage, so annoying siblings stay away👿. The body is not fully relaxed, though physical and mental activity slows down. So while a person technically gets slow and stupid the laze is beneficial to both the mind and the body. In CONTROLLED, RATIONAL DURATIONS! Remember. This stage is NREM(no rapid eye movement) and occupies the least duration of your sleep. Stage 1 is followed by stage 2, as the person begins to go into deeper sleep. This stage is marked by a drop in body temperature. It lasts around 25 mins in the first cycle and progressively gets longer. Ultimately, it comprises almost half of your sleep duration (around 45%). After stage 2, a person falls into N3(stage 3) sleep. At this point, it is tough to wake someone up. Physically and mentally, a person becomes even more relaxed, along with decreased blood pressure and breathing...