Importance of stretching for a healthy body

It is a common thinking of people that they need to do hard physical activities only if want to lose fat from their body. They do not give importance to the little movements or stretching their bodies on daily basis. We normally spend a lot of hours while working in front of computers. Sitting idle makes our body lethargic and slow. This also tends increase in body weight.
To avoid this one should prevent sitting at one place for a long time and adopt few stretching exercises. Few tips are as follows:
(1) Stand up and rotate your arms in clockwise and then anticlockwise. Do this for 10 times each.
(2) Stand straight. Rotate your waist both clockwise and anti-clockwise as well.
(3) Move your neck towards right then left and then right again. Do this atleast 5 times. This stretches the neck muscles. As while working on computers it is neck muscles that get under tension much.
(4) When get time never loose any opportunity of moving your body. You can go to wash room and rotate your hands, waist in any way....if not then do 10-15 jumping there. No one is seeing you and your are doing good to your body.