Teen years.
If you wait, it could be too late.
It's important now because in the long run, you won't have major signs of arthritis or common back problems.
Sedentary<span> lifestyle. ... </span>Sedentary<span> activities include sitting, reading, socialising, watching television, playing video games, and computer use for much of the day with little or no vigorous physical exercise. A</span>sedentary<span> lifestyle can contribute to many preventable causes of death.</span>
Push-ups help your arms but sit-ups definitely help your stomach.
Blinking keeps your eyes safe from damaging
