It may be an activity that is often taken for granted during exercises, but stretching is as important to any physical activity as, say, running or lifting weights. For one, stretching your muscles protect you from the risks of having to endure muscle strains or spasms.
Of course, the same cannot be said for when you injure yourself precisely because you were performing stretches. So, it should only follow that you have to be responsible enough to do stretches by your lonesome in a safe manner. How can you do so, though?