Stretching
Why Stretch?
Stretching is very important and needs to be taken to place every time you are about to do any sort of exercise or activity. It increases your flexibility and it helps your muscles maintain its job well.
How?
There are many different ways you could stretch.
1. Lower back - Stand up, put your feet 6 inches apart, and bend down touching your toes. (If you can't, just try to reach the farthest you can) Make sure to try and keep your legs straight.
2. Thighs - Butt on the ground, bend your knees horizontally and try to bring them in as much as you can. This can stretch out the thighs very nicely.
3. Arm Rotation - This is one of the easiest. You rotate both arms back, or forward. Try using muscle when doing this.
4. Abs - Stretching the abs can be used if there is an ab-related workout. To be safe, stretch it out anyway. Lay on the ground face down, then try to push your arms off the ground until your chest and stomach is up but keep the lower part of your body on the ground, and you should feel a stretch.
There are many more. You can always try different stretches yourself. Try to focus on what part of your body you will be using the most when doing a certain exercise.
When?
You should always stretch before and after a workout. This is important and recommended for everyone. All the good coaches out there make sure you stretch before a game, which is what they are supposed to do.
If you get a muscle-ache badly, and you've been doing the same type of workout everyday, you probably did not stretch out good enough!

