always. If you think your going to strain your mussles then you should stretch. even then you should stretch so you don't hurt your self.
I'd recommend the DVD "Ultimate Stretch Yoga Workout". It centers on various yoga stretching exercises, and it shows stretch exercises you can do for every part of your body. It's simple enough that you should be able to keep up with it even if you haven't done yoga before.
You should try websites like runnersworld.com and livestrong.com to get the best running exercises best fit for you and remember to stretch before and after.
If the lower ab exercises are being done properly they should not strain the back. It is important to stretch prior to doing the exercises or the likelihood of straining the back will increase.
First, you should try to stretch out your toes by pulling them back out and that will give it a good stretch for less pain. Then do foot exercises and spin your feet around in any direction.
You should always stretch before working out. Failing to stretch properly before a workout will result in injuries. Shin splints are a common injury for runners and they are frequently a result of not properly stretching out. "Mountain climber" exercises are a great way to improve agility and speed.
It is a series of exercises designed to stretch, tighten and tone the muscles of the body.
You should always warm up and stretch. First, run in place or do some jumping jacks. Then, do stretches relative to what you will using in the workout.
Top back pain exercises are exercises in which one uses weights to strengthen the top and upper back, resulting in the easing of pain in these areas.
it is important to stretch out your muscles so you don't pull a muscle
show some good trapezius exercises for people who are constantly keyboarding
The spinal stenosis exercises and frozen shoulder exercises is the best hamstring stretch for the post nantle woman.
The only way to stretch your hamstrings and keep them that way is to stretch them as much as possible and then immediately do exercises involving your thighs. (Climbing stairs etc.)