Why warm-up?
The body does not respond very well going from inactivity to very intense activity. The cardio-vascular, musculo-skeletal, neurological and metabolic energy pathways need to be gradually stimulated in order to perform at an optimal level. Muscles that are warm have a much better ability to extract and utilize oxygen to produce energy. As muscles warm up, the enzyme activity level is increased. This means that fats and sugars are broken down more rapidly, and more energy and less lactic acid (the burning sensation) will be produced. This will of course, enhance your performance and increase your ability to burn fat!
Before you walk or run:
Start with a few simple moves to warm-up your ankles such as tapping your toes, heel raises, and ankle circles. Then, begin walking at a moderate pace and gradually increase your pace. If you intend to run, walk for at least 5 minutes and you will feel much better when you begin to run. Save stretching for the cool-down.
Toe lifts: A great exercise for reducing Shin Splints!!! Heel Lifts
Why cool-down?
Your body also does not respond very well going from intense activity to complete rest. Your heart, lungs, muscles, joints, and energy systems require a gradual cool-down to avoid blood pooling in the lower extremities, dizziness and to assist in the recovery process.
After you walk or run:
If you run, Your muscles are all warmed up at the end of your workout. This is the BEST time to work on your flexibility. Many people blow-off this part of the workout, but flexibility training is just as important as cardiovascular and strength training.
Classic Calf Stretch and Quad stretch (use something for support, don’t arch your back!)
Hamstring Stretch & Hip Flexor Stretches.
Two reasons to stretch:
1) Stretching reduces delayed onset muscle soreness (DOMS) which you typically experience 24-48 hours after a workout.
2) Good flexibility will improve your posture and reduce low back pain. If you are tight in either your hamstrings or hip flexors they will pull your back out of neutral alignment an force you into positions which will strain your low back muscles.