By performing warm-up routines, you actually do literally just that – warm up the body. Internal body temperature can't raise by a large amount, or you would have all the symptoms of a fever. Nevertheless, the temperature in the muscles can, and should, be raised slightly in order to dilate blood vessels and loosen muscles.

That dilation leads to greater blood flow, which helps oxygenate muscles and remove the waste products of cellular activity. Warm muscles are looser, more supple and flexible. That reduces stiffness and lowers resistance to larger movements. That helps reduce the risk of injury and prepares the body for high-performance activity.

A good warm-up also raises the heart rate, respiratory capacity and the overall metabolic level. Among other benefits, this helps deliver nutrients to muscles that will be useful for the workout to come. Warm-ups help lubricate joints, too, as well as lowering the risk to stretched tendons and tears.

No matter what kind of sport or workout you favor, having a well-functioning cardiovascular system and supple joints and muscles are essential for peak performance and low risk of injury.

A 10-15 minute warm-up period, including static and dynamic stretching activities, should be a low-intensity version of the routines that will be undertaken when the warm-up is complete.

Focus the non-stretching aspect of your warm-up more on the specific types of movement called for by the sport or activity you plan to engage in. If you plan to jog five miles, take a brisk walk, followed by a few gentle laps of a hundred yards or less. If you plan to play tennis or golf, spend a few minutes on low-speed, low-impact swings.

As you progress through the warm-up, gradually increase the speed and range of movement. This helps prepare the body and mind both.

Making the increase gradual helps increase the cardio and lung systems, and slowly cranks up needed body chemicals systems without depleting them. It helps gear up the mind for a high performance routine or sports event, in a way that static or even dynamic stretches won't.

Like any physical activity, don't overdo it. Don't warm-up too much or too fast. The idea is to prepare the body for a workout, not perform one.

At the end, you'll be ready to perform the sport or workout of your choice at peak level with minimal risk of injury.

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Your overall goal is to attain good range of motion, while gradually extending that range to a degree appropriate to your fitness level and body type. There are several different ways to accomplish that goal, and you should use at least a few of them before every workout.

Warm-ups are fundamental. Cold muscles are much more likely to tear and lead to stretched or torn cartilage and other harmful results. Warm-ups and stretches help produce the fluid that lubricates the joints, and it helps the muscles become more elastic. Those both lead to safer, higher performance workouts.

Ten to fifteen minutes is the minimum for most people. This can be done by low-impact jogging in place, simple stretches and other techniques.

Static stretching, for example, is the old-fashioned stretch and hold for 30 seconds. This should be done with the arms, trunk, legs and neck. Dynamic stretching and ballistic stretching involve more active, bouncing-style or weight-assisted stretching, sometimes with extra force applied. Both types are helpful.

Some dynamic stretches involve holding the arms out to the side, then swinging them back and forth across front of the body, repeating for 30 seconds. Another technique involves using a short bar across the neck, lying on the shoulders. Place your hands on the bar, then bend slowly left, then right, moving the head toward the outer edge of the foot.

Abdominal muscles can be prepared by lying backwards on a large rubber ball. Push back slowly and raise the arms above your head. Repeat 10 times. Loosen your hamstrings by lying on your back, and raising one outstretched leg using a large towel wrapped around the foot. Grab the ends and pull up slowly. Switch legs, then repeat for 10 reps.

A full back stretch is accomplished by lying on your back and bringing both knees to the chest, hands clasped behind the knees. Roll forward until your feet hit the floor, then roll back until the head touches. Do 10 rolls.

Groin stretches can be done safely by using a large rubber ball. Place one knee on the ball and slowly rotate the ball a few inches away from your body. Move the ball back toward your body, then switch legs. Do 10 movements.

Both the legs and back muscles can get a good warm-up stretch by doing toe taps. Stand up straight, feet apart about shoulder width. Lean forward, touching the big toe on one foot with the opposite hand – left hand to right foot, and vice-versa. Those with lower back problems should consult a trainer or physician before attempting these.

For maximum flexibility, stretching routines should be carried out at least a few times per week. This will help maximize the range of motion and decrease the potential for injury.

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