Muscle Spasms and Cramps - What Causes Painful Muscle Spasms and Cramps

Research may explain the cause of muscle spasms and cramps

By Elizabeth Quinn, About.com

Updated: June 12, 2009

About.com Health's Disease and Condition content is reviewed by the Medical Review Board

If you've ever had muscle spasms or muscle cramps, you know they can be extremely painful. In some cases, a muscle may spasm so forcefully that it results in a bruise on the skin. Most muscle spasms and cramps are involuntary contractions of a muscle. A serious muscle spasm doesn't release on its own and requires manual stretching to help relax and lengthen the shortened muscle. Spasms and cramps can be mild or extremely painful. While they can happen to any skeletal muscle, they are most common in the legs and feet and muscles that cross two joints (the calf muscle, for example). Cramps can involve part of a muscle or all the muscles in a group. The most commonly affected muscle groups are:

• Back of lower leg / calf (gastrocnemius).
• Back of thigh (hamstrings).
• Front of thigh (quadriceps).
• Feet, hands, arms, abdomen

• Muscle cramps range in intensity from a slight twitch or tic to severe pain. A cramped muscle can feel rock-hard and last a few seconds to several minutes or longer. It is not uncommon for cramps to ease up and then return several times before they go away entirely.

  What Causes Muscle Cramps

  The exact cause of muscle cramps is still unknown, but the theories most commonly cited include:
• Altered neuromuscular control
• Dehydration
• Electrolyte depletion
• Poor conditioning
• Muscle fatigue
• Doing a new activity

  Other factors that have been associated with muscle cramps include exercising in extreme heat. The belief is that muscle cramps are more common during exercise in the heat because sweat contains fluids as well as electrolyte (salt, potassium, magnesium and calcium). When these nutrients fall to certain levels, the incidence of muscle spasms increases. Because athletes are more likely to get cramps in the preseason, near the end of (or the night after) intense or prolonged exercise, some feel that a lack of conditioning results in cramps.

  Research Supports Altered Neuromuscular Control as the Cause of Cramps

  While all these theories are being studied, researchers are finding more evidence that the "altered neuromuscular control" hypothesis is the principal pathophysiological mechanism the leads to exercise-associated muscle cramping (EAMC). Altered neuromuscular control is often related to muscle fatigue and results in a disruption of muscle coordination and control.

  According to a review of the literature conducted by Martin Schwellnus from the University of Cape Town, the evidence supporting both the "electrolyte depletion" and "dehydration" hypotheses as the cause of muscle cramps is not convincing. He reviewed the available literature supporting these theories and found mostly anecdotal clinical observations and one small case–control study with only 10 subjects. He also found another four clinical prospective that clearly did not support the "electrolyte depletion" and "dehydration" hypotheses as the cause of muscle cramps. In his review, Schwellnus concludes that the "electrolyte depletion" and "dehydration" hypotheses do not offer plausible pathophysiological mechanisms with supporting scientific evidence that could adequately explain the clinical presentation and management of exercise-associated muscle cramping.

  He goes on to write:

  "Scientific evidence for the "altered neuromuscular control" hypothesis is based on evidence from research studies in human models of muscle cramping, epidemiological studies in cramping athletes, and animal experimental data. Whilst it is clear that further evidence to support the "altered neuromuscular control" hypothesis is also required, research data are accumulating that support this as the principal pathophysiological mechanism for the aetiology of exercise-associated muscle cramping (EAMC)."

  Treating Muscle Cramps

  Cramps usually go away on their own without treatment, but these tips appears to help speed the healing process:
  • Stop the activity that caused the cramp.
  • Gently stretch and massage the cramping muscle.
  • Hold the joint in a stretched position until the cramp stops.

  Preventing Muscle Cramps (Good stretches help you out!!)
  

  Until we learn the exact cause of muscle cramps, it will be difficult to say with any confidence how to prevent them. However, these tips are most recommended by experts and athletes alike:
  • Improve fitness and avoid muscle fatigue
  • Stretch regularly after exercise
  • Warm up before exercise
  • Stretch the calf muscle: In a standing lunge with both feet pointed forward, straighten the rear leg.
  • Stretch the hamstring muscle: Sit with one leg folded in and the other straight out, foot upright and toes and ankle relaxed. Lean forward slightly, touch foot of straightened leg. (Repeat with opposite leg.)
  • Stretch the quadriceps muscle: While standing, hold top of foot with opposite hand and gently pull heel toward buttocks. (Repeat with opposite leg.)

  Most muscle cramps are not serious. If your muscle cramps are severe, frequent, constant or of concern, see your doctor.

  _Sources:

  _{Cause of Exercise Associated Muscle Cramps (EAMC) — altered neuromuscular control, dehydration or electrolyte depletion? M. P. Schwellnus. British Journal of Sports Medicine 2009; 43:401-408.}

For Sore Muscles This Works Like Crazy

By Marc David (from the Build Muscle & Gain Weight Fast Guide)

As discussed in some previous articles, muscle soreness can be caused by three hypothesis( muscle damage, tissue damage, muscle spasms) resulting in cumulative micro trauma resulting in some type of cellular damage. At times, this can be the leading cause of overtraining and being uncomfortable for a few days after training.
Continual cellular damage over and over to the point where the body cannot recovery can result in overtraining.

Don't worry...

Here's a quick checklist for helping to reduce the amount of muscle soreness you may experience. You can use one or all of these the next time you feel a little too sore from your last workout.

Phase 1 - Pre Training Recovery

Leg Elevation:
Many of us stand or sit for long periods of time before going to the gym and training. This is a less than optimal condition because your overall circulation is less than ideal. What you can do is 20-30 minutes before you train, lay down with your feel against a wall or other object and get the blood back to your upper body and heart.
You'll improve your circulation especially when you train legs or your lower back.
If you want, you can take this opportunity to listen to music or take a quick nap and begin the mental transition into training.

Phase 2 - Recovery During Training

Rest Intervals Between Sets:
A great way to boost the intensity of any workout without changing a single thing is to decrease the rest time between sets. You'll instantly get more work done in less time. If you feel that the intensity is too high, you can increase the time between sets and help reduce the build up of lactic acid as well. The time you take to rest between sets has a significant impact on your next set as well as future performance.

Movement Between Sets:
Just think about it. It's like a warm up and cool down all over again but between the sets. Most people understand the importance of warming up before lifting weights. They also know about a proper cool down after working out.

But did you know that you can use those sample principles on a minute level in between your sets?

This movement not only serves as a 'transition' between an all out effort and recovery but it aids in better circulation and helps reduce the swelling of muscular tissues.

Periodization:
Remember that soreness can be caused by a few hypothesis (tissue damage, muscle damage, spasms). But did you stop to think that if you keep on training "heavy" you just keep on damaging the muscle at a micro level over and over without a change to recover?
Incorporating a light day or week into your training can help flush the area with new blood, reduce the formation of scar tissue and flush waste from the area.
Planning these type of workouts in your training program will speed up the time needed to recover as well as add variety to your program which in turn provides overall recovery.

Phase 3 - Post Training Recovery
My strong hunch is that most people will be unable to avoid soreness at some point and seek treatment.

So that's why there's a few ways you can help reduce the severity of soreness during your training as well as aid in the recovery process after your training.

Contrast Showers:
Done on your lumbar area, this involves using short bursts of hot and cold water to improve the circulation. You can further stretch during this time to flush new blood to the area.

Post Workout Nutrition:

Needless to say...

After your workout your body is in a prime time to devour nutrients. This is an ideal time to give it the protein it needs with the carbohydrates for energy recovery.

You see, if muscle soreness is caused by micro trauma resulting in cellular damage then obviously you want to give your body plenty of materials quickly to repair itself.

Proper post workout nutrition can reduce the amount of soreness you can experience.

Therapeutic Modulaities:

This can encompass such things as massage, sauna, whirlpool, chiropractic adjustments, acupressure and others are among the more popular therapeutic modalities. Make no mistake....

Recovery really begins when you leave the gym. Depending on factors such as your level of fitness, age, medical conditions, you may be wise to use some or all of these post workout recovery methods to speed up overall recovery.

There's no magic formula per se but anything you can do to help speed the recovery process will result in less muscular discomfort and quicker recovery for the next workout.

Have you heard that 90% gym-goers overtrain 90% of the time?

Could it be that simply "under-recovered" and could easily stand to train more if only they could recover quicker?

Sleep:

While there is not a set number of hours you need to sleep as that depends on the individuals schedule, personal preferences and level of stress it's still clear that sleep is vital to recovery.

This is the time your body repairs all that micro trauma.

If you aren't getting enough quality sleep, it can affect your overall recovery and body's ability to repair itself. That can lead to prolonged muscle soreness. The amount of sleep each person needs will vary.

Make no mistake about muscle soreness...

It's uncomfortable!

But using any or all of the above recovery methods you can significantly reduce the duration of muscle soreness.

More important than that...

Create a periodized program that helps to keep your body in a state of recovery and avoid overtraining.