SwimTherapy for Avascular Necrosis Patients – Part 1
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Treatment Category: 
Physical Therapy
Treatment Summary: 

Doctor supervised exercise of joints with Avascular Necrosis / Osteonecrosis is critical to preventing a whole host of negative effects. Most importantly, some exercise and use helps to counter bone density loss and spurs the bone's natural healing process into action. Swimming is a fantastic frequently prescribed physical therapy for AVN patients, especially patients with lower extremity AVN.

Potential Benefits: 

Swim therapy is a comparatively safe and effective physical therapy option for Avascular Necrosis / Osteonecrosis patients wishing to rehabilitate AVN affected joints. Potential benefits include:

  • Low impact
  • Safely variable resistance
  • Low weight-bearing
  • Stamina and strength building
Potential Risks: 

Risks of swim therapy are very low compared to other available physical therapy options. Though, of course, this series of articles assumes that you have talked to your doctor and have consequently been referred to a physical therapist trained in pool therapy.

Treatment Details: 
About Pool Physical Therapy
If you are a patient who has not considered this option, you might be surprised to learn that finding pool-based therapy is normally relatively easy since most physical therapy centers have programs that utilize swimming pools in some capacity. Even if the therapy center does not have a pool on-site, it may have off-site arrangements with a pool nearby.
 
Basic pool therapy can be exercise and range of motion work in the water under the guidance of a physical therapist. Simple exercises such as kicking, bending, and squats in the water are tremendous starts for patients encumbered by incapacitating AVN. More advanced pool therapy options begin to work into various types of swimming as a way to build stamina and strength. This series of articles, which will be published in multiple parts, will detail practical and helpful information to aid AVN patients wishing to get the most out of swim therapy specifically.
 
Pain Management
Of course, the major issue for many AVN patients is that exercise of an AVN afflicted joint is often either severely painful or restricted by lesion location, size, or state of decay. Swim therapy helps circumvent these normal exercise limitations by virtue of that fact that water reduces the stresses of weight-bearing and allows a safe and controllable resistance. Simply exert less effort to reduce joint stress, or exert more effort to work the muscle groups harder. Patients who have difficulty with land-based physical therapy often find that swim therapy results in less pain, less joint stress, and thus better healing.
 
Exertion Sneak Attack
When just getting started with swim therapy, the first and most important recommendation is to take it very slow and easy initially. Exercise in water has the deceptive ability to feel tolerable at the time but then hit you with complete exhaustion later. Take your time in learning your limits and how the aftereffects of swim exercise will present.
 
Balance Problems
Some patients are surprised to learn how seriously Avascular Necrosis of a joint can disrupt swim balance and coordination. Even previously expert swimmers now affected by AVN try to swim away with the grace of an aquatic animal only to partially sink and choke on mouthfuls of water. Weakened joints and muscles definitely disrupt balance and coordination. Lower extremity AVN can affect the legs to such a degree that patients find it hard to balance the body flat while attempting to swim. In fact, many patients wishing to workout with swim therapy need to go back to the basics and learn to swim all over again.
 
Drills to Isolate Problem Areas
If you are having trouble swimming due to balance, coordination, or strength issues, the best first step is to perform a number of drills that help isolate the individual components of swimming to identify problem areas. Even if you think you know the nature of the problem, these drills can help uncover enlightening and very helpful details. 
  • Kick-board to isolate legs – Try swimming by holding a kick-board and using just your legs. Be sure to point your toes out, swivel at the hips, and try to keep your legs straight. Are you able to develop momentum? Patients with lower-extremity AVN may find their legs so weak that leg kicking does not generate much forward propelling force.



     
  • Pull Float/Pull Buoy to isolate arms – Try using a pull float, also called a pull buoy, which is a small flotation device that can be clamped between the thighs or legs while swimming. Do not kick with using a pull float. The idea is to isolate the swimming motion to just the arms. Do you feel a difference in your momentum while using a pull float? Do you find your body in a different position in the water than without it?



     
  • Back-stoke – Try swimming back-stroke style and see if there are any perceived differences in pain, exertion, or swimming ability. AVN patients incapacitated by the disease spend a lot of time lying on their backs. As a result, these patients tend to have developed muscle groups such that swimming back-stroke is much easier than free-style.
  • Free-style slowed down – Try swimming the free-style crawl method in a slowed-down manner, drawing out the strokes as slow and as long as possible. Use alternate breathing every 3 strokes if capacity permits. Pay close attention to the slowed-down motion. Are there particular problems more evident now?
 
If you have worked on and completed the drills, hopefully you are now armed with a better understanding as to the nature of the challenges before you. Don't be discouraged if swim therapy does not come as easily as you might have liked or expected. A former triathlete who was interviewed noted that recovery from double-knee Avascular Necrosis required literally learning to swim all over again by starting back at the most fundamental basics.
 
To come: Swim Therapy part II, mastering breathing and balance.
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