
There is a disease process that leads to loss of height, spinal deformities, bone fragility, and a consequent increased risk of fractures. It affects over 50% of women at some point in their lives and as you've probably guessed, it is osteoporosis. Luckily, it is a highly preventable and reversible disease and each of us can do our part in reducing our own risk.
An understanding of a simple physiological principle called Wolff's Law can empower us to take control of our bone health. The principle describes that bones are stimulated to thicken when mechanical resistance is placed across the bone: i.e., when a muscle contracts. Specialized athletes such as baseball pitchers and tennis players have measurable differences in the bone density in their arms. Bones in their throwing or racket arm are thicker than the lesser used arm.
Conversely, a limb that has been broken and put in a cast will show measurable bone loss. Studies on astronauts, the bedridden and athletes have clearly shown that if the muscles around the bone are not subjected to movement, and/or the bone not subjected to the weight of the body or an external force, they will lose calcium.
Exercise places physical stress on the body. Bones, like muscles, respond to stress by becoming bigger and stronger, and like muscles, bones weaken and literally shrink if not used.
Of utmost importance to individuals who choose to exercise or who haven't yet started is that it's never too late to positively impact bone health. When the astronauts returned from a weightless environment and started exercising again, the bone mass returned to pre-flight levels. When the cast is removed, the limb will also regain its bone mass if exercised. This gain in bone mass is not limited to the young. Studies on the elderly have clearly shown that bone loss can be retarded, even reversed with exercise.
One of the best types of exercise for bone health is resistance training. Many women believe that strength training will cause them to bulk up. On the contrary, when performed properly, building muscle not only improves bone strength but also converts fat cells into muscle cells. This in turn increases the body's metabolic rate, which causes calories to burn at a much faster rate! Weight bearing exercises such as walking and running also prove to be effective in maintaining and increasing bone strength.
Ensuring proper posture throughout our exercise and the way we work, play, sit and move can determine the chronic stress placed on our spine. Viewed from the side, the spine is shaped like an S-curve. It is ten times stronger when these natural curves are maintained. Good posture and body mechanics can alleviate/prevent back pain and protect your spine against fracture. Good posture maximizes respiratory capacity, which means we breathe more deeply. This, in turn, lessens fatigue. When the bond between us and the earth's pull is as nature intended it to be, we can reap these benefits and feel great!
Recognizing the body imbalance is as easy as standing in front of a mirror. Simply close your eyes and turn your head from side to side and then return to your centre. Upon opening your eyes, does your head tilt off to one side? Is one shoulder or hip higher or lower than the other? Does one pant leg appear shorter? Observe the tension in your neck and shoulders to determine if your muscles are working harder than they should to hold you up against gravity. If you've answered yes to any of these questions, you may be suffering from body imbalance.
In closing, realizing the significant impact we have on our bone health, we should be mindful of the following recommendations:
1. Adequate calcium and vitamin D intake is crucial to develop and maintain optimal bone health and to preserve bone mass throughout life. Supplementation with these 2 nutrients may be necessary in persons not achieving recommended dietary intake.
2. Resistance training and weight bearing exercises are the best options for individuals seeking to improve bone health.
3. The importance of a balanced posture in helping achieve optimal bone health can not be underestimated. Since gravity is a constant force acting upon us, we might as well be in line with it. Having your body balance checked early in life may catch small problems before they become big ones.
Dr. Jason Plotsky