Thursday, August 21, 2008

Jumping - Daily Functioning of the Knee

Jumping
It’s hard not to feel a twinge of envy when you watch your favorite six-year-old leap off the furniture, knowing the only damage she’s likely to cause is to Mom’s favorite breakable. As we get older, the impact of jumping is likely to have far more painful consequences than paying for repairs out of our allowance money. The harsh impact combined with the potential for twisting and tearing, makes jumping a risky business indeed. Still, some of us can’t resist. We rise into the air on driveway basketball courts and in funk-music-driven aerobics classes. Sometimes we land easily, sometimes we don’t.

When you jump, even a good landing may compromise your knee joint. Those strong quadriceps muscles contract on landing and pull hard at the patellar tendon’s insertion on the tibial tuberosity (the little bump at the top of the tibia). This may cause jumper’s knee (inflammation of the patellar tendon). Of course, if you land off your intended, balanced course, you will strain all elements of your knee joint. The correct shoes and corrective knee bands can reduce knee injury when jumping.

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