Obesity. The relationship among obesity, joint
pain, functional impairment, and physical activity
levels is complex. Obesity, which now affects 33.8%
of adults ages 20 years and older in the United States,
is a significant risk factor for the development and
progression of OA, especially in the knee but also in
other joints.12 The increased load that obesity places
on joints can exacerbate the pain and functional limitations
of OA.4, 13 Because of the physics of knee movement,
activity magnifies the load across the knee from
upper-body weight by three to seven times. Therefore,
weight loss in obese patients, especially if accompanied
by increased physical activity, can improve physical
function and quality of life
Obesity. The relationship among obesity, joint
pain, functional impairment, and physical activity
levels is complex. Obesity, which now affects 33.8%
of adults ages 20 years and older in the United States,
is a significant risk factor for the development and
progression of OA, especially in the knee but also in
other joints.12 The increased load that obesity places
on joints can exacerbate the pain and functional limitations
of OA.4, 13 Because of the physics of knee movement,
activity magnifies the load across the knee from
upper-body weight by three to seven times. Therefore,
weight loss in obese patients, especially if accompanied
by increased physical activity, can improve physical
function and quality of life
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