Like strength, power is a use it or lose it ability that can disappear quickly. While strength declines around 1 to 3 percent annually after the age of 55 if you're not strength training, power disappears at a rate almost double that.
Dustin Jones, a Kentucky-based doctor of physical therapy, said that when you lose power, single tasks often feel draining. If you struggle to run up a flight of stairs or are unable to quickly step up onto a curb at a busy intersection, that's a lack of power.
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