I’ve written to you many times about how endurance running is bad for your heart and lungs.
Today I want to tell you about how it affects your muscles.
Skeletal muscles are the ones you can see, and the ones you exercise when you move. They attach to your bones via tendons and power up your whole body.
Strong skeletal muscles fill you with strength and potential. They give you the feeling of confidence and they ensure you stay mobile and independent.
And the strength of your leg muscles plays a lead role in how long you’ll live.
A study from the University of Pittsburgh followed nearly 2,300 people for five years. It found that low muscle strength in your quadriceps made you 51 percent more likely to die.1