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Better heart function
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Lower inflammation
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Stronger respiratory capacity
Studies show that walking speed alone can predict lifespan with surprising accuracy.
2. Stand Up From a Chair Without Using Hands
This movement assesses leg strength, balance, and neurological coordination.
If a 69-year-old can rise from a chair effortlessly:
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Their risk of falls is lower
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Their muscle mass is better preserved
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Their metabolic health is more stable
This ability is one of the most powerful indicators of “biological age.”