There are other surrogates as well, such as these three “equivalents” of grip strength that you can do at home.

  1. Chair stands
  2. Walking speed
  3. The Weight Gain Test.

These test all correlate with skeletal muscle mass and density — and that is the real predictor of how long and how well you will live. Which is why resistance training is important as we age, and not just 20 minutes of casual walking each day.

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