Researchers ran a study with 141 people aged 65 and older from the greater Boston area. The volunteers took capsules with whey protein or placebo for 24 weeks. Whey comes from milk and has the amino acid leucine.
Strength tests included leg presses and a balance test. The main result was that extra protein did not change strength after 24 weeks, and results were the same for women and men. Researchers also gave potassium bicarbonate to some people to test body acid, but this did not change the result.
Scientists say exercise, especially resistance training, is the most reliable way to improve strength for older adults.
Difficult words
- whey protein — A substance from milk with amino acids
- placebo — A pill that has no active medicine
- leucine — A simple amino acid in many proteins
- capsule — A small container with medicine to swallowcapsules
- resistance training — Exercise with weights to make muscles stronger
- reliable — Can be trusted to give the same result
Tip: hover, focus or tap highlighted words in the article to see quick definitions while you read or listen.
Discussion questions
- Would you try resistance training as you get older? Why or why not?
- Have you ever taken a vitamin or supplement? Did it change anything?
- What exercise do you think helps balance and leg strength?
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