Why 1950s Kids Were So Much Stronger (Without Even Trying)

American Hearth
リアクション
2026年07月18日
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In 1953, a doctor named Hans Kraus walked into a school gymnasium in New York City with a stopwatch, a clipboard, and six simple exercises. He asked children to do things like touch their toes, hold a sit-up, and lift their legs while lying flat on the floor. Nothing complicated. Nothing athletic. These were the bare minimum movements a healthy body should be able to perform without strain.