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Knee Degeneration Rates Double, Harvard Study Finds Lifestyle, Not Age or Weight, is Main Cause

From Liberty Times · () Chinese

Translated from Chinese, summarized and contextualized by DistantNews.

At a glance

News Named sources Context piece
  • A Harvard study found modern people's knee degeneration rates are double those of prehistoric times and nearly triple those of the industrial era.
  • Researchers identified modern sedentary lifestyles, not aging or obesity, as the primary cause of increased knee degeneration.
  • The study emphasizes that knee cartilage thrives on appropriate, regular load, similar to muscle, rather than being a consumable material.

Modern lifestyles have dramatically increased knee degeneration, doubling rates seen in prehistoric populations and nearly tripling those from the industrial era, according to a Harvard study. Contrary to common belief, aging and obesity are not the main culprits.

Modern people's knee degeneration rates have doubled compared to the past.

— Wang Si-hengA physician at Hengxin Rehabilitation Clinic, explaining the findings of the Harvard study.

Researchers analyzed knee joints from individuals over 50 across three eras: prehistoric hunter-gatherers and early farmers, early industrial period (1800s-early 1900s), and late modern period (late 1900s-early 2000s). They found degeneration rates of 8% in prehistoric times, 6% in the early industrial era, and a striking 16% in modern times.

Even after accounting for age and weight, the modern degeneration rate remained 2.1 times higher. This points to a sedentary lifestyle as the primary driver. The study highlights that knee cartilage is a living tissue that requires use to stay healthy. It nourishes itself through joint fluid, and the signal to remain healthy comes from being used.

The main culprits for the surge in knee degeneration are not aging or obesity, but rather people's lifestyles shifting from 'moving all day' to 'sitting all day'.

— Wang Si-hengExplaining the primary cause of increased knee degeneration identified by the Harvard study.

However, the relationship between cartilage and activity is a bell curve. Too little use leads to atrophy, while excessive or overly intense activity can cause wear and tear. Therefore, the best approach for knee health is moderate and regular loading, not complete inactivity or extreme exertion.

Cartilage is not a consumable material; it's more like muscle. Giving it appropriate, regular load is the best way to maintain knee health.

— Wang Si-hengDescribing the nature of knee cartilage and its care.
DistantNews Editorial

Originally published by Liberty Times in Chinese. Translated, summarized, and contextualized by our editorial team with added local perspective. Read our editorial standards.

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