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Middle-Aged Weight Gain Not Due to Slow Metabolism, Taiwanese Study Finds

From Liberty Times · () Chinese

Translated from Chinese, summarized and contextualized by DistantNews.

At a glance

News Named sources Context piece
  • Middle-aged weight gain is often attributed to slowed metabolism, but research suggests metabolic rates remain stable between ages 20 and 60.
  • Key factors contributing to middle-aged weight gain include reduced daily activity, muscle loss, and unknowingly consuming more calories.
  • To combat this, experts recommend regular resistance training, increasing daily movement, and being mindful of hidden calorie sources like beverages and snacks.

Many people notice a gradual increase in weight as they enter middle age, often assuming their metabolism has slowed down. However, a large-scale study involving over 6,400 individuals suggests this common belief may be inaccurate. Researchers found that metabolic rates remain relatively stable for most people between the ages of 20 and 60.

The average metabolic rate remains largely stable between the ages of 20 and 60.

— Dr. Wang Si-HengSummarizing the study's findings on metabolic rates.

Dr. Wang Si-Heng, a physician at Hengxin Rehabilitation Clinic in Taiwan, explained that the weight gain experienced by many in their middle years is typically not due to a declining metabolism. Instead, the study points to three primary culprits: a decrease in daily physical activity, a gradual loss of muscle mass, and a tendency to consume more calories than one realizes.

The weight gained in middle age is usually due to reduced daily activity, muscle loss, and consuming more calories without realizing it.

— Dr. Wang Si-HengIdentifying the key factors behind middle-aged weight gain.

Daily activity, which includes seemingly minor actions like walking, taking stairs, or even standing, significantly contributes to calorie expenditure. As people age, their lifestyles often shift towards more sedentary habits, such as driving to work, using elevators, and spending leisure time reclining. This reduction in non-exercise activity thermogenesis (NEAT) can lead to a caloric surplus over time.

Daily calorie expenditure is influenced by factors like muscle mass, step count, sedentary time, and exercise habits.

— Dr. Wang Si-HengExplaining the components of daily calorie consumption.

Furthermore, muscle mass naturally declines with age, especially without regular resistance training. Since muscle tissue burns more calories at rest than fat tissue, a decrease in muscle mass can slightly lower overall energy expenditure. This, combined with potentially increased consumption of high-calorie beverages, snacks, and larger meals during social occasions, can result in gradual weight gain. The study suggests that instead of a metabolic slowdown, middle-aged weight gain is more a consequence of subtle lifestyle changes and dietary habits.

Middle-aged weight gain is not a metabolic engine failure, but rather slightly less throttle and a quiet addition of fuel each day.

— Dr. Wang Si-HengUsing an analogy to explain the causes of weight gain.
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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