Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health

Janus—the Roman goddess of natural cycles, change and transitions—is an appropriate symbol for the life-changing shift from the reproductive period to the post-menopausal stage of life. Since the average age of menopause is 50 years,1 it is a universal life stage for long-living Singaporean women....

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Main Authors: Eu-Leong Yong, Beverly Wen Xin Wong, Darren Yuen Zhang Tan
Format: Article
Language:English
Published: Academy of Medicine Singapore 2025-02-01
Series:Annals, Academy of Medicine, Singapore
Online Access:https://annals.edu.sg/beyond-bmi-the-janus-like-effect-of-muscle-versus-fat-on-midlife-womens-health/
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author Eu-Leong Yong
Beverly Wen Xin Wong
Darren Yuen Zhang Tan
author_facet Eu-Leong Yong
Beverly Wen Xin Wong
Darren Yuen Zhang Tan
author_sort Eu-Leong Yong
collection DOAJ
description Janus—the Roman goddess of natural cycles, change and transitions—is an appropriate symbol for the life-changing shift from the reproductive period to the post-menopausal stage of life. Since the average age of menopause is 50 years,1 it is a universal life stage for long-living Singaporean women. The menopausal transition is associated with a profound decline in circulating oestrogen levels, resulting in the slowing of basal metabolism and marked changes in body composition.2 On average, women gain approximately 2 to 3 kg during the menopause transition. Remarkably, many Singaporean women maintain relatively stable “healthy” BMI, even though deleterious changes in their body composition are occurring.2 These changes in body composition involve 2 variables, both of which increase BMI. However, 1 variable has positive, while the other has negative health effects. Muscle mass/strength—a positive factor that increases BMI—is necessary for cardiometabolic and skeletal health, activities of daily living and mobility.3 Lack of muscle mass, or sarcopenia, results in frailty and increased risk of death.3 On the other hand, abdominal (visceral) adiposity also increases BMI but is a strong negative factor for cardiometabolic health.2
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spelling doaj-art-0ad1db8a7e2d4c638debdc208f3416712025-08-20T02:55:28ZengAcademy of Medicine SingaporeAnnals, Academy of Medicine, Singapore2972-40662025-02-0154212512810.47102//annals-acadmedsg.2024278Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s healthEu-Leong YongBeverly Wen Xin WongDarren Yuen Zhang Tan Janus—the Roman goddess of natural cycles, change and transitions—is an appropriate symbol for the life-changing shift from the reproductive period to the post-menopausal stage of life. Since the average age of menopause is 50 years,1 it is a universal life stage for long-living Singaporean women. The menopausal transition is associated with a profound decline in circulating oestrogen levels, resulting in the slowing of basal metabolism and marked changes in body composition.2 On average, women gain approximately 2 to 3 kg during the menopause transition. Remarkably, many Singaporean women maintain relatively stable “healthy” BMI, even though deleterious changes in their body composition are occurring.2 These changes in body composition involve 2 variables, both of which increase BMI. However, 1 variable has positive, while the other has negative health effects. Muscle mass/strength—a positive factor that increases BMI—is necessary for cardiometabolic and skeletal health, activities of daily living and mobility.3 Lack of muscle mass, or sarcopenia, results in frailty and increased risk of death.3 On the other hand, abdominal (visceral) adiposity also increases BMI but is a strong negative factor for cardiometabolic health.2https://annals.edu.sg/beyond-bmi-the-janus-like-effect-of-muscle-versus-fat-on-midlife-womens-health/
spellingShingle Eu-Leong Yong
Beverly Wen Xin Wong
Darren Yuen Zhang Tan
Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
Annals, Academy of Medicine, Singapore
title Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
title_full Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
title_fullStr Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
title_full_unstemmed Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
title_short Beyond BMI: The Janus-like effect of muscle versus fat on midlife women’s health
title_sort beyond bmi the janus like effect of muscle versus fat on midlife women s health
url https://annals.edu.sg/beyond-bmi-the-janus-like-effect-of-muscle-versus-fat-on-midlife-womens-health/
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