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Skeletal muscles are composed of a bundle of muscle fibers and are attached to bones through tendons. Each skeletal muscle fiber is a single muscle cell. The sarcolemma, the plasma membrane of a skeletal muscle cell, consists of a lipid bilayer and glycocalyx that supports muscle fibers. The sarcolemma extends into the muscle cells to form tubular structures called transverse or T-tubules. Each side of the T-tubules consists of a membrane-bound structure called the sarcoplasmic reticulum,...
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Relationship between Within-Visit Blood Pressure Variability and Skeletal Muscle Mass.

K-I Kim1, M-G Kang, S-J Yoon

  • 1Kwang-il, Kim, MD, PhD, Professor, Department of Internal Medicine, Seoul National University College of Medicine, Seoul National University Bundang Hospital, 82 Gumi-ro, 173 Beon-gil, Bundang-gu, Seongnam-si, Kyeongi-do, 13620, Republic of Korea. E-mail: kikim907@snu.ac.kr; Telephone: +82-31-787-7032; Fax: +82-31-787-4052.

The Journal of Nutrition, Health & Aging
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Increased blood pressure variability is linked to lower skeletal muscle mass in aging adults. This finding suggests hemodynamic factors may contribute to sarcopenia development.

Keywords:
Blood pressure variabilitycohortskeletal muscle mass

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Area of Science:

  • Gerontology
  • Cardiovascular Health
  • Musculoskeletal Health

Background:

  • Sarcopenia, the age-related decline in muscle mass and function, poses a significant public health challenge.
  • Understanding factors influencing sarcopenia is crucial for developing effective interventions in an aging population.

Purpose of the Study:

  • To investigate the association between blood pressure variability and skeletal muscle mass.
  • To analyze this relationship within a large, nation-wide population cohort.

Main Methods:

  • Cross-sectional study using data from the Korea National Health and Nutrition Examination Survey (KNHANES) (2009-2011).
  • Included 14,481 participants (age ≥ 20 years) with blood pressure and dual energy X-ray absorptiometry (DXA) data.
  • Calculated blood pressure variability indices (SD, CV, MMD) and appendicular skeletal muscle mass (ASM) adjusted for BMI.

Main Results:

  • A significant inverse relationship was found between blood pressure variability indices and adjusted ASM.
  • Participants in the lowest ASM quintile exhibited significantly higher blood pressure variability.
  • This association remained significant even after adjusting for confounding factors in multivariate analysis.

Conclusions:

  • Elevated blood pressure variability is associated with reduced skeletal muscle mass.
  • Hemodynamic influences may play a critical role in the pathogenesis of sarcopenia.
  • These findings highlight a potential link between cardiovascular health and muscle aging.