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Research
Study type: ObservationalConfidence: Moderate

Distribution of Skeletal Muscle Mass: Whole-Body MRI in 468 Adults

Janssen I, Heymsfield SB, Wang ZM, Ross R

Year2000
Sample sizen=468
JournalJournal of Applied Physiology
AuthorsJanssen I, Heymsfield SB, Wang ZM, Ross R

Evidence is still building up

Summary

Summary

Whole-body MRI measured skeletal muscle in 468 adults: men averaged 33.0 kg (38.4% of body mass), women 21.0 kg (30.6%). Age-related muscle loss occurs mainly in the lower body, which is the largest muscle pool by volume.

Source (read the original)

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DOI: 10.1152/jappl.2000.89.1.81

Key Findings

Key findings

  • 1

    Total skeletal muscle mass: men 33.0 kg (38.4% of body mass), women 21.0 kg (30.6%)

  • 2

    Age-related absolute muscle loss is stated to occur mainly in the lower body

  • 3

    The lower body is the dominant, largest muscle pool by volume

  • 4

    High-precision, large-scale descriptive reference data from whole-body MRI

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Resistance exercise for muscular strength in older adults: A meta-analysis

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50歳以上の成人を対象とした抵抗性運動の筋力・筋肉量に対する効果を検証したメタ分析（47研究・1,079名）。高齢者でも適切な抵抗性運動により筋力・筋肉量が有意に向上することを示した。加齢によるテストステロン低下は筋肥大の絶対的な障壁ではない。

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