Probable respiratory sarcopenia is independently associated with reduced exercise capacity in elderly smokers
In a COPD-enriched smoking cohort, probable respiratory sarcopenia (defined as respiratory muscle weakness plus low muscle mass) was identified in 12% of participants. This group showed significantly impaired physical performance, including reduced gait speed, 6-minute walking distance (6MWD), and knee extension strength, with probable respiratory sarcopenia independently associated with lower 6MWD (β = -0.24; p = 0.02) after adjusting for confounders.
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Probable respiratory sarcopenia is independently associated with reduced exercise capacity in elderly smokers The current body of evidence comprises 1 study. EvidenceHub rates the overall confidence at 34/100 (low).
The Claim
Probable respiratory sarcopenia is independently associated with reduced exercise capacity in elderly smokers
This conclusion is most relevant to: 184 elderly smokers (79% with COPD), mean age not specified but described as elderly.
What the Research Shows
The conclusion draws on 1 linked study. Highlights from the cited literature:
- ▸Prevalence and functional impact of respiratory sarcopenia in a COPD-enriched smoking cohort. (Respiratory investigation, 2026) —
How It Works
The proposed biological pathway:
- ▸Respiratory muscle weakness reduces ventilatory capacity
- ▸Low respiratory muscle mass indicates structural muscle loss
- ▸Combined deficits impair oxygen delivery and physical endurance
- ▸Result: Reduced exercise capacity (6MWD)
Who Might Benefit
Evidence fit by population:
- ▸184 elderly smokers (79% with COPD), mean age not specified but described as elderly
Recommended Dose
N/A
Limitations & Caveats
Important context when interpreting this evidence:
- ▸Cross-sectional design prevents causal inference
- ▸Single-center study with small sample size for the probable respiratory sarcopenia group (n=22)
Frequently Asked Questions
What is respiratory sarcopenia?▼
Respiratory sarcopenia is a novel concept defined as the combination of respiratory muscle weakness (low maximal inspiratory or expiratory pressure) and decreased respiratory muscle mass (low skeletal muscle index).
How common is respiratory sarcopenia in smokers?▼
In this study of elderly smokers (79% with COPD), probable respiratory sarcopenia was found in 12% of participants.
Does respiratory sarcopenia affect exercise capacity?▼
Yes, probable respiratory sarcopenia was independently associated with lower 6-minute walking distance after adjusting for age, sex, BMI, smoking history, and lung function.
What measurements define respiratory sarcopenia?▼
It requires both respiratory muscle weakness (% maximal inspiratory pressure and/or % maximal expiratory pressure <80%) and low skeletal muscle index (<7.0 kg/m² for men, <5.7 kg/m² for women).
References
- 1.Yoshioka Y, Tanabe N, Oshima Y, Hamada R, Sato S, Maetani T, Shiraishi Y, Sato A, Ikeguchi R, Hirai T. “Prevalence and functional impact of respiratory sarcopenia in a COPD-enriched smoking cohort..” Respiratory investigation, 2026. PMID: 42447588 DOI: 10.1016/j.resinv.2026.101483