Bridging assessment, biomarkers, and interventions: progress in muscle health research.
Dustin J Oranchuk, Jason M DeFreitas, André R Nelson and 1 others
Exercise remains the main intervention for muscle health, with multimodal programs (resistance, aerobic, balance) preferred for functional outcomes.
Biomarkers alone did not predict muscle recovery, and standardized assessment protocols are still lacking.
Key findings
1Semi-automated ultrasound analysis produced stronger intra- and inter-rater reliability for fascicle length, pennation angle, and muscle thickness than manual measurement, particularly among novice raters, suggesting automation may reduce dependence on analyst expertise.
2Short- and long-chain acylcarnitine profiles measured at ICU discharge were not independently associated with muscle outcomes at three months, and models incorporating these metabolites failed to predict subsequent muscle health.
3For primary sarcopenia, multimodal exercise programs integrating resistance, aerobic, and balance training are recommended over single-modality approaches when the goal extends beyond isolated muscle mass and strength to broader functional outcomes.
Still to come
How it was doneWhat they foundWhat it means for PTs
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What it does not show
This is a narrative perspective, not a systematic review. There is no stated search strategy, no inclusion or exclusion criteria, and no quality appraisal of the nine included papers. Most of the included studies are cross-sectional or observational, so the associations reported (muscle quality and incontinence, creatinine ratio and prediabetes, grip strength and cardiovascular risk) cannot be read as causal. The review itself does not report any original data. All findings are secondhand summaries of the nine papers. The authors note that there is no formal definition of muscle health, substantial heterogeneity in how it is measured across studies, and a lack of standardized diagnostic thresholds. The exercise recommendations are drawn from expert opinion papers and prior evidence, not from new randomized trials within this collection.
Declared interests
Funded by the VA BLRD and CSRD Collaborative Merit Review Award (Grant Number I01 CX002836). The authors state that opinions expressed are their own and do not necessarily reflect the view of the U.S. Department of Veterans Affairs. No industry funding or commercial conflicts are declared.
The easy way to misread this
Do not read this as evidence that any specific exercise program or ultrasound protocol works. The review synthesizes mostly cross-sectional and observational studies, and the exercise recommendations rest on expert opinion and prior evidence rather than on new randomized trials from this collection. The biomarker findings are mixed: one set of metabolites failed to predict outcomes, while two pragmatic indices showed associations that cannot be read as causal.
Summarised by AI from the full paper, without a clinician reviewing it. Check it against the source before it changes what you do. Read it on PubMed →