Relationship between 10 repetition maximum for chest press, leg press, and muscle mass measured using bioelectrical impedance analysis in healthy young adults.
Hotaka Sugimoto, Masahito Taga, Kio Fukushima and 2 others
PMID 39902303WHAT IT FOUND
Muscle mass measured by bioelectrical impedance was closely related to chest and leg press strength in healthy young adults who had not trained recently.
This may help estimate training loads.
Key findings
01BIA muscle mass measurements were significantly correlated with 10RM for chest press and leg press in all participants.
02For all participants, chest press 10RM had an R2 of 0.80 using ULMM, and leg press 10RM had an R2 of 0.55 using LLMM.
03The models were built only in healthy adults aged 18 to 29 who had not regularly performed resistance training in the past year, and the authors state they may not directly apply to older or trained individuals.
STILL TO COME
How it was doneWhat they foundWhat it means for PTs
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What it does not show
The analysis used 93 participants after one dropout, and the sample was healthy adults aged 18 to 29 who had not regularly performed resistance training in the past year. The study reports correlations and regression fits, not a test that BIA-based load estimates reduce variability in repetitions performed. The equations are device-specific and machine-specific, because absolute skeletal muscle mass values vary across BIA devices and force values vary across machines. Sex-specific correlations and models were inconsistent with some previous studies and need further investigation.
Declared interests
The authors declared no conflicts of interest.
The easy way to misread this
Do not use the regression equations to prescribe resistance training loads for older adults, trained individuals, or different machines. The models were built only in healthy adults aged 18 to 29 who had not regularly performed resistance training in the past year, and the authors state they may not directly apply to older or trained individuals or to other machines.