Abbreviation	Meaning
BMI	Body Mass Index
CI	Confidence Interval
EWGSOP2	European Working Group on Sarcopenia in Older People 2
GLIS	Global Leadership Initiative on Sarcopenia
HMB	β-Hydroxy-β-Methylbutyrate
HMB-Ca	Calcium β-Hydroxy-β-Methylbutyrate
HMB-FA	Free Acid β-Hydroxy-β-Methylbutyrate
IGF-1	Insulin-Like Growth Factor 1
MQ	Muscle Quality
PEDro	Physiotherapy Evidence Database
PICOS	Population, Intervention, Comparison, Outcomes, and Study Design
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROSPERO	International Prospective Register of Systematic Reviews
RCT	Randomized Controlled Trial
RoB 2	Cochrane Risk of Bias 2 Tool
RT	Resistance Training
SD	Standard Deviation
SE	Standard Error
SMD	Standardized Mean Difference
SPPB	Short Physical Performance Battery
WOS	Web of Science