30 s STS	30-Second Sit-to-Stand Test
5 × STS	Five Times Sit-to-Stand Test
AAS	Anabolic Androgenic Steroids
ACT	α1-Antichymotrypsin
ATP	Adenosine Triphosphate
BIA	Bioelectrical Impedance Analysis
BMI	Body Mass Index
Ca2+	Calcium Ion
CPT-1	Carnitine Palmitoyltransferase 1
CRP	C-Reactive Protein
CSA	Cross-Sectional Area
DEXA	Dual-Energy X-ray Absorptiometry
DHPR	Dihydropyridine Receptor
ECM	Extracellular Matrix
ERα	Estrogen Receptor Alpha
ERβ	Estrogen Receptor Beta
FFA	Free Fatty Acids
FFM	Fat-Free Mass
FSR	Fractional Synthesis Rate
GIP	Glucose-Dependent Insulinotropic Polypeptide
GLP-1	Glucagon-Like Peptide-1
HDL	High-Density Lipoprotein
HFpEF	Heart Failure with Preserved Ejection Fraction
HIV	Human Immunodeficiency Virus
IL-15	Interleukin-15
IL-6	Interleukin-6
IMF	Intermuscular Fat
LDL	Low-Density Lipoprotein
MRI	Magnetic Resonance Imaging
NRS	Numeric Rating Scale
ROS	Reactive Oxygen Species
RQ	Respiratory Quotient
RyR1	Ryanodine Receptor Type 1
SAT	Subcutaneous Adipose Tissue
SIF	Italian Society of Phlebology
SISMES	Italian Society of Motor and Sports Sciences
SMAD2/3	Mothers Against Decapentaplegic Homolog 2/3 (intracellular signaling proteins)
SMM	Skeletal Muscle Mass
SPARC	Secreted Protein Acidic and Rich in Cysteine
STS	Sit-to-Stand Test
TNF-α	Tumor Necrosis Factor Alpha
TUG	Timed Up and Go Test
VAS	Visual Analog Scale