ACSM	American College of Sports Medicine
AIC	Akaike information criterion
BIC	Bayesian information criterion
BMI	Body mass index
CI	Confidence interval
CLIA	Chemiluminescent immunoassay
CON	Control group
E1	Estrone
E2	Estradiol
ELISA	Enzyme-linked immunosorbent assay
EXP	Experimental group
Free E2	Free estradiol
GC–MS	Gas chromatography–mass spectrometry
GRADE	Grading of Recommendations Assessment, Development, and Evaluation
HRmax	Maximum heart rate
HRR	Heart rate reserve
IEMA	Immunoenzymometric assay
I2	I-squared statistic
MD	Mean difference
NR	Not reported
PICO	Population, Intervention, Comparator, and Outcome
PICOS	Population, Intervention, Comparator, Outcome, and Study Design
PI	Prediction interval
PCOS	Polycystic ovary syndrome
PRISMA	Preferred Reporting Items for Systematic Reviews and Meta-Analyses
PROSPERO	International Prospective Register of Systematic Reviews
RCT	Randomized controlled trial
REML	Restricted maximum likelihood
RIA	Radioimmunoassay
RoB 2	Risk of Bias 2
SD	Standard deviation
SE	Standard error
SHBG	Sex-hormone-binding globulin
SMD	Standardized mean difference
TFM	Total fat mass
UHPLC–MS/MS	Ultra-high-performance liquid chromatography–tandem mass spectrometry
UPLC–MS/MS	Ultra-performance liquid chromatography–tandem mass spectrometry
VO2max	Maximal oxygen uptake
WC	Waist circumference