BF	Body fat
BM	Body mass
BMI	Body mass index
BMM	Bone mineral mass
CCP	Combined contraceptive pill
CFT	Combat fitness test
CK	Creatine kinase
CMJ	Countermovement jump
CMJREL	CMJ relative to body mass
COCP	Combined oral contraceptive
CRH	Corticotropin-releasing hormone
CRP	C-reactive protein
CTT-2	Color trails test
CTx	C-telopeptide cross-links of type I collagen
DBP	Diastolic blood pressure
DHEA	Dihydroepiandrostenedione
DHEA-S	Dihydroepiandrostenedione sulfate
DLM	Dry lean mass
DLW	Doubly labeled water
DXA	Dual energy X-ray absorptiometry
EEREL	Energy expenditure relative to body mass
EMS	Emergency medical services
F	Female
FAI	Free androgen index
FFA	Free fatty acids
FFM	Fat-free mass
FM	Fat mass
FSH	Follicle-stimulating hormone
GnRH	Gonadotropin-releasing hormone
GSH	Glutathione
GPX	Glutathione peroxidase
HCC	Hair cortisol concentration
HDL	High-density lipoprotein
HOMA2 IR	Homeostatic modeling assessment of insulin resistance 2
HPA	Hypothalamic–pituitary–adrenal
HPG	Hypothalamic–pituitary–gonadal
HPO	Hypothalamic–pituitary–ovarian
HR	Heart rate
HRV	Heart rate variability
IFN-γ	Interferon γ
IGF-1	Insulin-like growth factor
LEA	Low energy availability
PRISMA-ScR	Preferred Reporting Items for Systematic Review and Meta-Analyses extension for Scoping Reviews
REDs	Relative Energy Deficiency in Sport
SD	Standard deviation
SNS	Sympathetic nervous system
U.S.	United States