TABLE 1.

Sample characteristics, menstrual cycle, and circadian rhythm measurement.

First author, year	Participants characteristics						Menstrual cycle		Circadian rhythm
	N	Population	Age (y)	Body weight (kg)	Height (m)	Training/week (h)	Methods	Phase	Chronotype	Methods	Time of day (h)
Tounsi (2018)	11	high-level soccer players	21.18 ± 3.15	59.02 ± 7.59	1.63 ± 0.05	N/A	Serum progesterone levels	early follicular	N/A	N/A	7:30
								late follicular
								luteal phase			17:30
Bambaeichi (2004)	8	sedentary females	30 ± 5	66.26 ± 4.6	1.63 ± 0.06	N/A	BBT and a home ovulation kit	menstruation	intermediate (n = 6)	Chronotype was assessed from the questionnaire. Rectal temperature was used as a marker of the circadian phases	6:00
								mid-follicular
								ovulation	moderately morning type (n = 1)
								mid-luteal			18:00
								late luteal	moderately evening type (n = 1)
Birch (2002)	10	moderate physically active females	24 ± 3	58.4 ± 6.9	N/A	30 min/day for 5 days or more per week	BBT and moliminal symptom analysis	mid-follicular	N/A	The oral temperature was used as a marker of the circadian phases	6:00
								mid-luteal phase			18:00
Giacomoni (1999)	11	physical education students	22.6 ± 2.7	59.7 ± 5.4	1.661 ± 0.085	N/A	Serum progesterone levels	mid-follicular	N/A	Rectal temperature was used as a marker of the circadian phases	9:00
								mid-luteal			14:00
											18:00