Evidence That Sleep Is an Indicator of Overtraining during the Competition Phase of Adolescent Sprinters

Table 4

Mean ± SD of sleep actigraphy data during the competitive phase in two groups of athletes considered as adapted and maladapted to training.

Variables	All (N = 20)	MG (n = 7)	AG (n = 13)	value	d
Bedtime (hh:mm)	10 : 52 ± 0 : 55	11 : 13 ± 1 : 00	10 : 41 ± 0 : 52	0.226	0.4
Get-up time (hh:mm)	6 : 45 ± 1 : 06	7 : 17 ± 1 : 19	6 : 28 ± 0 : 54	0.119	0.7
TIB (min)	473.7 ± 37.4	484.6 ± 36.4	467.8 ± 38.0	0.349	0.5
TST (min)	414.5 ± 32.1	394.3 ± 20.4	425.3 ± 32.6	0.036	1.1
SE%	87.7 ± 5.5	81.5 ± 2.9	91.0 ± 3.4	<0.001	3.0
SOL (min)	9.9 ± 7.0	14.8 ± 7.5	7.3 ± 5.3	0.018	1.2
WASO (min)	38.8 ± 15.9	49.4 ± 16.8	33.1 ± 12.7	0.025	1.1
No. of awakenings	23.6 ± 27.0	33.0 ± 32.6	18.5 ± 23.3	0.263	0.5

MG: maladapted group; AG: adapted group; d: Cohen’ d effect size; TIB: time in bed; TST: total sleep time; SE%: sleep efficiency; SOL: sleep onset latency; WASO: wake after sleep onset.