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

Table 5

Correlation calculated on pooled data for both adapted and maladapted athletes.

	1	2	3	4	5	6	7	8	9	10	11	12
(1) Performance	—	—	—	—	—	—	—	—	—	—	—	—
(2) Internal TL	−0.27	—	—	—	—	—	—	—	—	—	—	—
(3) Training volume	−0.79	0.14	—	—	—	—	—	—	—	—	—	—
(4) Fatigue	−0.69	0.57	0.69	—	—	—	—	—	—	—	—	—
(5) Tension	−0.16	0.47	0.21	0.62	—	—	—	—	—	—	—	—
(6) Depression	−0.35	0.45	0.34	0.72	0.80	—	—	—	—	—	—	—
(7) Absolute sIgA	0.55^∗	−0.01	−0.50	−0.45	−0.22	0.35	—	—	—	—	—	—
(8) TMD	−0.44	0.61	0.44	0.84	0.85	0.91	−0.33	—	—	—	—	—
(9) TST	0.60	−0.25	−0.70	−0.83	−0.51^∗	−0.56	0.53	−0.69	—	—	—	—
(10) SE%	0.91	−0.29	−0.76	−0.76	−0.22	−0.46	0.58	−0.50	−0.62	—	—	—
(11) SOL	−0.48	0.35	0.23	0.42	0.20	0.13	0.22	0.35	−0.52	−0.43	—	—
(12) WASO	−0.66	0.03	0.56^∗	0.17	−0.07	−0.19	−0.29	0.08	−0.19	−0.55	0.29	—

; . TL: training load; sIgA: secretory immunoglobulin A; TMD: total mood disturbance; TST: total sleep time; SE%: sleep efficiency; SOL: sleep onset latency; WASO: wake after sleep onset.