Applicability of Dmax Method on Heart Rate Variability to Estimate the Lactate Thresholds in Male Runners

Table 2

Pearson correlation expressed as absolute and relative values for speed, blood lactate, RR interval, and heart rate during maximal running test among well-trained runners.

	Speed				Lactate				RR				HR
	I	II	III	IV	I	II	III	IV	I	II	III	IV	I	II	III	IV
HRVTDMAX1 (I)	1	0.44	0.46	0.58	1	0.42	0.55	0.66	1	0.83	0.31	0.19	1	0.85	0.45	0.63
HRVTDMAX2 (II)	0.29	1	0.26	0.48	0.42	1	0.67	0.35	0.78	1	0.44	0.24	0.81	1	0.52	0.71
LT1 (III)	−0.18	−0.46	1	0.85	0.45	0.61	1	0.59	0.38	0.38	1	0.54	0.29	0.33	1	0.81
LT2 (IV)	−0.06	−0.27	0.41	1	0.29	−0.00	−0.08	1	0.36	0.28	0.66	1	0.57	0.55	0.54	1

HRVT_DMAX1 = I; HRVT_DMAX2 = II; LT₁ = III, and LT₂ = IV. Upper and lower triangles of each variable (speed, lactate, RR, and HR) refer to absolute and relative values, respectively. . .