TABLE 2.

Weekly training volume (including rest periods) for each intensity level and group.

Intensity Level	PN			GG			GN			NG

	GG	GN	NG	PN	GN	NG	PN	GG	NG	PN	GG	GN
Z1	^*	^*	^**	^*	-	-	^*	-	-	^**	-	-
(km· wk⁻¹)	13543 (7529)			15785 (9477)			15725 (7624)			16201 (8407)
Z2	-	-	-	-	-	-	-	-	-	-	-	-
(km· wk⁻¹)	17488 (13120)			19018 (16447)			17262 (11857)			17847 (13748)
Z3	^**	-	^**	^**	^**	-	-	^**	-	^**	-	-
(km· wk⁻¹)	3065 (2507)			2249 (2130)			2033 (2061)			2474 (2132)
Z4	-	-	-	-	-	-	-	-	-	-	-	-
(km· wk⁻¹)	663 (541)			572 (652)			586 (492)			623 (510)
Z5	^**	-	^*	^**	^**	^*	-	^**	-	^*	^*	-
(km· wk⁻¹)	613 (460)			443 (408)			667 (383)			535 (451)
Z6	-	^**	^*	-	^**	^*	^**	^**	^**	^*	^*	^**
(min· wk⁻¹)	4.8 (14.2)			3.5 (13.2)			1.4 (12)			3.9 (14.6)
Z7	^**	^**	-	^**	^**	^**	^**	^**	^**	-	^**	^**
(min· wk⁻¹)	6.4 (15.4)			2.13 (7.5)			0 (0)			5.9 (17.5)

Values are mean (SD).

Significant difference of the 1st line group from the 2nd line group, for each intensity level (P ≤ 0.05).

^**

Significantly different (P ≤ 0.01).

-Not significantly different.