Vagal Flexibility during Exercise: Impact of Training, Stress, Anthropometric Measures, and Gender

Table 2

Results of the regression analysis for the relationship between anthropometric, physical training, and stress variables, and the HRV indices that assess reactivity and recovery.

	Variable	Model 1: physical training			Model 2: stress			Model 3: anthropometry
Reactivity	RMSSD exe-rest	Recovery HR	0.3968	0.1159		-122.0918	0.4413		1.9409	0.1904
						6.4640			-199.0476
					Perceived stress	1.2391
						12.4345
						-12.1427
	SD1 exe-rest					-81.0581	0.4158		1.0737	0.1300
						4.3806			-110.2779
					Perceived stress	0.8069
						6.13
						-8.4507
Recovery
	RMSSD rec-exe	Recovery HR	-0.6498	0.4154		72.2213	0.2461		-1.7238	0.0839
						-4.4386			181.2200
						6.5614
					Demand	3.1534
						-3.9841
	SD1 rec-exe	Recovery HR	-0.3757	0.3811		99.8430	0.3359		-0.1622	0.2851
						-2.8425		WHR	76.8599
						-5.8383		Fat percentage	-1.2513
						4.4578
					Demand	2.0380
						-2.3898

WHR: waist-hip ratio; % fat: fat percentage; HR: heart rate; RMSSD: root mean square of the successive differences between RR intervals; SD1: standard deviation 1; SD2: standard deviation 2; exe-rest: exercise minus rest (reactivity); rec-exe: recovery minus exercise (recovery); : interactions with gender.