Table 5.

Spontaneous cardiovagal baroreflex sensitivity and heart rate variability pre-drink consumption values

	Spontaneous Breathing					Paced Breathing
	Water	Diet	Sucrose	HFCS	P Value	Water	Diet	Sucrose	HFCS	P Value
Heart rate, beats/min	56 ± 7	58 ± 8	58 ± 7	59 ± 9	0.26	59 ± 9	60 ± 8	58 ± 8	62 ± 11	0.22
R-R interval ms	1,092 ± 153	1,059 ± 147	1,063 ± 143	1,047 ± 155	0.34	1,043 ± 160	1,026 ± 142	1,055 ± 162	1,001 ± 170	0.26
Spontaneous baroreflex sensitivity
Up, ms/mmHg	27 ± 10	28 ± 13	27 ± 10	26 ± 10	0.60	25 ± 12	23 ± 9	20 ± 7	22 ± 11	0.04
Down, ms/mmHg	24 ± 8	22 ± 7	24 ± 8	24 ± 11	0.54	23 ± 10	21 ± 9	22 ± 9	20 ± 9	0.32
Overall, ms/mmHg	25 ± 9	25 ± 10	25 ± 9	25 ± 10	0.96	24 ± 10	22 ± 9	21 ± 8	21 ± 10	0.17
Heart rate variability
SDNN, ms	82 ± 31	82 ± 31	81 ± 30	79 ± 35	0.90	80 ± 34	80 ± 30	77 ± 28	79 ± 35	0.95
RMSSD, ms	83 ± 43	79 ± 41	76 ± 40	79 ± 44	0.42	82 ± 49	81 ± 47	73 ± 33	75 ± 50	0.12
HF, ms2	1,803 ± 1,375	1,468 ± 1,408	1,579 ± 1,399	1,488 ± 1,275	0.49	2,202 ± 2,394	2,030 ± 2,005	1,181 ± 866	1,846 ± 2,024	0.14
LF, ms2	2,170 ± 2,010	2,044 ± 1,525	1,984 ± 1,682	2,297 ± 1,697	0.68	1,476 ± 1,145	1,369 ± 989	1,421 ± 1,364	1,657 ± 1,974	0.67

Data are presented as absolute values and means ± SD; n = 12 (10 M, 2 F). Comparisons between conditions within Spontaneous Breathing or Paced Breathing were made using separate one-way ANOVA. P value columns are main effect of drink. HF, high frequency; HFCS, high-fructose corn syrup; LF, low frequency; RMSSD, square root of the mean squared differences between consecutive R-R intervals; SDNN, standard deviation of R-R intervals.