III.2.4. HF (nu)
HF (nu)
120
100
40
80
60
20
0
Supine Standing Effort
a
b
*
a
b
Figure 8: Mean (#177; SD) of the HF (nu) values
recorded during the second, fourth week and before Ramadan (n =
9).
* (p <0.05) Significant difference compared to before Ramadan
(supine position);
a (p <0.05) Significant difference compared to before Ramadan
(standing position);
b (p <0.05) Significant difference compared to before Ramadan
(During effort).
· Supine position: The analysis of the variance
shows a significant effect F (2) = 9.67; (p <0.05) of Ramadan fasting on
mean HF (nu) values (Figure 8).
Post hoc analysis shows that HF values recorded before Ramadan
are significantly lower than those measured in the middle and at the end of
Ramadan p <0.05.
·
45
Standing position: The analysis of variance shows a
significant effect F (2) = 10.29 (p <0.05) of Ramadan fasting on mean HF
(nu) values (Figure 8).
Post hoc analysis shows that the HF values recorded before
Ramadan, while standing, are significantly lower than those measured in the
middle and at the end of the month of Ramadan p <0.05.
· During effort: The analysis of the variance
shows a significant effect F (2) = 12.52 (p <0.05) of Ramadan fasting on
mean values HF (nu) (Figure 8).
Post hoc analysis shows that HF values recorded prior to
Ramadan during exercise are significantly lower than those measured in the
middle and end of Ramadan (p <0.05).
III.3. Effect of Ramadan fasting on sympathovagal
balance
6
LF / HF
4
Supine Standing Effort
b
8
*
a
A R BR R1 R2
M
2
0
b
12
10
a
*
Figure 9: Mean (#177; SD) values (LF / HF)
recorded during the second, fourth week and before Ramadan (n = 9). * (p
<0.05) Significant difference compared to before Ramadan (supine position);
a (p <0.05) Significant difference compared to before Ramadan (standing
position); b (p <0.05) Significant difference compared to before Ramadan
(During effort).
· Supine position: Variance analysis shows a
significant F (2) = 9.82 (p <0.05) effect of Ramadan fasting on LF / HF
ratios (Figure 9).
The post hoc analysis shows that the LF / HF ratios, in supine
position, before Ramadan are significantly higher than those measured in the
middle of the month and at the end of the month of Ramadan (p <0.05).
·
46
Standing position: The analysis of the variance shows a
significant effect F (2) = 8.52; (p <0.05) of Ramadan fasting on the mean
values of the LF / HF ratios (Figure 9).
Post hoc analysis shows that LF / HF ratios before Ramadan,
in standing position, are significantly higher than those measured in the
middle and end of Ramadan (p <0.05).
· During effort: the analysis of the variance
shows a significant effect F (2) = 12,32; (p <0.05) of Ramadan fasting on LF
/ HF ratios (Figure 9).
Post hoc analysis shows that pre-Ramadan LF / HF ratios
during exercise are significantly higher than those measured in the middle and
end of Ramadan (p <0.05).
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