Enhancement of finger blood flow response of postprandial human subjects to the increase in body temperature during exercise

Abstract

The present study was performed to investigate the effect of food intake on thermoregulatory vasodilatation in seven healthy male volunteers. The changes in oesophageal (Toes) and mean skin temperatures, finger and forearm blood flows (BF), oxygen consumption (VO2) and heart rate (fc) with and without food intake were measured before and during a 40-min exercise at an intensity of 35% maximal O2 consumption at an ambient temperature of 25 degrees C. Exercise commenced 60 min after food intake. Ingestion of food equivalent to 50.2 kJ.kg body mass-1 elevated mean body temperature, BF, VO2 and fc in 60 min. Four subjects responded to exercise with a marked increase in finger BF and with no sweating (non-sweating group), while the other three responded with perspiration over almost the whole skin area and with little change in finger BF. Further analyses were made mainly in the non-sweating group. The postprandial increases in Toes, BF, VO2 and fc were persistent during exercise. The rate of increase in finger BF with the increase in Toes and mean body temperature was significantly greater with food intake than without. However, there was no difference in the response of forearm BF to exercise between the two conditions. These results suggested that food intake enhanced finger BF response to the increase in deep body temperature during exercise. It was also concluded that there was a regional difference in cutaneous vasomotor response to thermal load in the postprandial subjects.

Finger cold-induced vasodilation: a review

“…These observations can be explained by diet-induced thermogenesis, which causes an increase in core temperature. The increased core temperature leads to an increased finger blood flow (Hirai et al 1991;Takano and Kotani 1989).…”

Effect of Caffeine Intake on Finger Cold-Induced Vasodilation

“…14,15 It has also been reported that the thermal state of the body significantly influences CIVD, such that hyperthermia increases T f·min and T f·max and hypothermia decreases these finger temperature parameters. 21 ,24,25,30 Thus, it is not unreasonable to speculate that our finding of T f·min maintained at a similar level between NCAFF and CAFF (Figure 3A) indirectly indicates the absence of caffeine-induced thermogenesis in this study. Interestingly, T f·max was also significantly lower in CAFF than NCAFF (Figure 3B), although baseline T re and T f were homogeneously stabilized before all experimental trials.…”

Reproducibility of pulse contour analysis in children before and after maximal exercise stress test: The Physical Activity and Nutrition in Children (PANIC) Study

“…The amplitude of the reflected wave is mainly determined by muscular tone in small arteries, so RI is likely to be more vulnerable to acute changes in sympathetic tone than SI. The postprandial state was worse standardized at the second visit than at the first visit, because the range for the time between the meal and the exercise test was wider that resulted in a larger variation in autonomic effects at the second visit than at the first visit (Hirai et al, 1991;Van baak, 2008). The reason for the observed significant differences in FST between the visits might be explained by the effect of sympathetic tone on blood flow and hence the temperature of the finger (Bornmyr et al, 1998).…”

“…Also, circadian rhythm has an effect on body temperature that may be up to 1°C higher in the afternoons (Kelly, 2006;Varela et al, 2009). The postprandial state was worse standardized at the second visit than at the first visit, because the range for the time between the meal and the exercise test was wider that resulted in a larger variation in autonomic effects at the second visit than at the first visit (Hirai et al, 1991;Van baak, 2008). On the other hand, the respiratory gas analysis at the second visit could also have confounded the measurements after the exercise test, although it could also have brought a similar kind of excitement to the situation as at the first visit.…”

“…, 2009). The postprandial state was worse standardized at the second visit than at the first visit, because the range for the time between the meal and the exercise test was wider that resulted in a larger variation in autonomic effects at the second visit than at the first visit (Hirai et al. , 1991; Van baak, 2008).…”