Scientific journal

European Journal of Natural History

ISSN 2073-4972

ИФ РИНЦ = 0,301

An impact of a healthy lifestyle, including a type and regime of diet upon functional condition of children is studied insufficiently in age physiology and hygiene [2]. A rational diet plays an especially important part in providing for an optimal psycho-physical condition of a growing organism.

Functional condition of heart was studied among pupils of 1-3^rd grade with different eating regime: group 1 - children who had breakfast at school regularly (GN) and group 2 - those who did not have breakfast at school (GP). For a test strain the children kept static tension on a hand dynamometer of 1/3 of its maximum strength. In rest and during the strain, heart rate (HR) and blood pressure (BP) was measured.

The results of our study have shown that HR indexes in rest among all 1^st grade boys didn´t differ (table), while among the girls of GN group in the 1^st grade HR in rest was reliably higher than among girls of GP group. Among 2^nd grade boys of GN group HR in rest was reliably higher than that of GP group, and among girls of GP group HR in rest was the opposite - reliably higher than that of GN. In the 3^rd grade HR in rest was reliably higher among pupils of GP group, compared to GN.

Changes in heart rate and blood pressure after local work of schoolchildren

Notes: B - boys, G - girls; I - GN, II - GP; ** - significant differences between I and II.

BPS indexes in rest among 1^st grade boys did not differ significantly between GP and GN, and among girls of GP they were reliably higher. Among boys of GP from the 2^nd grade indexes of systolic BP (BPS) were reliably higher than that of GN. In the 3^rd grade BPS was higher among girls of GN than of GP. Diastolic BP (BPS) in rest among pupils of GP was higher than of GN, except for the 3^rd grade girls.

Local strain caused an increase in heart beat among all children differently. Thus, in the 1^st grade a reliable increase in HR was registered under tension. In the nd and 3^rd grade among boys of GN it was less obvious than among boys of GP. Among girls of the 1^st group a greater increase in HR was registered under tension than among girls of GP group.

Reaction of BPS among children of GN group of the 2^nd and 3^rd grade against local tension was more obvious than among children of GP group. BPD indexes under local tension among all children of GP were significantly higher, except for girls of the 3^rd grade.

Thus, for primary school pupils who don´t eat regularly, an increase in vascular resistance is a typical side of adaptation to school loading, as proved by indexes of BPD in rest and under a local strain. Continuous breaks and disbalance in diet can lead to disruptions in homeostasis and functional condition of organism among children and adults [1, 3]. The data of our research states an increased level in functional heart tension among children with continuous breaks between meals.

1. Salamaykin N.I., Kolodina E.V. Incretion of ferments of digestive glands of children of different ages // Physiology of human development: Materials of international conference. - 2000.
2. Chastoyedova I.A., Kamakin N.F. Pepsinogen and amylase of large bowel among children of early ages // Physiology of human development: Materials of international conference. - 2000.
3. Thompson Y. Blood lead levels and children beh.: results from the Edinburgh lead study // Child psychol. Psychiatry. - 1989. - Vol. 30, № 4. - P. 515-528.