| Abstract: | Human health varies in different seasons. There is an individual yearly health cycle (IYHC). The authors examined variations in working capacity (WC), stress inclination (SI), immunity (salivary IgA), biological age (BA), and integral health index (IHI) in 157 apparently healthy students in different months and terms of an individual year--from one birthday to the next one. SI was estimated by several methods. Variations in cardiac rhythm, mathematical problem solution-induced changes in cardiac rhythm and blood pressure, colour preferences (after Lusher), anxiety (after Taylor) and the number of nerve rings of the iris. In young men, the second term of IVHC, i.e. months 4 to 6 of their birthday, was the best for health and the fourth term was the worst. In the last term (months 10 to 12), the mean IHI was 30% lower than that in the second term; elevated blood pressure was found in 30.3% of the students, WC and salivary IgA showed the lowest values and SI and BA did the highest ones. In the girls, these changes were less pronounced and the first term was the best. The association of these individual yearly health variations with birth stress described by H. Lagercrantz and T. Slotkin (1986) is discussed. |
