Subjektiivse aja tajumise adaptatsiooniefekt ja seos meeleoluga aklimatiseerumisele suunatud kuumatreeningprogrammi ajal

The present work was concerned with changes in subjective interval timing in conditions of elevated temperature and physical exercise. It has been proven by previous studies that subjective time perception is prone to acceleration when exposed to these conditions, but that a process of acclimatization may mitigate this effect. In light of this, an experimental study consisting of two capacity tests and an eight-day acclimation training program was conducted, in which test subjects went through treadmill exercise in a controlled climate chamber. The objective of the study was to find out which of the parameters of the training were adequate predictors of the adaption of subjective time perception and whether general mood arousal has an influence on the acceleration effect. The results of the study also demonstrated the adaption effect. From the training parameters, heart rate was most associated with adaption. No outstanding connection between general mood state and the acceleration of subjective time was detected. Keywords: acceleration of subjective time, physical exercise, heat stress, acclimatization, mood.http://tartu.ester.ee/record=b2596459~S1*es

Stress and the Immune Response in Rats

The &lt;i&gt;in vitro&lt;/i&gt; response of sensitized splenic lymphocytes to antigen (thyroglobulin) was increased by crowding and decreased by isolation in female rats. Both isolated and crowded male rats responded by a decrease in the &lt;i&gt;in vitro&lt;/i&gt; reactivity of lymphocytes to antigen. The response of the lymphocytes to PHA was not altered in any consistent manner. Similar animals, both control and those immunized with thyroglobulin, were tested for an effect of &lt;i&gt;in vivo&lt;/i&gt; injections of epinephrine on the &lt;i&gt;in vitro&lt;/i&gt; reactivity of lymphocytes; epinephrine was given intraperitoneally 30min before the rats were killed for removal of spleens. Incorporation of &lt;sup&gt;3&lt;/sup&gt;H-thymidine by lymphocytes was greater in control cultures (neither PHA nor antigen present) but there was a decreased response to either PHA or antigen when epinephrine had been injected.</jats:p