TFau wrote:Hi Everyone:
I'm just wondering, for those who have been treated for CCSVI, have you noticed that you can exercise a bit more than before, and can you tell if you are having any lasting benefits, such as less foot drop, for example, for the workout?
LR1234 wrote:Thanks for replying KC.
So what other things have you tried?
So you have tried Abx
Best Bet Diet?
I have never really exercised before, I am very small and thin and people think i must work out a lot but I am sooo unfit! I just hope that exercising will help x
Inadequate heat release from the human brain during
prolonged exercise with hyperthermia
Lars Nybo, Niels H. Secher* and Bodil Nielsen
Department of Human Physiology, Institute of Exercise and Sport Sciences and *Department of Anesthesia, Rigshospitalet and CMRC, University of
Brain temperature appears to be an important factor affecting motor activity, but it is not known to what extent brain temperature increases during prolonged exercise in humans. Cerebral heat exchange was therefore evaluated in seven males during exercise with and without hyperthermia.
Middle cerebral artery mean blood velocity (MCA Vmean) was continuously monitored while global cerebral blood flow (CBF) and cerebral energy turnover were determined at the end of the two exercise trials in three subjects. The arterial to venous temperature difference across the brain
(v–aDtemp) was determined via thermocouples placed in the internal jugular vein and in the aorta. The jugular venous blood temperature was always higher than that of the arterial blood, demonstrating that heat was released via the CBF during the normothermic as well as the hyperthermic exercise condition. However, heat removal via the jugular venous blood was 30 ± 6% lower during hyperthermia compared to the control trial. The reduced heat removal from the brain was mainly a result of a 20 ± 6 % lower CBF (22 ± 9 % reduction in MCA Vmean), because the v–aDtemp was not significantly different in the hyperthermic (0.20 ± 0.05 °C) compared to the control trial (0.22 ± 0.05 °C). During hyperthermia, the impaired heat removal via the blood was combined with a 7 ± 2 % higher heat production in the brain and heat was consequently stored in
the brain at a rate of 0.20 ± 0.06 J g_1 min_1. The present results indicate that the average brain temperature is at least 0.2 °C higher than that of the body core during exercise with or without hyperthermia.
The lowering of
the head skin temperatures was not associated with a
reduction in RPE, and the degree of exertion during
exercise in the heat did not appear to be directly related to
the perception of thermal comfort. Rather, the subjects’
rating of perceived exertion seemed to increase in parallel
with the jugular and arterial blood temperatures.
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