This study examined whether the adenosine receptor antagonist theophylline prevents the warm-up phenomenon in patients with stable angina undergoing serial exercise tests. Our findings offer evidence that adenosine does not play a role in the warm-up phenomenon, and indirectly suggest that the warm-up phenomenon does not represent ischemic preconditioning in humans.
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http://dx.doi.org/10.1016/s0002-9149(99)00502-0 | DOI Listing |
J Med Internet Res
December 2024
Department of Communication, Cornell University, Ithaca, NY, United States.
Background: Health misinformation is abundant online and becoming an increasingly pressing concern for both oncology practitioners and patients with cancer. On social media platforms, including the popular audiovisual app TikTok, the flourishing alternative health industry is further contributing to the spread of misleading and often harmful information, endangering patients' health and outcomes and sowing distrust of the medical community. The prevalence of false and potentially dangerous treatments on a platform that is used as a quasi-search engine by young people poses a serious risk to the health of patients with cancer.
View Article and Find Full Text PDFAdv Exp Med Biol
October 2024
Institute for Human Movement and Medical Sciences, Niigata University of Health and Welfare, Niigata, Japan.
The high concentration of oxygenated haemoglobin (OHb) in the prefrontal cortex (PFC) during exercise improves cognitive performance. In this study, we aimed to elucidate the relationship of cognitive function with the OHb concentration difference between the left and right PFC (L-PFC and R-PFC, respectively) during sustained exercise. We enrolled 12 healthy adult males who, after a 4-min rest and warm-up, performed a 40-min exercise regime at a workload corresponding to 50% maximal oxygen consumption.
View Article and Find Full Text PDFEur J Case Rep Intern Med
September 2024
Department of Ophthalmology, Sawai Man Singh Medical College, Jaipur, India.
Am J Physiol Heart Circ Physiol
October 2024
Human Cardiovascular Physiology Laboratory, Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada.
Exaggerated blood pressure (BP) responses during exercise are independently associated with future development of hypertension. Partial sleep deprivation (PSD) can increase 24-h ambulatory BP, but the effects on exercise BP are unclear. We hypothesized that acute PSD would augment the BP response to constant load cycling exercise and a 20-min time trial.
View Article and Find Full Text PDFInvest Ophthalmol Vis Sci
August 2024
Herbert Wertheim School of Optometry & Vision Science, University of California - Berkeley, Berkeley California, United States.
Purpose: We determined interblink corneal surface-temperature decline and tear-film evaporation rates of localized tear breakup cold regions (LCRs) and localized tear unbroken warm regions (LWRs) of the corneal surface, as well as that of the overall average corneal surface.
Methods: Each subject underwent 4 inter-day visits where the interblink corneal surface-temperature history of the right eye was measured using a FLIR A655sc infrared thermographer. Corneal surface temperature history was analyzed to determine the overall, LCR, and LWR temperature-decline rates.
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