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Figure 2 Changes in myocardial blood flow (MBF) induced by caffeine. After caffeine consumption, resting MBF increased at hypoxia but not at normoxia, whereas exercise-induced hyperemic flow response was decreased in both groups. Caffeine blunted the hyperemic flow significantly more pronounced at altitude than at normoxia. Open bars = normoxia; solid bars = hypoxia. *p < 0.05 vs. baseline.
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