HYPOTHESIS: We hypothesize that an acute 45-minute brisk walking exercise bout (60% VO2max) following 2 weeks of increased polyphenol intake will be a sufficient exercise stimulus to increase gut permeability and the movement of gut-derived phenolics into circulation. If this hypothesis is confirmed, these data would have broad public health appeal, demonstrating that the combination of brisk walking and increased polyphenol intake augments circulating levels of health-restoring small phenolic molecules derived from bacterial breakdown in the colon.