{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,6,5]],"date-time":"2026-06-05T02:35:37Z","timestamp":1780626937957,"version":"3.54.1"},"reference-count":71,"publisher":"American Physiological Society","issue":"6","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Journal of Applied Physiology"],"published-print":{"date-parts":[[2011,12]]},"abstract":"<jats:p> The negative effects of sympathetic overactivity on long-term cardiovascular health are becoming increasingly clear. Moreover, recent work done in animal models of cardiovascular disease suggests that sympathetic tone to the splanchnic vasculature may play an important role in the development and maintenance of these disease states. Work from our laboratory and others led us to hypothesize that a lack of chronic physical activity increases resting and reflex-mediated splanchnic sympathetic nerve activity, possibly through changes occurring in a key brain stem center involved in sympathetic regulation, the rostral ventrolateral medulla (RVLM). To address this hypothesis, we recorded mean arterial pressure (MAP) and splanchnic sympathetic nerve activity (SSNA) in a group of active and sedentary animals that had been housed for 10\u201313 wk with or without running wheels, respectively. In experiments performed under Inactin anesthesia, we tested responses to RVLM microinjections of glutamate, responses to baroreceptor unloading, and vascular reactivity, the latter of which was performed under conditions of autonomic blockade. Sedentary animals exhibited enhanced resting SSNA and MAP, augmented increases in SSNA to RVLM activation and baroreceptor unloading, and enhanced vascular reactivity to \u03b1<jats:sub>1<\/jats:sub>-receptor mediated vasoconstriction. Our results suggest that a sedentary lifestyle increases the risk of cardiovascular disease by augmenting resting and reflex-mediated sympathetic output to the splanchnic circulation and also by increasing vascular sensitivity to adrenergic stimulation. We speculate that regular physical exercise offsets or reverses the progression of these disease processes via similar or disparate mechanisms and warrant further examination into physical (in)activity-induced sympathetic nervous system plasticity. <\/jats:p>","DOI":"10.1152\/japplphysiol.00961.2011","type":"journal-article","created":{"date-parts":[[2011,10,6]],"date-time":"2011-10-06T20:53:46Z","timestamp":1317934426000},"page":"1854-1862","source":"Crossref","is-referenced-by-count":38,"title":["(In)activity-dependent alterations in resting and reflex control of splanchnic sympathetic nerve activity"],"prefix":"10.1152","volume":"111","author":[{"given":"Nicholas A.","family":"Mischel","sequence":"first","affiliation":[{"name":"Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Patrick J.","family":"Mueller","sequence":"additional","affiliation":[{"name":"Department of Physiology, 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