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We tested the hypothesis that exercise training will mitigate prostate cancer-induced cardiac and skeletal muscle atrophy and improve LV function versus sedentary tumor-bearing counterparts. Copenhagen rats ( n = 39; ~5 mo old) were randomized into four groups: exercise-trained tumor-bearing (EXTB) or control (EXCON) and sedentary tumor-bearing (SEDTB) or control (SEDCON). Dunning R-3327 prostate cancer cells were injected orthotopically in 19 of the 39 animals. Treadmill exercise training was performed for 60 min\/day for ~30 days. Animals underwent echocardiography to examine ventricle dimensions \u201cPre-\u201d cancer injection or exercise (PRE) and 15 (Post 1) and 32\u201335 (Post 2) days after cancer cell injection with tissues collected after Post 2. LV TNF-\u03b1 and IL-6 concentrations were measured post mortem. Cardiac and LV mass of SEDTB animals were lower than all groups ( P &lt; 0.05). Tumor mass was negatively correlated with LV mass in EXTB (\u22120.75, P &lt; 0.02) and SEDTB animals (\u22120.72, P &lt; 0.02). EXCON group had higher stroke volume Post 2 assessment compared with both sedentary groups ( P &lt; 0.05) but not EXTB animals. No difference in LV [IL-6] or [TNF-\u03b1] was found between the cancer groups. The current investigation demonstrates prostate cancer, independent of anticancer treatment, significantly reduces cardiac mass and LV mass as well as locomotor muscle masses. However, moderate-intensity exercise training can mitigate cardiac and skeletal muscle atrophy with prostate cancer and preserve the cardiac phenotype (i.e., mass and function) to that of the healthy sedentary group.<\/jats:p><jats:p>NEW &amp; NOTEWORTHY This study demonstrates the atrophic effects of prostate cancer on cardiac and skeletal muscle mass independent of anticancer treatment(s) that can be mitigated with moderate-intensity exercise. These findings have important implications for potentially improving the quality of life as well as therapeutic outcomes for patients with prostate cancer.<\/jats:p>","DOI":"10.1152\/japplphysiol.00829.2018","type":"journal-article","created":{"date-parts":[[2018,12,20]],"date-time":"2018-12-20T17:55:21Z","timestamp":1545328521000},"page":"668-680","source":"Crossref","is-referenced-by-count":12,"title":["Effects of prostate cancer and exercise training on left ventricular function and cardiac and skeletal muscle mass"],"prefix":"10.1152","volume":"126","author":[{"given":"Dryden R.","family":"Baumfalk","sequence":"first","affiliation":[{"name":"Department of Kinesiology, Kansas State University, Manhattan, Kansas"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4589-3776","authenticated-orcid":false,"given":"Alexander B.","family":"Opoku-Acheampong","sequence":"additional","affiliation":[{"name":"Department of Kinesiology, Kansas State 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