nutrients Review A Vicious Cycle of Osteosarcopenia in Inflammatory Bowel Diseases—Aetiology, Clinical Implications and Therapeutic Perspectives Dorota Skrzypczak *, Alicja Ewa Ratajczak , Aleksandra Szymczak-Tomczak, Agnieszka Dobrowolska , Piotr Eder and Iwona Krela-Ka´zmierczak* Department of Gastroenterology, Dietetics and Internal Diseases, Poznan University of Medical Sciences, 49 Przybyszewskiego Street, 60-355 Poznan, Poland;
[email protected] (A.E.R.);
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[email protected] (A.D.);
[email protected] (P.E.) * Correspondence:
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[email protected] (I.K.-K.) Abstract: Sarcopenia is a disorder characterized by a loss of muscle mass which leads to the reduction of muscle strength and a decrease in the quality and quantity of muscle. It was previously thought that sarcopenia was specific to ageing. However, sarcopenia may affect patients suffering from chronic diseases throughout their entire lives. A decreased mass of muscle and bone is common among patients with inflammatory bowel disease (IBD). Since sarcopenia and osteoporosis are closely linked, they should be diagnosed as mutual consequences of IBD. Additionally, multidirectional treatment of sarcopenia and osteoporosis including nutrition, physical activity, and pharmacotherapy should include both disorders, referred to as osteosarcopenia. Keywords: sarcopenia; IBD; Crohn’s disease; ulcerative colitis; malnutrition; low muscle mass; low muscle strength; nutritional therapy Citation: Skrzypczak, D.; Ratajczak, A.E.; Szymczak-Tomczak, A.; Dobrowolska, A.; Eder, P.; Krela-Ka´zmierczak, I. A Vicious Cycle 1. Introduction of Osteosarcopenia in Inflammatory Bowel Diseases—Aetiology, Clinical Sarcopenia is a syndrome associated with a reduction of skeletal muscle mass, leading Implications and Therapeutic to decreased muscle strength [1].