caa a22 4500 467941580 CHVBK 20180406153014.0 cr unu---uuuuu 170328e20060501xx s 000 0 eng 10.1007/s00421-006-0158-0 doi (NATIONALLICENCE)springer-10.1007/s00421-006-0158-0 Bone metabolism in elite male rowers: adaptation to volume-extended training [Elektronische Daten] [Jaak Jürimäe, Priit Purge, Toivo Jürimäe, Serge von Duvillard] We examined the effect of 6-month volume-extended training on bone metabolism in elite male rowers. Twelve elite male rowers (20.8±3.0years; 192.9±4.7cm; 91.9±5.3kg; body fat 10.1±2.3%; $$V_{{{\text{O}}_{{\text{2}}}\,{\text{max}}}} $$ 6.2±0.5lmin−1) participated in this study. Bone biochemical markers, hormones, bone mineral content (BMC), and bone mineral density (BMD) were assessed before and after training. Average weekly training volume was significantly higher (P<0.05) during the 6months of heavy training compared to relative rest (11.6±0.4hweek−1 vs. 16.8±0.6hweek−1), while intensity remained the same. At the end of training, only arm BMD was significantly increased by 5.7%. Osteocalcin (16.6%), insulin-like growth factor-1 (IGF-1) (20.2%) and the bioavailability IGF-1 index (17.9%) were significantly increased. Before heavy training, relationships were observed between the whole body BMD and growth hormone (r=0.64; P≤0.02), lumbar spine BMD and 1.25(OH)2 vitamin D (r=0.69; P≤0.04), arm BMD and testosterone (r=0.59; P≤0.05), and arm BMD and adiponectin (r=0.59; P≤0.05). No relationship was found between BMC or BMD and blood biochemical measures 6months later (r=0.56; P≥0.05). In addition, osteocalcin was related to IGF-1 (r>0.58; P<0.048) and bioavailability IGF-1 index (r>0.59; P≤0.055) before and after training. In summary, heavy training had a moderately favorable effect on BMD. Bone tissue at specific skeleton sites is sensitive to changes in training volume even in athletes with already high BMD values. Changes in BMD and bone formation may be caused by changes in specific hormones such as IGF-1 and adiponectin in male athletes. Springer-Verlag, 2006 Bone mass nationallicence Bone density threshold nationallicence Adiponectin nationallicence IGF-1 nationallicence Elite rowers nationallicence Jürimäe Jaak Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut Purge Priit Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut Jürimäe Toivo Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut von Duvillard Serge Human Performance Laboratory, Department of Health and Human Performance, Texas A&M University-Commerce, 3011, 75429-3011, Commerce, TX, USA aut European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 127-132 1439-6319 97:1<127 2006 97 421 https://doi.org/10.1007/s00421-006-0158-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00421-006-0158-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Jürimäe Jaak Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut NATIONALLICENCE 700 1- Purge Priit Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut NATIONALLICENCE 700 1- Jürimäe Toivo Institute of Sport Pedagogy and Coaching Sciences, University of Tartu, Tartu, Estonia aut NATIONALLICENCE 700 1- von Duvillard Serge Human Performance Laboratory, Department of Health and Human Performance, Texas A&M University-Commerce, 3011, 75429-3011, Commerce, TX, USA aut NATIONALLICENCE 773 0- European Journal of Applied Physiology Springer-Verlag 97/1(2006-05-01), 127-132 1439-6319 97:1<127 2006 97 421 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer