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DOI: 10.1055/s-0029-1243616
© Georg Thieme Verlag KG Stuttgart · New York
Bone Status in Professional Cyclists
Publication History
accepted after revision November 18, 2009
Publication Date:
29 April 2010 (online)
Abstract
Professional cycling combines extensive endurance training with non weight-bearing exercise, two factors often associated with lower bone mineral density (BMD). Therefore BMD was measured with dual-energy x-ray absorptiometry in 30 professional road cyclists (mean (SD) age: 29.1 (3.4) years; height: 178.5 (6.7) cm; weight: 71.3 (6.1) kg; %fat mass: 9.7 (3.2)%; V˙O2max: 70.5 (5.5) ml·kg−1·min−1) and in 30 young healthy males used as reference (28.6 (4.5) years; 176.5 (6.3) cm; 73.4 (7.3) kg; 20.7 (5.8)%). Adjusting for differences in age, height, fat mass, lean body mass, and calcium intake by ANCOVA, professional cyclists had similar head BMD (p=0.383) but lower total body (1.135 (0.071) vs. 1.248 (0.104) g·cm−2; p<0.001), arms (0.903 (0.075) vs. 0.950 (0.085), p=0.028), legs (1.290 (0.112) vs. 1.479 (0.138); p<0.001), spine (0.948 (0.100) vs. 1.117 (0.147) g·cm−2; p<0.001), pelvis (1.054 (0.084) vs. 1.244 (0.142), p<0.001), lumbar spine (1.046 (0.103) vs. 1.244 (0.167), P<0.001), and femoral neck BMD (0.900 (0.115) vs. 1.093 (0.137), p<0.001) compared to reference subjects. Professional cycling appears to negatively affect BMD in young healthy and highly active males, the femoral neck being the most affected site (−18%) in spite of the elevated muscle contractions inherent to the activity.
Key words
bone density - dietary calcium - dual-energy x-ray absorptiometry - professional cycling - endurance training
References
- 1 Ammann P, Rizzoli R. Bone strength and its determinants. Osteoporos Int. 2003; 14 (S 03) 13-18
- 2 Brahm H, Strom H, Piehl-Aulin K, Mallmin H, Ljunghall S. Bone metabolism in endurance trained athletes: a comparison to population-based controls based on DXA, SXA, quantitative ultrasound, and biochemical markers. Calcif Tissue Int. 1997; 61 448-454
- 3 Burrows M, Nevill AM, Bird S, Simpson D. Physiological factors associated with low bone mineral density in female endurance runners. Br J Sports Med. 2003; 37 67-71
- 4 Clark EM, Tobias JH, Ness A. Association between bone density and fractures in children: A systematic review and meta-analysis. Pediatrics. 2003; 117 e291-e297
- 5 Fardellone P, Sebert JL, Bouraya M, Bonidan O, Leclercq G, Doutrellot PL, Bellony R, Dubreuil A. Evaluation of the calcium content of diet by frequential self-questionnaire. Rev Rhum Mal Osteoartic. 1991; 58 99-103
- 6 Fiore CE, Dieli M, Vintaloro G, Gibilaro M, Giacone G, Cottini E. Body composition and bone mineral density in competitive athletes in different sports. Int J Tissue React. 1996; 18 121-124
- 7 Gärdsell P, Johnell O, Nilsson BE. The predictive value of forearm bone mineral content measurements in men. Bone. 1990; 11 229-232
- 8 Harris DJ, Atkinson G. International Journal of Sports Medicine - Ethical Standards in Sport and Exercise Science Research. Int J Sports Med. 2009; 30 701-702
- 9 Hetland ML, Haarbo J, Christiansen C. Low bone mass and high bone turnover in male long distance runners. J Clin Endocrinol Metab. 1993; 77 770-775
- 10 Hind K, Truscott JG, Evans JA. Low lumbar spine bone mineral density in both male and female endurance runners. Bone. 2006; 39 880-885
- 11 Jones G, Boon P. Which bone mass measures discriminate adolescents who have fractured from those who have not?. Osteoporos Int. 2008; 19 251-255
- 12 Kemmler W, Engelke K, Baumann H, Beeskow C, von Stengel S, Weineck J, Kalender WA. Bone status in elite male runners. Eur J Appl Physiol. 2006; 96 78-85
- 13 Lucia A, Pardo J, Durantez A, Hoyos J, Chicharro JL. Physiological differences between professional and elite road cyclists. Int J Sports Med. 1998; 19 342-348
- 14 MacDougall JD, Webber CE, Martin J, Ormerod S, Chesley A, Younglai EV, Gordon CL, Blimkie CJ. Relationship among running mileage, bone density, and serum testosterone in male runners. J Appl Physiol. 1992; 73 1165-1170
- 15 Mackey DC, Lui LY, Cawthon PM, Bauer DC, Nevitt MC, Cauley JA, Hillier TA, Lewis CE, Barrett-Connor E, Cummings SR. Study of Osteoporotic Fractures (SOF) and Osteoporotic Fractures in Men Study (MrOS) Research Groups. High-trauma fractures and low bone mineral density in older women and men. JAMA. 2007; 298 2381-2388
- 16 Maimoun L, Lumbroso S, Manetta J, Paris F, Leroux JL, Sultan C. Testosterone is significantly reduced in endurance athletes without impact on bone mineral density. Horm Res. 2003; 59 285-292
- 17 Medelli J, Lounana J, Menuet JJ, Shabani M, Cordero-Macintyre Z. Is osteopenia a health risk in professional cyclists?. J Clin Densitom. 2009; 12 28-34
- 18 Medelli J, Shabani M, Lounana J, Fardellone P, Campion F. Low bone mineral density and calcium intake in elite cyclists. J Sports Med Phys Fitness. 2009; 49 44-53
- 19 Melton 3rd LJ, Atkinson EJ, O'Connor MK, O'Fallon WM, Riggs BL. Bone density and fracture risk in men. J Bone Miner Res. 1998; 13 1915-1923
- 20 Myburgh KH, Hutchins J, Fataar AB, Hough SF, Noakes TD. Low bone density is an etiologic factor for stress fractures in athletes. Ann Intern Med. 1990; 113 754-759
- 21 Nevill A, Holder R, Stewart A. Do sporting activities convey benefits to bone mass throughout the skeleton?. J Sports Sci. 2004; 22 645-650
- 22 Nevill AM, Holder RL, Maffulli N, Cheng JC, Leung SS, Lee WT, Lau JT. Adjusting bone mass for differences in projected bone area and other confounding variables: an allometric perspective. J Bone Miner Res. 2002; 17 703-708
- 23 Nevill AM, Holder RL, Stewart AD. Modeling elite male athletes' peripheral bone mass, assessed using regional dual x-ray absorptiometry. Bone. 2003; 32 62-68
- 24 Nichols JF, Palmer JE, Levy SS. Low bone mineral density in highly trained male master cyclists. Osteoporos Int. 2003; 14 644-649
- 25 Optimal Calcium Intake. NIH Consensus Statement. 1994; 12 1-31
- 26 Rico H, Revilla M, Hernandez F, Gomez–Castresana F, Villa L. Bone mineral content and body composition in postpubertal cyclist boys. Bone. 1993; 14 93-95
- 27 Rivara FP, Thompson DC, Thompson RS. Epidemiology of bicycle injuries and risk factors for serious injury. Inj Prev. 1997; 3 110-114
- 28 Sabo D, Bernd L, Pfeil J, Reiter A. Bone quality in lumbar spine in high-performance athletes. Eur Spine J. 1996; 5 258-263
- 29 Smathers AM, Bemben MG, Bemben DA. Bone density comparisons in male competitive road cyclists and untrained controls. Med Sci Sports Exerc. 2009; 41 290-296
- 30 Stewart AD, Hannan J. Total and regional bone density in male runners, cyclists, and controls. Med Sci Sports Exerc. 2000; 32 1373-1377
- 31 Warner SE, Dalsky GP. Bone mineral density of elite male cyclists (Abstract). Med Sci Sports Exerc. 1997; 29 S5
- 32 Warner SE, Shaw JM, Dalsky GP. Bone mineral density of competitive male mountain and road cyclists. Bone. 2002; 30 281-286
Correspondence
Dr. Frederic Campion
Clinical and Molecular
Osteoporosis Research Unit
Department of Clinical Sciences
and Orthopaedic Surgery
Lund University
Malmö University Hospital
SE-205 02 Malmö
Sweden
Phone: +4640331000
Fax: +4640336200
Email: fcampion@vo2max.org