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Zouhal H, Berro AJ, Maliha E, Khalil N, El Khoury G, Jayavel A, Laziri F, Saeidi A, Laher I, El Hage R. Team sports practice and bone health: A systematic review and meta- analysis. J Clin Densitom 2024; 27:101508. [PMID: 39068702 DOI: 10.1016/j.jocd.2024.101508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2024] [Revised: 06/27/2024] [Accepted: 07/10/2024] [Indexed: 07/30/2024]
Abstract
The primary aim of this study was to explore the effects of team sports practice on bone health indices in adults engaged in team sports. The secondary aim was to investigate the osteogenic effects of each type of team sport. This systematic literature search was conducted using common electronic databases from inception in June 2023, using key terms (and synonyms searched for by the MeSH database) that were combined using the operators "AND", "OR", "NOT": (``men'' OR ``man'' OR ``women'' OR ``woman'') AND (``bone mineral density'' OR ``BMD'' OR ``bone mineral content'' OR ``BMC'' OR ``peak bone mass'' OR ``mechanical loading'' OR ``osteoporosis'' OR ``bone geometry'' OR ``bone resistance'') AND (``team sport'' OR ``sport'' OR rugby OR basketball OR volleyball OR handball OR soccer OR football OR ``players''). After screening, 16 studies were included in the final analysis (5 continents, 2740 participants). The training duration lasted 1 to 13 years. Team sport training had a moderate impact on whole body bone mineral density (WB BMD) (1.07 SMD; 95 % [0.77, 1.37], p < 0.00) but a more significant impact on whole body bone mineral content (WB BMC) (1.3 SMD; 95 % [0.81, 1.79], p < 0.00). Subgroup analyses indicated that rugby training had a moderate but non-significant impact on WB BMD (1.19 SMD; 95 % [-0.13, 2.52], p = 0.08) but a greater impact on WB BMC (2.12 SMD; 95 % [0.84, 3.39], p < 0.00); basketball training had a moderate but significant impact on WB BMD (1 SMD; 95 % [0.35, 1.64], p < 0.00) and a trivial non-significant impact on WB BMC (0.18 SMD; 95 % [-1.09, 1.46], p = 0.78); volleyball training had a moderate but non-significant impact on WB BMD (0.63 SMD; 95 % [-0.22, 1.49], p = 0.15) and a significant impact on WB BMC (2.39 SMD; 95 % [1.45, 3.33], p < 0.00). Handball training produced a moderate significant impact on WB BMD (1.02 SMD; 95 % [0.33, 1.71], p < 0.00) and WB BMC (0.97 SMD; 95 % [0.47, 1.48], p < 0.00), and soccer training led to moderate but significant effects on WB BMD (1.16 SMD; 95 % [0.88, 1.44], p < 0.00) and a large effect on WB BMC (1.34 SMD; 95 % [0.92, 1.77], p < 0.00). Rugby training was associated with a higher WB BMC compared to basketball training (p = 0.03). Our systematic review and meta-analysis suggests that team sports, such as rugby, basketball, volleyball, handball and soccer have moderate to large effects on WB BMD and WB BMC. Specifically, our findings indicate that handball and soccer enhance WB BMD and WB BMC, whereas rugby only increases WB BMC. There is currently insufficient evidence indicating the superiority of any type of sport training that improves bone health in adults.
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Affiliation(s)
- Hassane Zouhal
- University of Rennes, M2S (Laboratoire Mouvement, Sport, Santé) - EA 1274, F-35000 Rennes, France; Institut International des Sciences du Sport (2I2S), 35850 Irodouer, France
| | - Abdel-Jalil Berro
- Department of Physical Education, Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon
| | - Elie Maliha
- Department of Physical Education, Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon
| | - Nour Khalil
- Department of Physical Education, Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon
| | - Gisèle El Khoury
- Department of Physical Education, Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon
| | - Ayyappan Jayavel
- SRM College of Physiotherapy, SRM Institute of Science and Technology, Kattankulathur, Kanchipuram, India
| | - Fatiha Laziri
- Laboratoire Ecologie, Environnement et Santé Equipe Santé Humaine et Environnement Faculté des Sciences de Université Moulay Ismail, Meknès, Morocco
| | - Ayoub Saeidi
- Department of Physical Education and Sport Sciences, University of Kurdistan, Sanandaj, Iran
| | - Ismail Laher
- Department of Anesthesiology, Pharmacology and Therapeutics, The University of British Columbia, Vancouver, Canada
| | - Rawad El Hage
- Department of Physical Education, Faculty of Arts and Sciences, University of Balamand, PO Box 100, Tripoli, Lebanon.
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2
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Entwistle I, Francis P, Lees M, Hume P, Hind K. Lean Mass, Muscle Strength, and Muscle Quality in Retired Rugby Players: The UK Rugby Health Project. Int J Sports Med 2022; 43:958-963. [PMID: 35767990 DOI: 10.1055/a-1854-0052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
Although athletes from sports such as rugby have greater lean mass and strength during their playing careers, little is known about these characteristics post-retirement. Therefore, this study investigated lean mass, strength, and muscle quality in retired elite and amateur rugby players and non-contact athletes. Retired elite male rugby players (n=42, 43.9±10.3 y; 101.1±13.4 kg; 1.82±0.09 m), amateur rugby players (n=46, 48.0±10.5 y; 98.9±16.6 kg; 1.79±0.07 m) and non-contact athletes (n=30, 51.3±12.5 y; 91.3±13.4 kg; 1.79±0.07 m) received one total body dual-energy X-ray absorptiometry assessment of appendicular lean mass (ALM) and ALM index (ALMI). Grip strength was measured, and muscle quality (grip strength/unit of arm lean mass) was calculated. Sarcopenia was identified as ALMI<7.23 kg/m2 and handgrip strength<37.2 kg. Total lean mass, ALM and grip strength were greater in the elite rugby compared to amateur rugby and non-contact groups (p<0.01). There were no significant differences in muscle quality or sarcopenia prevalence. Retired elite rugby players had greater lean mass and grip strength than amateur rugby and non-contact athletes, although muscle quality was similar. The greater lean mass and strength might reflect genetic influences or previous participation in a highly physical sport.
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Affiliation(s)
- Ian Entwistle
- Department of Sport and Exercise Sciences, Durham University, Durham, United Kingdom of Great Britain and Northern Ireland.,Wolfson Research Institute for Health and Wellbeing, Durham University, Durham, United Kingdom of Great Britain and Northern Ireland
| | - Peter Francis
- Department of Science and Health, Institute of Technology Carlow, Carlow, Ireland
| | - Matthew Lees
- Faculty of Kinesiology and Physical Education, University of Toronto, Toronto, Canada
| | - Patria Hume
- Sports Performance Research Institute New Zealand, Auckland University of Technology, Auckland, New Zealand
| | - Karen Hind
- Department of Sport and Exercise Sciences, Durham University, Durham, United Kingdom of Great Britain and Northern Ireland.,Wolfson Research Institute for Health and Wellbeing, Durham University, Durham, United Kingdom of Great Britain and Northern Ireland
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Maillane-Vanegas S, Luiz-de-Marco R, Narciso PH, Faustino-da-Silva YVDS, Kemper H, Ribeiro Agostinete R, A Fernandes R. More than Sports Participation: The Role of Ground Reaction Force, Osteocalcin and Lean Soft Tissue on Bone Density Accrual in Adolescents: ABCD Growth Study. J Clin Densitom 2022; 25:61-72. [PMID: 34391643 DOI: 10.1016/j.jocd.2021.07.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/27/2021] [Revised: 06/21/2021] [Accepted: 07/06/2021] [Indexed: 11/22/2022]
Abstract
The objective of this study was to identify predictors of 12-mo areal bone density accrual in different body segments, lean soft tissue, and osteogenic characteristics attributed to sports participation among adolescent girls and boys. Adolescents (Girls [n = 64], [aged = 14.7]); Boys [n = 129], [aged = 14.6]) were stratified into three groups according to their engagement in different sports (Control [n = 68], Swimming [n = 25], and Weight-bearing sports [n = 100]). Areal bone density (aBMD [g/cm²]) and lean soft tissue (LST) [kg] were measured by dual-energy x-ray absorptiometry (DXA; Lunar DPX-NT; General Electric Healthcare, Little Chalfont, Buckinghamshire, United Kingdom). The ground reaction force (GRF) index attributed to sports participation (Sport-GRF) was created considering the GRF attributed to each sport, body weight of the adolescent, and the amount of time spent in sports participation. Osteocalcin levels (ng/mL) were estimated from a venous blood sample. Multiple regression analysis showed that after adjusting for covariates, the models involving sport-GRF, LST (Δ), and osteocalcin explained 15.8% to 76.2% of the aBMD gains. Specifically in girls, OC was only associated with lower limb aBMD accrual. In boys, however, sport ground reaction forces were positively associated with total spine aBMD accrual. Furthermore, the LST (Δ) was positively associated with aBMD accrual in all body sites (β = 0.003 to 0.011) in both sexes. Increases in LST contributed significantly to gains in aBMD accrual in both sexes, being a more important predictor of changes in bone outcomes than ground reaction forces and osteocalcin.
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Affiliation(s)
- Santiago Maillane-Vanegas
- Post-Graduation Program in Movement Sciences, Sao Paulo State University (UNESP), Presidente Prudente, Brazil; Laboratory of InVestigation in Exercise LIVE, Department of Physical Education, Sao Paulo State University (UNESP), Presidente Prudente, Brazil.
| | - Rafael Luiz-de-Marco
- Post-Graduation Program in Movement Sciences, Sao Paulo State University (UNESP), Presidente Prudente, Brazil; Laboratory of InVestigation in Exercise LIVE, Department of Physical Education, Sao Paulo State University (UNESP), Presidente Prudente, Brazil
| | - Pedro Henrique Narciso
- Laboratory of InVestigation in Exercise LIVE, Department of Physical Education, Sao Paulo State University (UNESP), Presidente Prudente, Brazil
| | | | - Han Kemper
- Amsterdam UMC, Amsterdam Public Health Research Institute, Amsterdam, Netherlands
| | - Ricardo Ribeiro Agostinete
- Post-Graduation Program in Movement Sciences, Sao Paulo State University (UNESP), Presidente Prudente, Brazil; Laboratory of InVestigation in Exercise LIVE, Department of Physical Education, Sao Paulo State University (UNESP), Presidente Prudente, Brazil
| | - Rômulo A Fernandes
- Post-Graduation Program in Movement Sciences, Sao Paulo State University (UNESP), Presidente Prudente, Brazil; Laboratory of InVestigation in Exercise LIVE, Department of Physical Education, Sao Paulo State University (UNESP), Presidente Prudente, Brazil
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Entwistle I, Hume P, Francis P, Hind K. Vertebral Anomalies in Retired Rugby Players and the Impact on Bone Density Calculation of the Lumbar Spine. J Clin Densitom 2021; 24:200-205. [PMID: 33582032 DOI: 10.1016/j.jocd.2021.01.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/25/2020] [Revised: 01/17/2021] [Accepted: 01/20/2021] [Indexed: 10/22/2022]
Abstract
Dual energy X-ray absorptiometry (DXA) lumbar spine bone mineral density (BMD) measurements are subject to artificial elevation in the presence of structural abnormalities that are more common with age and injury, including osteoarthritis, fracture and osteophytes. The aims of this study were to investigate the presence of vertebral abnormalities on DXA scans in retired rugby players and a nonrugby control group, and to explore the effect of vertebral exclusion on the BMD diagnostic outcome. Eigty-seven male retired rugby players and 51 non-rugby controls from the UK Rugby Health Project participated in the study. Lumbar spine, total hip and femoral neck BMD were measured by DXA and scans were analyzed pre and post exclusion of anomalous vertebrae. Data were analyzed by age group to enable application of T-scores (≥50 y) and Z-scores (<50 y). From 138 lumbar spine scans, 66 required adjustment. One hundred twenty-two vertebral exclusions were made, and 12 lumbar spine scans (10 in retired rugby athletes) were un-reportable (<2 evaluable vertebrae). Vertebral exclusion significantly lowered lumbar spine BMD across all groups (p<0.01) and lowered the overall lowest T/Z-score. This effect was more pronounced in rugby groups (age <50 y, p < 0.001; age ≥50 y, p = 0.031) than in the control groups (age <50y, p = 0.125; age ≥50 y, p = 0.250). Vertebral abnormalities detected on lumbar spine scans, were highly prevalent and impacted final the T/Z-score in this cohort of retired rugby players. Current guidelines recommend exclusion of abnormalities from lumbar spine scans in adults aged ≥50 years. Our findings suggest that vertebral exclusions should also be applied to lumbar spine scans performed in those aged <50 years, particularly in former contact sports athletes, given their high risk for vertebral deformity.
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Affiliation(s)
- Ian Entwistle
- Department of Sport and Exercise Sciences, Durham University, United Kingdom.
| | - Patria Hume
- Sports Performance Research Institute New Zealand (SPRINZ), Faculty of Health and Environmental Science, Auckland University of Technology, Auckland, New Zealand
| | - Peter Francis
- Department of Science and Health, Institute of Technology Carlow, Republic of Ireland
| | - Karen Hind
- Department of Sport and Exercise Sciences, Durham University, United Kingdom
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Varley I, Stebbings G, Williams AG, Day S, Hennis P, Scott R, Grazette N, Herbert AJ. An investigation into the association of bone characteristics and body composition with stress fracture in athletes. J Sports Med Phys Fitness 2021; 61:1490-1498. [PMID: 33480513 DOI: 10.23736/s0022-4707.21.11871-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
BACKGROUND The aim of the study was to establish the bone and body composition characteristics of high-level athletes with and without a history of stress fracture injury. METHODS Overall, 279 high-level athletes (212 men, 67 women) (age 28.0±9.2 years; body mass 75.0±17.4 kg; height 1.78±0.10 m) and 112 non-athletic controls (60 women, 52 men) 36.2±15.0 years; 70.9±12.9 kg; 1.71±0.10 m) were assessed by DXA to establish their bone mineral density and content, body fat and lean mass. Athletes completed a questionnaire detailing their stress fracture history. RESULTS There were no differences in whole-body bone mineral density (men 1.41±0.12 g/cm2, women 1.19±0.09 g/cm2), bone mineral content (men 3709±626 g, women 2263±290 g), body fat (men 16.3±5.0%,women 23.0±4.6%) and lean mass (men 65.4±9.9 kg, women 38.7±3.6 kg) between athletes with a history of stress fracture (34 men, 16 women) and those without (176 men, 40 women). CONCLUSIONS DXA derived bone and body composition characteristics were not independent risk factors for stress fracture injury in high-level athletes. This study in a large cohort of high-level athletes provides normative bone and body composition values that can be used as a benchmark for researchers and applied practitioners.
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Affiliation(s)
- Ian Varley
- Department of Sport Science, Nottingham Trent University, Nottingham, UK -
| | - Georgina Stebbings
- Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, UK
| | - Alun G Williams
- Department of Sport and Exercise Sciences, Manchester Metropolitan University, Manchester, UK.,Institute of Sport, Exercise and Health, University College London, London, UK
| | - Stephen Day
- University of Wolverhampton School of Medicine and Clinical Practice, Wolverhampton, UK
| | - Phil Hennis
- Department of Sport Science, Nottingham Trent University, Nottingham, UK
| | - Reece Scott
- Department of Sport Science, Nottingham Trent University, Nottingham, UK
| | - Neval Grazette
- Department of Sport Science, Nottingham Trent University, Nottingham, UK
| | - Adam J Herbert
- Department of Sport and Exercise, Birmingham City University, Birmingham, UK
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6
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Griffin SA, Panagodage Perera NK, Murray A, Hartley C, Fawkner SG, P T Kemp S, Stokes KA, Kelly P. The relationships between rugby union, and health and well-being: a scoping review. Br J Sports Med 2020; 55:319-326. [PMID: 33115706 DOI: 10.1136/bjsports-2020-102085] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/17/2020] [Indexed: 01/01/2023]
Abstract
OBJECTIVE To scope the relationships between rugby union, and health and well-being. DESIGN Scoping review. DATA SOURCES Published and unpublished reports of any age, identified by searching electronic databases, platforms and reference lists. METHODS A three-step search strategy identified relevant published primary, secondary studies and grey literature, which were screened using a priori inclusion criteria. Data were extracted using a standardised tool, to form (1) a numerical analysis and (2) a thematic summary. RESULTS AND DISCUSSION 6658 records were identified, and 198 studies met the inclusion criteria. All forms of rugby union can provide health-enhancing physical activity (PA). 'Non-contact' and wheelchair rugby in particular provide a wide range of physical and mental health and well-being benefits. The evidence is either mixed or unclear in relation to 'contact' rugby union and its effects on a range of physical health domains. Injury and concussion incidence rates are high for contact rugby union relative to other sports. CONCLUSIONS A wide range of stakeholders as well as existing and potential participants can use this information to make a more informed decision about participating in and promoting rugby union as a health-enhancing activity. Industry and policy-makers can use this review to inform policies and strategies that look to increase participation rates and use rugby union as a vehicle to contribute positively to population health. Further research understanding rugby union's contribution to PA as well as to muscle-strengthening and balance is indicated, as well as research examining more health and well-being outcomes across more diverse cohorts.
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Affiliation(s)
- Steffan A Griffin
- Centre for Sport and Exercise, The University of Edinburgh, Edinburgh, UK .,Medical Services, Rugby Football Union, London, UK
| | - Nirmala Kanthi Panagodage Perera
- Centre for Sport, Exercise and Osteoarthritis Research Versus Arthritis, Botnar Research Centre, University of Oxford, Oxford, Oxfordshire, UK.,Sports Medicine, Australian Institute of Sport, Bruce, Australian Capital Territory, Australia
| | - Andrew Murray
- Centre for Sport and Exercise, The University of Edinburgh, Edinburgh, UK.,Scottish Rugby Union, Edinburgh, Scotland, UK
| | | | - Samantha G Fawkner
- The Institute for Sport, Physical Education and Health Sciences, The University of Edinburgh, Edinburgh, UK
| | - Simon P T Kemp
- Medical Services, Rugby Football Union, London, UK.,Faculty of Epidemiology and Public Health, London School of Hygiene & Tropical Medicine, London, UK
| | - Keith A Stokes
- Medical Services, Rugby Football Union, London, UK.,Department for Health, University of Bath, Bath, Somerset, UK
| | - Paul Kelly
- Physical Activity for Health Research Centre, The University of Edinburgh, Edinburgh, UK
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Geeson-Brown T, Jones B, Till K, Chantler S, Deighton K. Body composition differences by age and playing standard in male rugby union and rugby league: A systematic review and meta-analysis. J Sports Sci 2020; 38:2161-2176. [PMID: 32546054 DOI: 10.1080/02640414.2020.1775990] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
This systematic review and meta-analysis aimed to determine differences in body compositionn between playing standard and age in male rugby union and rugby league athletes. The MOOSE (Meta-analysis of Observational Studies in Epidemiology) guidelines for design, implementation, and reporting were followed. Studies were required to be in male rugby union or league and have body composition as the primary or secondary outcome. Data was required to be presented separately for positional groups and body composition presented as whole-body. A systematic search was performed in PubMed, Cochrane Library, MEDLINE, SPORTDiscus, and CINHAHL via EBSCOhost. 57 studies were included for meta-analysis. Results highlighted significantly higher fat-free mass in senior elite than senior sub-elite or junior elite athletes for all RU and RL forwards. Small and non-significant differences were found in fat mass between rugby union playing standards and age categories. Rugby league senior elite forwards had less fat mass than junior elite forwards. Practitioners should prioritise training and nutritional strategies that maximise fat-free mass development, especially in junior elite cohorts.
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Affiliation(s)
- Tom Geeson-Brown
- Carnegie Applied Rugby Research (CARR) Centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University , Leeds, UK.,Leeds Rhinos Rugby League Club , Leeds, UK
| | - Ben Jones
- Carnegie Applied Rugby Research (CARR) Centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University , Leeds, UK.,Leeds Rhinos Rugby League Club , Leeds, UK.,England Performance Unit, The Rugby Football League , Leeds, UK.,School of Science and Technology, University of New England , Armidale, Australia.,Division of Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, The University of Cape Town and the Sports Science Institute of South Africa , Cape Town, South Africa
| | - Kevin Till
- Carnegie Applied Rugby Research (CARR) Centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University , Leeds, UK.,Leeds Rhinos Rugby League Club , Leeds, UK
| | - Sarah Chantler
- Carnegie Applied Rugby Research (CARR) Centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University , Leeds, UK.,Yorkshire Carnegie Rugby Union Club , Leeds, UK
| | - Kevin Deighton
- Carnegie Applied Rugby Research (CARR) Centre, Institute for Sport, Physical Activity and Leisure, Leeds Beckett University , Leeds, UK
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Walker EJ, Aughey RJ, McLaughlin P, McAinch AJ. Seasonal Change in Body Composition and Physique of Team Sport Athletes. J Strength Cond Res 2020; 36:565-572. [PMID: 31972821 DOI: 10.1519/jsc.0000000000003474] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Walker, EJ, Aughey, RJ, McLaughlin, P, and McAinch, AJ. Seasonal change in body composition and physique of team sport athletes. J Strength Cond Res XX(X): 000-000, 2020-Body composition of team sport athletes was measured at 3 points across the preseason and competitive season. This repeated-measures study was conducted in 46 professional Australian football (AF) (age 23.8 ± 3.8 years), 26 soccer (age 22.7 ± 4.7 years), and 33 rugby union players (age 28.1 ± 4.2 years). A mixed-design analysis of variance was used to determine change across the season, and Pearson's correlation was used to determine the relationship between different measures. Anthropometry, dual-energy x-ray absorptiometry (DXA), and 3-dimensional (3D) scan technology were used in AF and soccer, whereas only DXA was used in rugby. Body mass remained unchanged for both AF and soccer with gains in lean mass (p < 0.01), from preseason to early in the competitive season. Skinfold measures declined in AF (p < 0.001) and soccer (p < 0.05) across the season, whereas DXA-measured fat mass only declined in soccer (p < 0.01). Rugby backs (p < 0.01) and forwards (p < 0.001) reduced body fat and gained lean mass from preseason to in-season with forwards having greater relative and absolute changes as measured by DXA. 3D technology did not show change across the season. Dual-energy x-ray absorptiometry body fat percent and the sum of skinfold correlation were large (r = 0.74 [p < 0.001, CI 0.67-0.81]). The greatest change in body composition occurs from the beginning of preseason to the start of competition, with changes returning to baseline levels toward the end of season. Dual-energy x-ray absorptiometry and skinfold measures were moderately correlated, providing a good alternative to track change in subcutaneous fat in AF and soccer athletes.
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Affiliation(s)
- Emily J Walker
- Institute for Health and Sport, Victoria University, Melbourne, Australia
| | - Robert J Aughey
- Institute for Health and Sport, Victoria University, Melbourne, Australia
| | - Patrick McLaughlin
- Institute for Health and Sport, Victoria University, Melbourne, Australia
| | - Andrew J McAinch
- Institute for Health and Sport, Victoria University, Melbourne, Australia.,Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, St. Albans, VIC, Australia
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9
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Alway P, Peirce N, King M, Jardine R, Brooke-Wavell K. Lumbar bone mineral asymmetry in elite cricket fast bowlers. Bone 2019; 127:537-543. [PMID: 31369915 DOI: 10.1016/j.bone.2019.07.030] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2019] [Revised: 07/26/2019] [Accepted: 07/28/2019] [Indexed: 10/26/2022]
Abstract
PURPOSE Bone responds to mechanical loading by increasing bone mineral density (BMD) and/or bone area to enhance bone strength at the site of the greatest strain. Such localised adaptation has not been demonstrated at the spine. The aim of this study is to determine if BMD and/or bone mineral content (BMC) differs between dominant (ipsilateral to bowling/throwing arm) and non-dominant sides of the vertebrae in cricket fast bowlers, and whether this asymmetry differs according to stress fracture or disc injury history. A further aim was to determine if regional BMD and BMC in the lumbar spine differ between fast bowlers, other cricketers, rugby players and non-active controls, to highlight the site-specific response of lumbar vertebra to unilateral activity. METHODS 23 fast bowlers, 14 other cricketers, 22 rugby players and 20 controls underwent an antero-posterior (AP) and lateral DXA scans of their lumbar spine to assess BMD, BMC and area. A custom analysis measured BMD and BMC of the dominant and non-dominant sides (lateral 33%) of the AP lumbar spine. BMD and BMC were compared between groups, injury status, vertebrae and sides using ANOVA. RESULTS Analysis of medical records showed that 6 fast bowlers had a history of lumbar stress fracture. Significantly greater BMD and BMC was found in the L4 non-dominant vertebra compared with the dominant vertebra in fast bowlers. BMD and BMC differed significantly according to vertebra, side and group, with fast bowlers having significantly greater BMD and BMC at the L3 and L4 non-dominant vertebra compared with other groups (L3: 13.3%-45.3%, L4: 15.7%-44.0%) compared with other groups. Fast bowlers who never suffered lumbar stress fracture had 3.6% and 1.7% greater BMD in the dominant and non-dominant sides of lumbar vertebrae respectively compared with those who did suffer lumbar stress fracture, but evidence of this was weaker (P = 0.08). CONCLUSION The lumbar spine responds to a unique unilateral high loading activity through site-specific increased bone mass at the site of most strain. Fast bowlers had increased lumbar BMD, particularly on the non-dominant side of L4, although this adaptation was less marked in those with history of lumbar stress fracture. Site-specific low bone mineral density within the lumbar side may be implicated in the aetiology of lumbar stress fracture.
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Affiliation(s)
- Peter Alway
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK.
| | - Nicholas Peirce
- Department of Science and Medicine, England and Wales Cricket Board, Loughborough LE11 3TU, UK; National Centre for Sports and Exercise Medicine, Loughborough University, Loughborough LE11 3TU, UK.
| | - Mark King
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK.
| | - Robert Jardine
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK
| | - Katherine Brooke-Wavell
- School of Sport, Exercise and Health Sciences, Loughborough University, Loughborough LE11 3TU, UK.
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10
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Adults Engaged in Sports in Early Life Have Higher Bone Mass Than Their Inactive Peers. J Phys Act Health 2018; 15:516-522. [DOI: 10.1123/jpah.2017-0366] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Purpose: To analyze the relationship between engagement in sports in early life and bone variables among adults of both sexes. Methods: The sample was composed of 225 men and women. Demographic data were collected, and dual-energy X-ray absorptiometry was used to assess bone mineral density, bone mineral content, and lean soft tissue. Sports participation in early life was assessed by an interview including childhood and adolescence. Consumption of tobacco and alcohol was also assessed by interview and the habitual physical activity level by a pedometer. Results: Inactive men had bone mineral content around 11% lower than active men in childhood or adolescence, whereas for women, this difference represented around 14%. Active men had 74% less fat mass than inactive men in early life, and the difference was 67% for women. Early sports participation explained the differences in whole-body bone mineral content (16.8%, P-value = .005) and bone mineral density (8.8%, P-value = .015), as well as bone mineral density in lower limbs (18.9%, P-value = .001) among women. Conclusion: Adults engaged in sports in early life have higher bone mass than their inactive peers, especially women.
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Impact of Martial Arts (Judo, Karate, and Kung Fu) on Bone Mineral Density Gains in Adolescents of Both Genders: 9-Month Follow-Up. Pediatr Exerc Sci 2017; 29:496-503. [PMID: 28714773 DOI: 10.1123/pes.2017-0019] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
PURPOSE To compare bone mineral density (BMD) gains in adolescents of both genders stratified according to different martial art styles in a 9-month follow-up study. METHODS The longitudinal study consisted of 29 adolescents of both genders and age between 11 and 17 years stratified into a control group (not engaged in any sport) and 50 fighters (kung fu/karate, n = 29; judo, n = 21). All 79 subjects underwent anthropometric measures (weight, height, leg length, and height set) and dual-energy X-ray absorptiometry (BMD, in g/cm2) at 2 moments, baseline and 9 months later. Maturity offset (age at peak height velocity), lean soft tissue, chronological age, and resistance training were treated as covariates. RESULTS Male judoists presented higher gains in BMD-spine [0.098 g/cm2 (95% confidence interval, 0.068-0.128)] than control group [0.040 g/cm2 (95% confidence interval, 0.011-0.069)] (post hoc test with P = .030). There was no effect of martial art on BMD gains among girls. Independently of gender, in all multivariate models, lean soft tissue constituted the most relevant covariate. CONCLUSIONS Judo practice in adolescents affected the bone accrual significantly after 9-month follow-up compared with controls, mainly in boys.
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Agostinete RR, Ito IH, Kemper H, Pastre CM, Rodrigues-Júnior MA, Luiz-de-Marco R, Fernandes RA. Somatic maturation and the relationship between bone mineral variables and types of sports among adolescents: cross-sectional study. SAO PAULO MED J 2017; 135:253-259. [PMID: 28746660 PMCID: PMC10019843 DOI: 10.1590/1516-3180.2016.0270210217] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2017] [Accepted: 02/21/2017] [Indexed: 12/22/2022] Open
Abstract
CONTEXT AND OBJECTIVE: Peak height velocity (PHV) is an important maturational event during adolescence that affects skeleton size. The objective here was to compare bone variables in adolescents who practiced different types of sports, and to identify whether differences in bone variables attributed to sports practice were dependent on somatic maturation status. DESIGN AND SETTING: Cross-sectional study, São Paulo State University (UNESP). METHODS: The study was composed of 93 adolescents (12 to 16.5 years old), divided into three groups: no-sport group (n = 42), soccer/basketball group (n = 26) and swimming group (n = 25). Bone mineral density and content were measured using dual-energy x-ray absorptiometry and somatic maturation was estimated through using peak height velocity. Data on training load were provided by the coaches. RESULTS: Adolescents whose PHV occurred at an older age presented higher bone mineral density in their upper limbs (P = 0.018). After adjustments for confounders, such as somatic maturation, the swimmers presented lower values for bone mineral density in their lower limbs, spine and whole body. Only the bone mineral density in the upper limbs was similar between the groups. There was a negative relationship between whole-body bone mineral content and the weekly training hours (β: -1563.967; 95% confidence interval, CI: -2916.484 to -211.450). CONCLUSION: The differences in bone variables attributed to sport practice occurred independently of maturation, while high training load in situations of hypogravity seemed to be related to lower bone mass in swimmers.
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Affiliation(s)
- Ricardo Ribeiro Agostinete
- MSc. Postgraduate Student, Postgraduate Program on Physical Therapy, Laboratory for Exercise Investigation (LIVE), Department of Physical Education, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
| | - Igor Hideki Ito
- MSc. Postgraduate Student, Postgraduate Program on Kinesiology, Laboratory for Exercise Investigation (LIVE), Department of Physical Education, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
| | - Han Kemper
- PhD. Emeritus Professor, Department of Occupational Health, EMGO+ Institute for Health and Care Research, VU University Medical Center, Amsterdam, Netherlands.
| | - Carlos Marcelo Pastre
- PhD. Associate Professor, Department of Physical Therapy, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
| | - Mário Antônio Rodrigues-Júnior
- MSc. Postgraduate Student, Postgraduate Program on Kinesiology, Laboratory for Exercise Investigation (LIVE), Department of Physical Education, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
| | - Rafael Luiz-de-Marco
- MSc. Postgraduate Student, Laboratory for Exercise Investigation (LIVE), Department of Physical Education, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
| | - Rômulo Araújo Fernandes
- PhD. Assistant Professor, Laboratory for Exercise Investigation (LIVE), Department of Physical Education, Universidade Estadual Paulista (UNESP), Presidente Prudente (SP), Brazil.
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Mantovani AM, Lima MCS, Agostinete RR, Ito IH, Codogno JS, Lynch KR, Fernandes RA. Sports Practice and Bone Mass in Prepubertal Adolescents and Young Adults: A Cross-sectional Analysis. MOTRIZ: REVISTA DE EDUCACAO FISICA 2016. [DOI: 10.1590/s1980-6574201600040018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Affiliation(s)
- Alessandra Madia Mantovani
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | | | - Ricardo Ribeiro Agostinete
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | - Igor Hideki Ito
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | - Jamile Sanches Codogno
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | - Kyle Robinson Lynch
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
| | - Rômulo Araújo Fernandes
- Laboratory of InVestigation in Exercise – LIVE; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil; Universidade Estadual Paulista Júlio de Mesquita Filho, Brasil
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Lösch S, Moghaddam N, Grossschmidt K, Risser DU, Kanz F. Stable isotope and trace element studies on gladiators and contemporary Romans from Ephesus (Turkey, 2nd and 3rd Ct. AD)--mplications for differences in diet. PLoS One 2014; 9:e110489. [PMID: 25333366 PMCID: PMC4198250 DOI: 10.1371/journal.pone.0110489] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/16/2014] [Indexed: 12/02/2022] Open
Abstract
The gladiator cemetery discovered in Ephesus (Turkey) in 1993 dates to the 2nd and 3rd century AD. The aim of this study is to reconstruct diverse diet, social stratification, and migration of the inhabitants of Roman Ephesus and the distinct group of gladiators. Stable carbon, nitrogen, and sulphur isotope analysis were applied, and inorganic bone elements (strontium, calcium) were determined. In total, 53 individuals, including 22 gladiators, were analysed. All individuals consumed C3 plants like wheat and barley as staple food. A few individuals show indication of consumption of C4 plants. The δ13C values of one female from the gladiator cemetery and one gladiator differ from all other individuals. Their δ34S values indicate that they probably migrated from another geographical region or consumed different foods. The δ15N values are relatively low in comparison to other sites from Roman times. A probable cause for the depletion of 15N in Ephesus could be the frequent consumption of legumes. The Sr/Ca-ratios of the gladiators were significantly higher than the values of the contemporary Roman inhabitants. Since the Sr/Ca-ratio reflects the main Ca-supplier in the diet, the elevated values of the gladiators might suggest a frequent use of a plant ash beverage, as mentioned in ancient texts.
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Affiliation(s)
- Sandra Lösch
- Department of Physical Anthropology, Institute of Forensic Medicine, University of Bern, Bern, Switzerland
| | - Negahnaz Moghaddam
- Department of Physical Anthropology, Institute of Forensic Medicine, University of Bern, Bern, Switzerland
| | - Karl Grossschmidt
- Center of Anatomy and Cell Biology, Medical University of Vienna, Vienna, Austria
| | - Daniele U. Risser
- Department of Forensic Medicine, Medical University of Vienna, Vienna, Austria
| | - Fabian Kanz
- Department of Forensic Medicine, Medical University of Vienna, Vienna, Austria
- * E-mail:
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Hind K, Birrell F, Beck B. Prevalent morphometric vertebral fractures in professional male rugby players. PLoS One 2014; 9:e97427. [PMID: 24846310 PMCID: PMC4028209 DOI: 10.1371/journal.pone.0097427] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2014] [Accepted: 04/20/2014] [Indexed: 11/30/2022] Open
Abstract
There is an ongoing concern about the risk of injury to the spine in professional rugby players. The objective of this study was to investigate the prevalence of vertebral fracture using vertebral fracture assessment (VFA) dual energy X-ray absorptiometry (DXA) imaging in professional male rugby players. Ninety five professional rugby league (n = 52) and union (n = 43) players (n = 95; age 25.9 (SD 4.3) years; BMI: 29.5 (SD 2.9) kg.m2) participated in the research. Each participant received one VFA, and one total body and lumbar spine DXA scan (GE Lunar iDXA). One hundred and twenty vertebral fractures were identified in over half of the sample by VFA. Seventy four were graded mild (grade 1), 40 moderate (grade 2) and 6 severe (grade 3). Multiple vertebral fractures (≥2) were found in 37 players (39%). There were no differences in prevalence between codes, or between forwards and backs (both 1.2 v 1.4; p>0.05). The most common sites of fracture were T8 (n = 23), T9 (n = 18) and T10 (n = 21). The mean (SD) lumbar spine bone mineral density Z-score was 2.7 (1.3) indicating high player bone mass in comparison with age- and sex-matched norms. We observed a high number of vertebral fractures using DXA VFA in professional rugby players of both codes. The incidence, aetiology and consequences of vertebral fractures in professional rugby players are unclear, and warrant timely, prospective investigation.
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Affiliation(s)
- Karen Hind
- Carnegie Research Institute, Leeds Metropolitan University, Leeds, West Yorkshire, United Kingdom
| | - Fraser Birrell
- Institute of Cellular Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
| | - Belinda Beck
- School of Rehabilitation Sciences, Griffith University, Gold Coast, Australia
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Galliera E, Dogliotti G, Melegati G, Corsi Romanelli MM, Cabitza P, Banfi G. Bone remodelling biomarkers after whole body cryotherapy (WBC) in elite rugby players. Injury 2013; 44:1117-21. [PMID: 23000054 DOI: 10.1016/j.injury.2012.08.057] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 08/29/2012] [Indexed: 02/02/2023]
Abstract
Whole body cryotherapy (WBC) consists of a brief exposure to extreme cold air (-110°C) in a controlled chamber and it is applied in sports medicine to improve recovery from musculoskeletal trauma. The aim of this study is to better define the beneficial effect of WCB on the musculoskeletal system of athletes, in particular on bone remodelling. Remodelling osteoimmunological biomarkers OPG, RANKL and RANK were measured after WBC treatment in 10 male rugby players randomly selected from the Italian National team. OPG levels were increased significantly, supporting the view that WBC induces an osteogenic effect. Further studies evaluating the effect of WBC on bone metabolism are desirable.
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Affiliation(s)
- Emanuela Galliera
- Dipartimento di Morfologia Umana e Scienze Biomediche - Città Studi, Università degli Studi di Milano, Milan, Italy.
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Nasri R, Hassen Zrour S, Rebai H, Fadhel Najjar M, Neffeti F, Bergaoui N, Mejdoub H, Tabka Z. Grip strength is a predictor of bone mineral density among adolescent combat sport athletes. J Clin Densitom 2013; 16:92-7. [PMID: 22980488 DOI: 10.1016/j.jocd.2012.07.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 07/23/2012] [Accepted: 07/25/2012] [Indexed: 11/24/2022]
Abstract
The aim of this study was firstly to investigate the correlation between bone parameters and grip strength (GS) in hands, explosive legs power (ELP), and hormonal parameters; second, to identify the most determinant variables of bone mineral density (BMD) among adolescent combat sport athletes. Fifty combat sport athletes aged 17.1 ± 0.2 year were compared with 30 sedentary subjects matched for age, height, and pubertal stage. For all subjects, the BMD in deferent sites associated with anthropometric parameters were measured by dual-energy X-ray absorptiometry. The growth hormone (GH) and testosterone (TESTO) concentrations were tested. The GS in dominant (GSDA) and nondominant arms (GSNDA) and ELP were evaluated. All BMD measured were greater in athletes than in sedentary group (p<0.01). The GS and ELP showed higher values in athletes than in sedentary group (p<0.01). The BMD in all sites were correlated with weight, but without correlation with height. The GSNDA and ELP were significantly correlated with BMD of both spine and legs. The GH was correlated with the BMD of whole body and spine (p<0.05). The TESTO was only correlated with BMD of the arms (p<0.01). The best predictor of BMD measurements is GSNDA. This study has proved the osteogenic effect of combat sports practice, especially judo and karate kyokushinkai. Therefore, children and adolescent should be encouraged to participate in combat sport. Moreover, it suggested that the best model predicting BMD in different sites among adolescent combat sports athletes was the GSNDA.
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Affiliation(s)
- Raouf Nasri
- Laboratory of Physiology and Functional Explorations, Faculty of Medicine, Sousse, Tunisia.
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Dolan E, Crabtree N, McGoldrick A, Ashley DT, McCaffrey N, Warrington GD. Weight regulation and bone mass: a comparison between professional jockeys, elite amateur boxers, and age, gender and BMI matched controls. J Bone Miner Metab 2012; 30:164-70. [PMID: 21773703 DOI: 10.1007/s00774-011-0297-1] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 06/20/2011] [Indexed: 11/28/2022]
Abstract
The aim of this study was to compare bone mass between two groups of jockeys (flat: n = 14; national hunt: n = 16); boxers (n = 14) and age, gender and BMI matched controls (n = 14). All subjects underwent dual energy X-ray absorptiometry (DXA) scanning for assessment of bone mass, with measurements made of the total body, vertebra L2-4 and femoral neck. Body composition and the relative contribution of fat and lean mass were extrapolated from the results. Data were analysed in accordance with differences in body composition, in particular, height, lean mass, fat mass and age. Both jockey groups were shown to display lower bone mass than either the boxers or control group at a number of sites including total body bone mineral density (BMD) (1.019 ± 0.06 and 1.17 ± 1.05 vs. 1.26 ± 0.01 and 1.26 ± 0.06 g cm(-2) for flat, national hunt, boxer and control, respectively), total body bone mineral content (BMC) less head, L2-4 BMD and femoral neck BMD and BMC (p < 0.05). Regression analysis revealed that lean mass and height were the primary predictors of total body BMC, although additional group-specific influences were present which reduced bone mass in the flat jockey group and enhanced it in the boxers (R (2) = 0.814). Reduced bone mass in jockeys may be a consequence of reduced energy availability in response to chronic weight restriction and could have particular implications for these athletes in light of the high risk nature of the sport. In contrast, the high intensity, high impact training associated with boxing may have conveyed an osteogenic stimulus on these athletes.
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Affiliation(s)
- Eimear Dolan
- School of Health and Human Performance, Dublin City University, Glasnevin, Dublin 9, Ireland.
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Micklesfield LK, Gray J, Taliep MS. Bone mineral density and body composition of South African cricketers. J Bone Miner Metab 2012; 30:232-7. [PMID: 21947734 DOI: 10.1007/s00774-011-0310-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2011] [Accepted: 08/11/2011] [Indexed: 11/24/2022]
Abstract
Mechanical loading associated with weight-bearing physical activity has been positively associated with bone mineral density in athletes participating in various sports. The aim of this study was to compare the body composition and bone mineral density of South African male cricketers to controls. Whole body (WB), femoral neck (FN), proximal femur (PF) and lumbar spine (LS) BMD, as well as whole body fat mass (WBFM) and lean mass (WBLM) were measured, using dual-energy X-ray absorptiometry (DXA), on 34 high-performance (senior provincial and national level) cricketers and 23 physically active controls between the ages of 16 and 34 years. Cricketers were significantly younger, taller, and had greater WBLM and WBBMC compared to the controls. LS, PF and FN BMD were higher in the cricketers and controls before and after adjusting for age and height. WBBMD was significantly lower in the spin bowlers compared to the batsmen and fast bowlers, after adjusting for age and height; however, there were no differences at the BMD sites between the groups. Bone mineral density at the lumbar spine and hip sites was significantly greater in the cricketers compared to the controls, suggesting that the mechanical loading associated with cricket is beneficial for bone mineral density.
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Affiliation(s)
- Lisa K Micklesfield
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, Faculty of Health Sciences, University of Cape Town, Private Bag, Rondebosch, 7700, South Africa.
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Georgeson EC, Weeks BK, McLellan C, Beck BR. Seasonal change in bone, muscle and fat in professional rugby league players and its relationship to injury: a cohort study. BMJ Open 2012; 2:bmjopen-2012-001400. [PMID: 23135539 PMCID: PMC3532969 DOI: 10.1136/bmjopen-2012-001400] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/03/2022] Open
Abstract
OBJECTIVES To examine the anthropometric characteristics of an Australian National Rugby League team and identify the relationship to type and incidence of injuries sustained during a professional season. It was hypothesised that body composition would not change discernibly across a season and that injury would be negatively related to preseason bone and muscle mass. DESIGN A repeated measure, prospective, observational, cohort study. SETTING Griffith University, Gold Coast, Australia. PARTICIPANTS 37 professional male Australian National Rugby League players, 24.3 (3.8) years of age were recruited for preseason 1 testing, of whom 25 were retested preseason 2. PRIMARY AND SECONDARY OUTCOME MEASURES Primary outcome measures included biometrics; body composition (bone, muscle and fat mass; dual-energy x-ray absorptiometry; XR800, Norland Medical Systems, Inc); bone geometry and strength (peripheral quantitative CT; XCT 3000, Stratec); calcaneal broadband ultrasound attenuation (BUA; QUS-2, Quidel); diet and physical activity history. Secondary outcome measures included player injuries across a single playing season. RESULTS Lean mass decreased progressively throughout the season (pre=81.45(7.76) kg; post=79.89(6.72) kg; p≤0.05), while whole body (WB) bone mineral density (BMD) increased until mid-season (pre=1.235(0.087) g/cm(2); mid=1.296(0.093) g/cm(2); p≤0.001) then decreased thereafter (post=1.256(0.100); p≤0.001). Start-of-season WB BMD, fat and lean mass, weight and tibial mass measured at the 38% site predicted bone injury incidence, but no other relationship was observed between body composition and injury. CONCLUSIONS Significant anthropometric changes were observed in players across a professional rugby league season, including an overall loss of muscle and an initial increase, followed by a decrease in bone mass. Strong relationships between anthropometry and incidence of injury were not observed. Long-term tracking of large rugby league cohorts is indicated to obtain more injury data in order to examine anthropometric relationships with greater statistical power.
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Affiliation(s)
- Erin C Georgeson
- Centre for Musculoskeletal Research, School of Rehabilitation Sciences, Griffith Health Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Benjamin K Weeks
- Centre for Musculoskeletal Research, School of Rehabilitation Sciences, Griffith Health Institute, Griffith University, Gold Coast, Queensland, Australia
| | - Chris McLellan
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Belinda R Beck
- Centre for Musculoskeletal Research, School of Rehabilitation Sciences, Griffith Health Institute, Griffith University, Gold Coast, Queensland, Australia
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Bréban S, Chappard C, Jaffré C, Benhamou C. Hypoleptinaemia in extreme body mass models: The case of international rugby players. J Sci Med Sport 2010; 13:479-84. [DOI: 10.1016/j.jsams.2009.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2009] [Revised: 11/17/2009] [Accepted: 11/23/2009] [Indexed: 11/15/2022]
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