The Adibox Study: Adiposity and Bone Metabolism: Effects of Exercise-induced Weight Loss in Adolescents with Obesity

Thesis


Chaplais, Elodie. (2017) The Adibox Study: Adiposity and Bone Metabolism: Effects of Exercise-induced Weight Loss in Adolescents with Obesity [Thesis]. https://doi.org/10.4226/66/5b0b7d59c8772
AuthorsChaplais, Elodie
Qualification nameDoctor of Philosophy (PhD)
Abstract

Introduction: This program of research targeted the impact of an 8-month weight loss intervention induced by physical activity and nutrition on bone health in adolescents with obesity. The overall aim of this thesis was to examine the impact of a lifestyle weight loss intervention on the bone parameters in adolescents with obesity.

Method: Sixty-five adolescents were recruited: 31 (6 males) adolescents with obesity in the weight loss intervention (age: 13.61 (1.27)), 23 normal weight (NW) adolescents (age: 15.90 (0.43)) and 11 (4 males) adolescents with obesity in another control group (14.02 (1.39)). Primary outcomes targeted bone densitometry (whole body, spine, hip DXA). Secondary outcomes included body composition, bone geometry and strength (hip structural analysis) and bone biomarkers (procollagen type 1 N-terminal propeptide (P1NP), C telopeptide (CTx) estradiol, leptin). Data were collected at baseline, 4 months and 8 months. Data were adjusted for body weight, fat mass and lean mass changes.

Results: Compared with the NW controls, adolescents with obesity displayed lower unadjusted and adjusted bone density. Following successful weight loss (~ -11%) adolescents with obesity increased whole body (%Ob Δ 3.22 (3.58) pp<0.001) and lumbar spine (%Ob Δ 6.27 (12.45) p=0.014) BMD. However, values remain lower than their NW peers after adjustment to body weight changes. After the weight loss intervention, compromised estimates of fracture risk remained especially at the narrow neck (buckling ratio (BR) 8.25 (2.00) p=0.005), despite positive adaptations of some geometric properties (i.e. NN CSA, NN Z). Also, bone accretion changes in adolescents with obesity followed an androgen-like adaptation demonstrated by periosteal expansion (% NW Δ 0.69 (3.71); Ob Δ 1.67 (9.11)) and endocortical resorption (% NW Δ -2.11 (11.79); Ob Δ 4.42 (10.56)). Among the intervention group, differences in bone markers favoured formation during the first 4 months and favoured resorption in the remaining months.

Conclusion: Bone fragility in adolescents with obesity was demonstrated by (1) baseline and post intervention lower whole body and regional BMD than NW controls, (2) post-intervention higher fracture risk index at the narrow neck, (3) bone biomarkers showing reduced z-scores, uncoupling indices and qualitative representations of the distribution of bone remodeling. Future investigations of links between bone and obesity during adolescence can be well informed by the results of this thesis.

KeywordsBone health; bone density; periosteal expansion; endocortical resorption
Year2017
PublisherACU Research Bank
Digital Object Identifier (DOI)https://doi.org/10.4226/66/5b0b7d59c8772
Research GroupSports Performance, Recovery, Injury and New Technologies (SPRINT) Research Centre
Final version
Publication dates01 Aug 2017
Permalink -

https://acuresearchbank.acu.edu.au/item/87681/the-adibox-study-adiposity-and-bone-metabolism-effects-of-exercise-induced-weight-loss-in-adolescents-with-obesity

Download files

  • 2
    total views
  • 1
    total downloads
  • 2
    views this month
  • 1
    downloads this month
These values are for the period from 19th October 2020, when this repository was created.

Export as

Related outputs

Effects of a short residential thermal spa program to prevent work-related stress/burnout on stress biomarkers: The thermstress proof of concept study
Dutheil, Frederic, Chaplais, Elodie, Vilmant, Audrey, Lanoir, Denise, Courteix, Daniel, Duche, Pascale, Abergel, Armand, Pfabigan, Daniela M., Han, Shihui, Mondillon, Laurie, Vallet, Guillaume, Mermillod, Martial, Boudet, Gil, Obert, Phillippe, Izem, Omar, Boirie, Yves, Pereira, Bruno and Lesage, Francois-Xavier. (2019) Effects of a short residential thermal spa program to prevent work-related stress/burnout on stress biomarkers: The thermstress proof of concept study. Journal of International Medical Research. 47(10), pp. 5130 - 5145. https://doi.org/10.1177/0300060519859119
Geometric and mechanical bone response to a multidisciplinary weight loss intervention in adolescents with obesity: The ADIBOX Study
Chaplais, Elodie, Naughton, Geraldine, Dutheil, Frederic, Masurier, Julie, Greene, David, Pereira, Bruno, Duclos, Martine, Thivel, David and Courteix, Daniel. (2018) Geometric and mechanical bone response to a multidisciplinary weight loss intervention in adolescents with obesity: The ADIBOX Study. Journal of Clinical Densitometry. 23(2), pp. 254 - 263. https://doi.org/10.1016/j.jocd.2018.06.002
Bioelectrical impedance is an accurate method to assess body composition in obese but not severely obese adolescents
Verney, Julien, Metz, Lore, Chaplais, Elodie, Cardenoux, Charlotte, Pereira, Bruno and Thivel, David. (2016) Bioelectrical impedance is an accurate method to assess body composition in obese but not severely obese adolescents. Nutrition Research. 36(7), pp. 663 - 670. https://doi.org/10.1016/j.nutres.2016.04.003
Cross-sectional and longitudinal study protocols of the 'ADIposity and BOne metabolism: Effects of eXercise-induced weight loss in obese adolescents' (ADIBOX) project
Chaplais, Elodie, Dutheil, Frederic, Naughton, Geraldine Ann, Greene, David Anthony, Pereira, Bruno, Thivel, David and Courteix, Daniel. (2016) Cross-sectional and longitudinal study protocols of the 'ADIposity and BOne metabolism: Effects of eXercise-induced weight loss in obese adolescents' (ADIBOX) project. BMJ Open. 6, pp. 1 - 9. https://doi.org/10.1136/bmjopen-2016-011407
Bone-adiposity cross-talk: implications for pediatric obesity
Chaplais, Elodie, Thivel, David, Greene, David, Dutheil, Frederic, Duche, Pascale, Naughton, Geraldine and Courteix, Daniel. (2015) Bone-adiposity cross-talk: implications for pediatric obesity. Journal of Bone and Mineral Metabolism. 33(6), pp. 592 - 602. https://doi.org/10.1007/s00774-015-0654-6
Smartphone interventions for weight treatment and behavioral change in pediatric obesity : A systematic review
Chaplais, Elodie, Naughton, Geraldine, Thivel, David, Courteix, Daniel and Greene, David. (2015) Smartphone interventions for weight treatment and behavioral change in pediatric obesity : A systematic review. Telemedicine and e-Health (print). 21(10), pp. 822 - 830. https://doi.org/10.1089/tmj.2014.0197
Reproducibility of a peripheral quantitative computed tomography scan protocol to measure the material properties of the second metatarsal
Chaplais, Elodie, Greene, David, Hood, Anita, Telfer, Scott, du Toit, Verona, Singh-Grewal, Davinder, Burns, Joshua, Rome, Keith, Schiferl, Daniel and Hendry, Gordon. (2014) Reproducibility of a peripheral quantitative computed tomography scan protocol to measure the material properties of the second metatarsal. BMC Musculoskeletal Disorders. 15(242), pp. 1 - 6. https://doi.org/10.1186/1471-2474-15-242