Muscle Dysmorphia Symptomatology and Associated Psychological Features in Bodybuilders and Non-Bodybuilder Resistance Trainers: A Systematic Review and Meta-Analysis

Lachlan Mitchell; Stuart B. Murray; Stephen Cobley; Daniel Hackett; Janelle Gifford; Louise Capling; Helen O'Connor

doi:10.1007/s40279-016-0564-3

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Muscle Dysmorphia Symptomatology and Associated Psychological Features in Bodybuilders and Non-Bodybuilder Resistance Trainers: A Systematic Review and Meta-Analysis

Journal article

Peer reviewed

Muscle Dysmorphia Symptomatology and Associated Psychological Features in Bodybuilders and Non-Bodybuilder Resistance Trainers: A Systematic Review and Meta-Analysis

Lachlan Mitchell, Stuart B. Murray, Stephen Cobley, Daniel Hackett, Janelle Gifford, Louise Capling and Helen O'Connor

Sports Medicine, Vol.47(2), pp.233-259

2017

DOI: https://doi.org/10.1007/s40279-016-0564-3

PMID: 27245060

Abstract

muscle dysmorphia

resistance training

diet

physical activity

Anorexia Nervosa

psychological feature

pool effect size

exercise dependene

Background Muscle dysmorphia (MD) is associated with a self-perceived lack of size and muscularity, and is characterized by a preoccupation with and pursuit of a hyper-mesomorphic body. MD symptoms may hypothetically be more prevalent in bodybuilders (BBs) than in non-bodybuilder resistance trainers (NBBRTs). Objective Our objective was to compare MD symptomatology in BBs versus NBBRTs and identify psychological and other characteristics associated with MD in these groups. Methods We searched relevant databases from earliest record to February 2015 for studies examining MD symptoms in BBs and/or NBBRTs. Included studies needed to assess MD using a psychometrically validated assessment tool. Study quality was evaluated using an adapted version of the validated Downs and Black tool. We calculated between-group standardized mean difference (effect sizes [ESs]) and 95 % confidence intervals (CIs) for each MD subscale, and performed meta-analysis when five or more studies used the same MD tool. We also extracted data describing psychological or other characteristics associated with MD. Results Of the 2135 studies initially identified, 31 analyzing data on 5880 participants (BBs: n = 1895, NBBRTs: n = 3523, controls: n = 462) were eligible for inclusion, though study quality was generally poor–moderate (range 7–19/22). Most participants were male (90 %). Eight different MD assessment tools were used. Meta-analysis for five studies all using the Muscle Dysmorphia Inventory (MDI) revealed there was a medium to large pooled ES for greater MD symptomatology in BBs than in NBBRTs on all MDI subscales (ES 0.53–1.12; p ≤ 0.01). Competitive BBs scored higher than non-competitive BBs (ES 1.21, 95 % CI 0.82–1.60; p < 0.001). MD symptoms were associated with anxiety (r 0.32–0.42; p ≤ 0.01), social physique anxiety (r 0.26–0.75; p < 0.01), depression (r 0.23–0.53; p ≤ 0.01), neuroticism (r 0.38; p < 0.001), and perfectionism (r 0.35; p < 0.05) and were inversely associated with self-concept (r –0.32 to –0.36; p < 0.01) and self-esteem (r –0.42 to –0.47; p < 0.01). Conclusions MD symptomatology was greater in BBs than in NBBRTs. Anxiety and social physique anxiety, depression, neuroticism, and perfectionism were positively associated with MD, while self-concept and self-esteem were negatively associated. It remains unclear whether these characteristics are exacerbated by bodybuilding, or whether individuals with these characteristics are attracted to the bodybuilding context.

Details

Title: Muscle Dysmorphia Symptomatology and Associated Psychological Features in Bodybuilders and Non-Bodybuilder Resistance Trainers: A Systematic Review and Meta-Analysis
Authors: Lachlan Mitchell (Corresponding Author) - University of Sydney
Stuart B. Murray (Author) - University of California, San Francisco
Stephen Cobley (Author) - University of Sydney
Daniel Hackett (Author) - University of Sydney
Janelle Gifford (Author) - University of Sydney
Louise Capling (Author) - University of Sydney
Helen O'Connor (Author) - University of Sydney
Publication details: Sports Medicine, Vol.47(2), pp.233-259
Publisher: Adis International Ltd.
Date published: 2017
DOI: 10.1007/s40279-016-0564-3
ISSN: 1179-2035
PMID: 27245060
Grant note: The authors would like to acknowledge funding support of Sports Dietitians Australia, which assisted in the preparation of this manuscript.
Organisation Unit: School of Health - Nutrition & Dietetics
Language: English
Record Identifier: 991113252102621
Output Type: Journal article