A Single Bout of Resistance Training Improves State Body Image in Male Weight-Trainers

Autor(en): Waldorf, Manuel 
Erkens, Nele
Vocks, Silja 
McCreary, Donald R.
Cordes, Martin
Stichwörter: ADOLESCENT BOYS; body image states; DRIVE; drive for muscularity; exercise; EXERCISE INTENSITY; HEART-RATE; Hospitality, Leisure, Sport & Tourism; MASS INDEX; MUSCLE DYSMORPHIA; MUSCULARITY; Psychology; Psychology, Applied; resistance training; SESSION; Social Sciences - Other Topics; STATISTICAL POWER; VISUAL-ATTENTION
Erscheinungsdatum: 2017
Volumen: 6
Ausgabe: 1
Startseite: 53
Seitenende: 69
Although improvements in body image have been shown for longer-lasting resistance training, research on its short-term effects is currently lacking. The present study set out to test a hypothesized beneficial effect of a single bout of resistance training on global and specific (i. e., body fat-and muscularity-related) body image states of male exercisers. Additionally, a moderating effect of drive for muscularity was explored. In a controlled crossover study, 42 experienced weight trainers received (a) a session of resistance training; (b) a session of aerobic exercise (cycling); and (c) a session of magazine reading. Body image states were assessed before and immediately after each condition, and after 24 hr. As hypothesized, resistance training, but not cycling or reading, led to a significant increase in perceived muscularity on a silhouette measure of body image states (g = 0.31 or 3 kg). Both exercise conditions led to a significant decrease in perceived body fat (g = -0.33 or -2.5% for resistance training), but for resistance training, this only held true for men lower in drive for muscularity (g =.58, p <.01). After 24 hr, scores had returned to baseline levels. Even a single bout of resistance training yields short-term improvements in men's body image states on both the muscularity and fat dimension, which may act as a reinforcer of exercise behavior. The present findings might foster the understanding of body-image factors that contribute to the development of excessive weight-lifting behavior.
ISSN: 21573905
DOI: 10.1037/spy0000076

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