ðə vˌɪzᵻbˈɪlᵻɾi ʌvðə bˈɛlt ɪz kˈɔːzd baɪ ɐ lˈoʊ bˈɑːdi fˈæt pɚsˈɛntɪdʒ, ɹˈæðɚ ðɐn ðə kɹiːˈeɪʃən ʌv nˈuː mˈʌsəl.
The visibility of the belt is caused by a low body fat percentage, rather than the creation of new muscle.