Crunch dduyiro wa lubuto amanyiddwa ennyo ng’atunuulira ebinywa ebikulu okusinga rectus abdominis, okuyamba okulongoosa enyimirira, bbalansi n’amaanyi g’omubiri okutwalira awamu. Esaanira abantu ssekinnoomu ku mitendera gyonna egya fitness, okuva ku batandisi okutuuka ku bannabyamizannyo ab’omulembe, olw’amaanyi gaayo agakyusibwakyusibwa. Abantu bandyagadde okukola dduyiro ono kuba ayamba okutuuka ku toned midsection, okutumbula omutindo gw’emizannyo, era awagira emirimu gy’omubiri egya buli lunaku.
Yee, abatandisi basobola ddala okukola dduyiro wa Crunch. Dduyiro w’olubuto omukulu agenderera ebinywa by’olubuto okusinga rectus abdominis. Wabula kikulu okuyiga akakodyo akatuufu okwewala obuvune n’okulinnyisa ebivaamu. Abatandisi balina okutandika mpola, nga baddiŋŋana katono, era nga beeyongera mpolampola ng’amaanyi gaabwe n’okugumiikiriza bigenda bitereera. Singa owulira obuzibu oba obulumi bwonna, kikulu okukomya dduyiro ono n’okwebuuza ku mukugu mu by’okukola ffiiti oba omusawo.