Ngwa ndị ahọpụtara ntụtụ maka na-arụ ọrụ nke ọma triceps brachii muscle na inye aka na-arụ ọrụ serratus anterior muscle. Onye na-emega ahụ nwere ike rụpụta uru ahụ nke ogwe aka elu na ogwe aka nke ọma site n'ịkwanye aka aka na-eme ihe n'akụkụ abụọ n'otu oge ma họrọ oke kwesịrị ekwesị.