Her breaths came in short gasps, but she refused to back down.
When the ache had left her legs numb, and her breath was no longer coming in gasps, they started out again - across sand dunes - up and down.
She squirmed from his arms; her breath coming in short gasps.
It was silent aside from her choked gasps.
He was hardly underway before he geared down for the long climb and gradually fell into a rhythm of sorts, muscle-pulling pain and gasps of breath as he inched his way up the first long incline.