a split-image stock photo showcasing a contrast in fitness levels.

woman thigh struggling stairs sports splitimage sitting showcasing running room person muscle model limb levels leg girl footwear fitness fashion effortlessly contrast comparison clothing arm adult abdomen fitness weight loss healthy lifestyle exercise stairs running struggle effort ease comparison active woman overweight fit motivation inspiration wellness sport workout female indoor staircase handrail sporty activewear lifestyle change cardio habits building strength toned body success positive energy determination active effortless smiling red shoes gray leggings pink shirt background model full close-up contrast health wellbeing