Athletic Man Exercises on Stepmill Stair Climber Machine in Modern Gym Looking Though Window On City Street in slow motion

stepmill stair climber machine walk climb cardio athletic athlete side view caucasian male man exercise legs active aerobic focused gym climber climbing stair staircase stairmaster step stepping stepper treadmill weight loss motivation looking calorie burn weight loosing doing sporty train city view window city gym slow motion sportswear one exercising endurance calories burn persistence intensive alone