Dynamic Treadmill Workout in Modern Gym

close-up low-angle photograph of a runner's lower legs and feet walking on a treadmill, white athletic sneakers with bright red heel accents, calves in motion, treadmill belt and side rails sharply visible, indoor gym setting with warm sunlight streaming from the right, shallow depth of field, dynamic motion blur on the rear foot, realistic sports lifestyle photography, glossy black treadmill surface with subtle reflections, metallic rails, clean modern fitness environment, energetic and focused atmosphere, shot with a wide-angle lens from behind at belt level