close-up of a person running on a treadmill, wearing grey sneakers

treadmill running exercise fitness health gym workout cardio training jogging weightloss stamina endurance motivation determination perseverance focus concentration effort hardwork dedication commitment lifestyle wellness wellbeing physicalactivity healthclub sports recreation leisure indoors activewear footwear shoes sneakers feet legs motion blur speed energy dynamic vibrant alive exciting exhilarating thrilling intense close-up person wearing grey walking surface generative