close-up of woman's feet running on treadmill in modern gym with bright lights

feet running treadmill exercise fitness gym workout cardio health wellness weightloss training stamina endurance motivation determination perseverance focus concentration rhythm pace speed agility coordination balance control precision accuracy technique form posture alignment stride footstrike impact absorption propulsion energy momentum power strength conditioning performance improvement progress achievement goal success close-up woman#39aph39#s modern bright lights person walking surface generative