A dense pack of runners surges forward under a start arch at the beginning of a road race, capturing energy, teamwork and determination in a vibrant outdoor athletic event.

crowd runners marathon race start competition athletic fitness stamina outdoor event street charity sports group motion energy training athlete running sprint joggers bib pace teamwork healthy mass organized urban morning colorful crowding excitement spectators preparation determination goal challenge adrenaline community clothing footwear movement lane route tempo warmup focus endurance