Drone flight in the Burguillo reservoir where a swimming resistance test is carried out, we see a large number of participating swimmers with their buoys and an assistant on a surfboard

flight burguillo reservoir competition ofendurance participants swimming buoys landscape 10 bit color 2997fps event sport nature aquatic competition career athletes i swim water reservoir physical resistance sporting event scene around view swimmers sweet water proof competence aquatic event endurance swimming natural reservoir competition in the water natural landscape swimmers with buoys reservoir competitionacuatic sport scenery swimming race endurance swimmers natural environment resistance in water province of avila