autumn condition exercise fall fitness forest HDR health jog jogging Nyberg outdoor sport sports training tree wood athletics competition course female girl lane lanes mark outdoors participant race racecourse run runner running sprint stadium success track woman locomotive metal rail railro railway train bumper danger diagonal end railroad srtipe stripes wear worn yellow correr ejercicio grayscale grey leisure minimalistic pavement pictogram pictograma road sign signo workout active adult alongside bicycles bikes boy child confidence crash-helmet cycle cycling cyclist energetic energy environmentally-friendly fit helmet helmets learning movement moving on-the-move outing path pathway pedal-power pedalling pedals pushbikes recreation safety safety-helmets sporty supervised trainer-wheels transport transportation travel travelling trees wheels youngster appearance appearances background bridge cars colored coloring colors coloured colouring colours contrast contrasting freeway gray hillside Kings-Park light overpass Perth plants roads scenery scenic shadow shadows shrubbery shrubs sunlight surfaces Swan-River traffic underpass vegetation vehicles views