silhouettes - 4x400 relay start

400 action athlete athletic athletics ballistic bang baton black block blocks bronze busy champion championship coach color competition computer contest control edge fatigue fitness focus friend friendship gold good heavy hurdles lactic lead loyalty medal medallist muscle olimpia olimpiadi olympiad perfection podium power precision pressure push race racing reaction reactivity record reflex relay rest ring runner sane silhouette silver simple small soft special sport sportflex stress tartan team thin tired track trainer training travel weight well wet white world