Person running on trail

people 40 44 years 40 45 years 40 49 years 40s active activities activity adult adults back to camera behind california cardiovascular activities cardiovascular activity cardiovascular exercise cardiovascular exercises cardiovascular workout caucasian caucasian ancestry caucasian ethnicity caucasians commitment committed concentrate concentrating concentration country countryside day days daytime determination determined discipline disciplined distance distant distant view distant views endurance exercise exercising far away field fields fitness focus forties full length grass health health and fitness high angle high angle view high angle views hill hills hillside hillsides horizontal landscape landscapes long distance los angeles male males mature adult mature adults mid adult mid adults mid adult mid adult man mid adults motivated motivation one person outdoor outdoors path paths pathway pathways physical fitness rear view road roads roadway roadways run runner runners running runs rural scenic scenic landscape scenic landscapes self control strength strong trail trail running training tree trees willpower