悪条件 adverse condition

悪条件での走りがうまい be good at running under difficult circumstances

悪条件で長時間働く work long hours in bad conditions

悪条件の下で最善を尽くす make the best of a bad [terrible] bargain [job, situation]

悪条件の元で under miserable conditions

悪条件の中必死で山に登る struggle up the mountain under adverse conditions

悪条件を克服する get over a handicap