The "second wind" phenomenon in constant load exercise.
D000293:Adolescent; D000328:Adult; D005221:Fatigue; D005260:Female; D006801:Humans; D007866:Leg; D008297:Male; D010146:Pain; D005082:Physical Exertion; D011674:Pulse; D012119:Respiration; D013178:Sports Medicine; D011795:Surveys and Questionnaires; D013997:Time Factors