title: Changes in 2,3-Diphosphoglycerate (2,3-DPG) after exercise.
abstract: Previous studies of the influence of physical exercise on erythrocyte 2,3-DPG have shown conflicting results, including that exercise induces increase, decrease or no changes in 2,3-DPG. Assuming that the interplay between the factors governing 2,3-DPG metabolism may change considerably during the early phase of recovery after exercise, the level of erythrocyte 2,3-DPG was examined over a prolonged period of time after heavy exercise in five healthy men, on 3 separate days, the duration of exercise being 6 min, 6 min + 6 min with 1 h of rest between, and 60 min, respectively. The short exercise periods were accompanied by a substantial lactate acidosis, whereas the 60 min work was essentially aerobic. With the 6 min work, the erythrocyte 2,3-DPG was unchanged or slightly reduced immediately after and 15 min after the end of exercise, then rose to a new level, 8% above the initial level,  30 min after the exercise (P less than 0.001). With the 6 + 6 min work, the pattern of change followed both bouts of exercise, resulting in a two-step increase of 2,3-DPG, to a new level 12% above its initial value (P less than 0.001). With the 60 min work, 2,3-DPG was increased after a new level, 10% above initial value, 45 min after the exercise (P less than 0.001). With all three types of exercise 2,3-DPG remained unchanged during the following 4 h. Thus, heavy exercise is followed by a definite, slowly developing increase in erythrocyte 2,3-DPG, reaching a new level 30-45 min after exercise.
mesh_terms: D019794:2,3-Diphosphoglycerate; D000328:Adult; D004163:Diphosphoglyceric Acids / Q000096:biosynthesis*; D004912:Erythrocytes / Q000378:metabolism / Q000502:physiology; D006400:Hematocrit; D006801:Humans; D006863:Hydrogen-Ion Concentration; D007773:Lactates / Q000097:blood; D008297:Male; D008875:Middle Aged; D005082:Physical Exertion; D013997:Time Factors
chemical_list: D004163:Diphosphoglyceric Acids; D007773:Lactates; D019794:2,3-Diphosphoglycerate