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Isotopic enrichments (IE) of [6,6-2H2]glucose (D2-glucose) over time for the 3 isotope trials. Values are means ± SE. PRE, 65% pretraining trial; ABT, same absolute workload as PRE; RLT, same relative workload (65% of posttraining V̇o2peak). †Significantly different from pretraining 65% (PRE) at P < 0.05. §Significantly different from posttraining (ABT) at P < 0.05.
