Table 3.

Effects of training in the fasted state vs. training in the carbohydrate-fed state on muscle glycogen content during a 2-h constant-load exercise bout

	F	CHO
Pretest
Before	585 ± 32	632 ± 40
After	276 ± 25	288 ± 21
Net breakdown	309 ± 27	344 ± 42
Posttest
Before	713 ± 42*	631 ± 26
After	397 ± 20*†	318 ± 23
Net breakdown	316 ± 31	313 ± 31

Data provided are means ± SE (F: n = 10; CHO: n = 10) and represent values (mmol/kg dry wt) before (pretest) and after (posttest) a 6-wk training period in either the fasted state (F) or with ample carbohydrate intake before and during the training sessions (CHO). Muscle glycogen content was measured before and at the end of a 2-h constant load cycling bout. The workload was 175 ± 6 W and corresponded to 65% of V̇o_2max in the pretest vs. 60% of V̇o_2max in the posttest. Glycogen content was measured using a standard enzymatic fluorometric assay.

^*P < 0.05 vs. pretest.

^†P < 0.05 vs. CHO.