LL, I stumbled upon this study that seems to suggest fructose may be almost as good as glucose at refilling muscle glycogen:
Effect of different post-exercise sugar diets on the rate of muscle glycogen synthesis.
Blom PC, Hostmark AT, Vaage O, Kardel KR, Maehlum S.
Department of Physiology, National Institute of Occupational Health, Oslo, Norway.
The effect of repeated ingestions of fructose, sucrose, and various amounts of glucose on muscle glycogen synthesis during the first 6 h after exhaustive bicycle exercise was studied. Muscle biopsies for glycogen determination were taken before and after exercise, and every second hour during recovery. Blood samples for plasma glucose and insulin determination were taken before and after exercise, and every hour during recovery. When 0.35 (low glucose: N equals 5), 0.70 (medium glucose: N equals 5), or 1.40 (high glucose: N equals 5) g.kg-1 body weight of glucose were given orally at 0, 2, and 4 h after exercise, the rates of glycogen synthesis were (mean +/- SE) 2.1 +/- 0.5, 5.8 +/- 1.0, and 5.7 +/- 0.9 mmol.kg-1.h-1, respectively. When 0.70 g.kg-1 body weight of sucrose (medium sucrose: N equals 5), or fructose (medium fructose: N equals 7) was ingested accordingly, the rates were 6.2 +/- 0.5 and 3.2 +/- 0.7 mmol.kg-1.h-1. Average plasma glucose level during recovery were similar in low glucose, medium glucose, and high glucose groups (5.76 +/- 0.24, 6.31 +/- 0.64, and 6.52 +/- 0.24 mM), while average plasma insulin levels were higher with higher glucose intake (16 +/- 1, 21 +/- 3, and 38 +/- 4 microU.ml-1).
Firstly, am I reading this correctly? And secondly if I am how is this possible? I thought fructose could only be used to refill liver glycogen.
Thanks a lot as always