Galactose Mediated Glycogen Resynthesis

Galactose Mediated Glycogen Resynthesis and the Effects on Metabolism During Subsequent Exercise

This study will compare short-term post-exercise muscle glycogen synthesis following combined galactose-glucose, glucose alone or galactose alone ingestion.

Lactose, the sugar contained within milk, consists of glucose and galactose. Post-exercise consumption of a carbohydrate mixture containing glucose with galactose has been shown to accelerate liver glycogen repletion as compared to glucose-only provision. However, the extent to which galactose-glucose combinations influence post-exercise muscle glycogen storage has yet to be determined.

Therefore, this study will investigate whether short-term muscle glycogen storage after strenuous endurance exercise is enhanced by combined galactose-glucose or glucose only ingestion as compared to the ingestion of galactose alone.

Inclusion Criteria:.

• Body mass index in the range: 18.5 - 27.5 kg/m2
• Participates in endurance-based exercise (e.g. cycling, running, rowing) at least 3 times per week
• Aerobic fitness: VO2max >45 ml/kg/min (men), >40 ml/kg/min (women)

Exclusion Criteria:

• Lidocaine allergy
• Current participation in another scientific/clinical study
• Bleeding disorder/s
• Current or recent smoker to include vaping (last 60 days)
• Vegan
• Existence of food intolerances
• Poor recent health as indicated in the general health questionnaire
• Engage in uncommon eating practices (e.g. sustained periods of fasting)
• Diagnosed with galactosemia