nutrient timing Flashcards
gastric emptying
rate at which food leaves the stomach and enters the intestine
50% of stomach contents emptied in
2.5-3 hours
total emptying of the stomach in
4-5 hours
factors that slow GE
liquid vs solid (solid takes more time)
fats
individual variability
high intensity exercise
“training adaptions increase
SIRT1 and GLUT 5 which transport monosaccharides into the blood
protein and fat are more important than CHO for
growth and repair
energy substrate availabilty
training low for low to moderate intensity
-low glycogen leads to bonking
- high intensity activity reliant on CHO availablity
phases of nutrient timing
- preparation phase
- energy phase (during training/event)
- Post-exercise phase (post-exercise)
- Growth phase (remainder of the period of time until your next prep phase)
low glycogen promotes
- fatigue
- use of fat and protein
- stimulates AMPK
dietary considerations before workout
4 hours before PA
1 hour meal or snack
30 min snack
the goal of eating CHO (starches and sugars) before working out
so that insulin is back down prior to PA
reactive hyperglycemia and its affect
increase in insulin = removes blood glucose
and
muscle contraction = removes blood glucose
catecholamines due to warmup cause
reduction in insulin
moderate/ minimize protein within
2 hours of PA
training your gut advantages
- speed of gastric emptying and improve absorption
- reduced GI symptoms - bloating, GI distress
-increased delivery of CHO
-improved performance