PMID- 10658039
OWN - NLM
STAT- MEDLINE
DCOM- 20000303
LR  - 20171213
IS  - 8750-7587 (Print)
IS  - 0161-7567 (Linking)
VI  - 88
IP  - 2
DP  - 2000 Feb
TI  - Effect of menstrual cycle phase on carbohydrate supplementation during prolonged 
      exercise to fatigue.
PG  - 690-7
AB  - The effects of menstrual cycle phase and carbohydrate (CHO) supplementation were 
      investigated during prolonged exercise. Nine healthy, moderately trained women 
      cycled at 70% peak O(2) consumption until exhaustion. Two trials were completed 
      during the follicular (Fol) and luteal (Lut) phases of the menstrual cycle. 
      Subjects consumed 0.6 g CHO. kg body wt(-1). h(-1) (5 ml/kg of a 6% CHO solution 
      every 30 min beginning at min 30 of exercise) or a placebo drink (Pl) during 
      exercise. Time to exhaustion during CHO increased from Pl values (P < 0.05) by 
      14.4 +/- 8.5 (Fol) and 11.4 +/- 7.1% (Lut); no differences were observed between 
      menstrual cycle phases. CHO attenuated (P < 0.05) the decrease in plasma glucose 
      and insulin and the increase in plasma free fatty acids, tryptophan, epinephrine, 
      and cortisol observed during Pl for both phases. Plasma alanine, glutamine, 
      proline, and isoleucine were lower (P < 0.05) in Lut than in Fol phase. CHO 
      resulted in lower (P < 0.05) plasma tyrosine, valine, leucine, isoleucine, and 
      phenylalanine. These results indicate that the menstrual cycle phase does not 
      alter the effects of CHO supplementation on performance and plasma levels of 
      related substrates during prolonged exercise.
FAU - Bailey, S P
AU  - Bailey SP
AD  - Department of Physical Therapy Education, Elon College, Elon College, North 
      Carolina 27244, USA. baileys@elon.edu
FAU - Zacher, C M
AU  - Zacher CM
FAU - Mittleman, K D
AU  - Mittleman KD
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - United States
TA  - J Appl Physiol (1985)
JT  - Journal of applied physiology (Bethesda, Md. : 1985)
JID - 8502536
RN  - 0 (Amino Acids)
RN  - 0 (Dietary Carbohydrates)
RN  - 0 (Fatty Acids, Nonesterified)
RN  - 0 (Insulin)
RN  - WI4X0X7BPJ (Hydrocortisone)
RN  - X4W3ENH1CV (Norepinephrine)
RN  - YKH834O4BH (Epinephrine)
SB  - IM
MH  - Adult
MH  - Amino Acids/blood
MH  - Blood Pressure/drug effects
MH  - Dietary Carbohydrates/*administration & dosage
MH  - Dietary Supplements
MH  - Epinephrine/blood
MH  - Exercise/*physiology
MH  - Fatigue/*physiopathology/psychology
MH  - Fatty Acids, Nonesterified/blood
MH  - Female
MH  - Heart Rate/drug effects
MH  - Humans
MH  - Hydrocortisone/blood
MH  - Insulin/blood
MH  - Menstrual Cycle/*physiology
MH  - Norepinephrine/blood
MH  - Oxygen Consumption/drug effects/physiology
MH  - Pulmonary Gas Exchange/drug effects
EDAT- 2000/02/05 09:00
MHDA- 2000/03/11 09:00
CRDT- 2000/02/05 09:00
PHST- 2000/02/05 09:00 [pubmed]
PHST- 2000/03/11 09:00 [medline]
PHST- 2000/02/05 09:00 [entrez]
AID - 10.1152/jappl.2000.88.2.690 [doi]
PST - ppublish
SO  - J Appl Physiol (1985). 2000 Feb;88(2):690-7. doi: 10.1152/jappl.2000.88.2.690.