PMID- 28657863
OWN - NLM
STAT- MEDLINE
DCOM- 20180405
LR  - 20180405
IS  - 1466-447X (Electronic)
IS  - 0264-0414 (Linking)
VI  - 36
IP  - 8
DP  - 2018 Apr
TI  - Carbohydrate intake and training efficacy - a randomized cross-over study.
PG  - 942-948
LID - 10.1080/02640414.2017.1346276 [doi]
AB  - Carbohydrate (CHO) availability during endurance exercise seems to attenuate 
      exercise-induced perturbations of cellular homeostasis and might consequently 
      diminish the stimulus for training adaptation. Therefore, a negative effect of 
      CHO intake on endurance training efficacy seems plausible. This study aimed to 
      test the influence of carbohydrate intake on the efficacy of an endurance 
      training program on previously untrained healthy adults. A randomized cross-over 
      trial (8-week wash-out period) was conducted in 23 men and women with two 8-week 
      training periods (with vs. without intake of 50g glucose before each training 
      bout). Training intervention consisted of 4x45 min running/walking sessions/week 
      at 70% of heart rate reserve. Exhaustive, ramp-shaped exercise tests with gas 
      exchange measurements were conducted before and after each training period. 
      Outcome measures were maximum oxygen uptake (VO(2max)) and ventilatory anaerobic 
      threshold (VT). VO(2max) and VT increased after training regardless of CHO intake 
      (VO(2max): Non-CHO 2.6 +/- 3.0 ml*min(-1)*kg(-1) p = 0.004; CHO 
      1.4 +/- 2.5 ml*min(-1)*kg(-1) p = 0.049; VT: Non-CHO 4.2 +/- 4.2 ml*min(-1)*kg(-1) 
      p < 0.001; CHO 3.0 +/- 4.2 ml*min(-1)*kg(-1) p = 0.003). The 95% confidence 
      interval (CI) for the difference between conditions was between +0.1 and 
      +2.1 ml*min(-1)*kg(-1) for VO(2max) and between -1.2 and +3.1 for VT. It is 
      concluded that carbohydrate intake could potentially impair the efficacy of an 
      endurance training program.
FAU - Beaudouin, Florian
AU  - Beaudouin F
AD  - a Institute of Sports and Preventive Medicine , Saarland University, Faculty of 
      Clinical Medicine , Saarbrucken , Germany.
FAU - Joerg, Frederic
AU  - Joerg F
AD  - a Institute of Sports and Preventive Medicine , Saarland University, Faculty of 
      Clinical Medicine , Saarbrucken , Germany.
FAU - Hilpert, Anette
AU  - Hilpert A
AD  - a Institute of Sports and Preventive Medicine , Saarland University, Faculty of 
      Clinical Medicine , Saarbrucken , Germany.
FAU - Meyer, Tim
AU  - Meyer T
AD  - a Institute of Sports and Preventive Medicine , Saarland University, Faculty of 
      Clinical Medicine , Saarbrucken , Germany.
FAU - Hecksteden, Anne
AU  - Hecksteden A
AD  - a Institute of Sports and Preventive Medicine , Saarland University, Faculty of 
      Clinical Medicine , Saarbrucken , Germany.
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20170628
PL  - England
TA  - J Sports Sci
JT  - Journal of sports sciences
JID - 8405364
RN  - 0 (Blood Glucose)
RN  - 0 (Dietary Carbohydrates)
SB  - IM
MH  - Adaptation, Physiological
MH  - Adult
MH  - Anaerobic Threshold/physiology
MH  - Blood Glucose/metabolism
MH  - Cross-Over Studies
MH  - Dietary Carbohydrates/*administration & dosage
MH  - Exercise Test
MH  - Female
MH  - Heart Rate/physiology
MH  - Humans
MH  - Male
MH  - Middle Aged
MH  - Oxygen Consumption/physiology
MH  - *Physical Conditioning, Human
MH  - Physical Endurance/*physiology
MH  - Prospective Studies
MH  - Pulmonary Gas Exchange/physiology
OTO - NOTNLM
OT  - Glucose monohydrate
OT  - aerobic exercise
OT  - maximum oxygen uptake
OT  - physiological adaptation
EDAT- 2017/06/29 06:00
MHDA- 2018/04/06 06:00
CRDT- 2017/06/29 06:00
PHST- 2017/06/29 06:00 [pubmed]
PHST- 2018/04/06 06:00 [medline]
PHST- 2017/06/29 06:00 [entrez]
AID - 10.1080/02640414.2017.1346276 [doi]
PST - ppublish
SO  - J Sports Sci. 2018 Apr;36(8):942-948. doi: 10.1080/02640414.2017.1346276. Epub 
      2017 Jun 28.