PMID- 22614150
OWN - NLM
STAT- MEDLINE
DCOM- 20121211
LR  - 20161018
IS  - 1533-4287 (Electronic)
IS  - 1064-8011 (Linking)
VI  - 26
IP  - 6
DP  - 2012 Jun
TI  - Effects of carbohydrate supplementation on force output and time to exhaustion 
      during static leg contractions superimposed with electromyostimulation.
PG  - 1717-23
LID - 10.1519/JSC.0b013e318234ec0e [doi]
AB  - The purpose of this study was to investigate the effects of carbohydrate 
      ingestion on force output and time to exhaustion using single leg static 
      contractions superimposed with brief periods of electromyostimulation. Six 
      trained male subjects participated in a randomized, counterbalanced, double-blind 
      study. The subjects were randomly assigned to placebo (PL) or carbohydrate (CHO). 
      The subjects in CHO consumed 1 g of carbohydrate per kilogram of body mass 
      loading dose and 0.17 g of carbohydrate per kilogram of body mass every 6 minutes 
      during the exercise protocol. The PL received an equal volume of a solution made 
      of saccharin and aspartame. The exercise protocol consisted of repeated 20-second 
      static contractions of quadriceps muscle at 50% maximal voluntary contraction 
      followed by 40-second rest until failure occurred. Importantly, the force output 
      during quadriceps maximal voluntary contraction strength with superimposed 
      electromyostimulation was measured in the beginning and every 5 minutes during 
      the last 3 seconds of static contractions throughout the exercise protocol. 
      Venous blood samples were taken preexercise, immediately postexercise, and at 5 
      minutes postexercise and analyzed for blood lactate. Our results indicate that 
      time to exhaustion (PL = 16.0 +/- 8.1 minutes; CHO = 29.0 +/- 13.1 minutes) and force 
      output (PL = 3,638.7 +/- 524.5 N; CHO = 5,540.1 +/- 726.1 N) were significantly 
      higher (p < 0.05) in CHO compared with that in PL. Data suggest that carbohydrate 
      ingestion before and during static muscle contractions can increase force output 
      and increase time to exhaustion. Therefore, our data suggest that carbohydrate 
      supplementation before and during resistance exercise might help increase the 
      training volume of athletes.
FAU - Wax, Benjamin
AU  - Wax B
AD  - Department of Kinesiology, Mississippi State University, Mississippi State, 
      Mississippi, USA. bw244@msstate.edu
FAU - Brown, Stanley P
AU  - Brown SP
FAU - Webb, Heather E
AU  - Webb HE
FAU - Kavazis, Andreas N
AU  - Kavazis AN
LA  - eng
PT  - Journal Article
PT  - Randomized Controlled Trial
PL  - United States
TA  - J Strength Cond Res
JT  - Journal of strength and conditioning research
JID - 9415084
RN  - 0 (Carbohydrates)
RN  - 33X04XA5AT (Lactic Acid)
SB  - IM
MH  - Adult
MH  - Biomechanical Phenomena
MH  - Carbohydrates/*pharmacology
MH  - Dietary Supplements
MH  - Double-Blind Method
MH  - Exercise/*physiology
MH  - Fatigue
MH  - Humans
MH  - Lactic Acid/blood
MH  - Leg/physiology
MH  - Male
MH  - Muscle Contraction/*drug effects
MH  - Oxygen Consumption/*drug effects/physiology
MH  - Physical Endurance/*drug effects/physiology
MH  - Quadriceps Muscle/*drug effects/physiology
MH  - *Transcutaneous Electric Nerve Stimulation
EDAT- 2012/05/23 06:00
MHDA- 2012/12/12 06:00
CRDT- 2012/05/23 06:00
PHST- 2012/05/23 06:00 [entrez]
PHST- 2012/05/23 06:00 [pubmed]
PHST- 2012/12/12 06:00 [medline]
AID - 00124278-201206000-00036 [pii]
AID - 10.1519/JSC.0b013e318234ec0e [doi]
PST - ppublish
SO  - J Strength Cond Res. 2012 Jun;26(6):1717-23. doi: 10.1519/JSC.0b013e318234ec0e.