PMID- 8858410
OWN - NLM
STAT- MEDLINE
DCOM- 19970113
LR  - 20151119
IS  - 0172-4622 (Print)
IS  - 0172-4622 (Linking)
VI  - 17
IP  - 5
DP  - 1996 Jul
TI  - The influence of starch structure on glycogen resynthesis and subsequent cycling 
      performance.
PG  - 373-8
AB  - The present study was designed to evaluate the influence of starch structure on 
      muscle glycogen resynthesis and cycling performance. Eight male cyclists (22 +/- 
      1 yr) completed an exercise protocol (DP) to decrease vastus lateralis glycogen 
      concentration. This exercise consisted of 60 min cycling at 75% VO2max, followed 
      by six 1-min sprints at approximately 125% VO2max with 1 min rest intervals. In 
      the 12 hr after the exercise each subject consumed approximately 3000 kcal 
      (65:20:15% carbohydrate, fat and protein). All of the carbohydrate (CHO) consumed 
      was derived from one of four solutions; 1) glucose, 2) maltodextrin (glucose 
      polymer), 3) waxy starch (100% amylopectin), or 4) resistant starch (100% 
      amylose). Muscle biopsies were taken from the vastus lateralis muscle after DP 
      and 24 hr later to determine glycogen concentrations. A 30 min cycling time trial 
      (TT) was performed following the 24 hr post-DP muscle biopsy to examine the 
      influence of the feeding regimen on total work output. The post-DP glycogen 
      concentrations were similar among the four trials, ranging from 220.3 +/- 29.2 to 
      264 +/- 48.3 mmol.kg-1 dry weight (d.w.) muscle. Twenty-four hours after DP, 
      muscle glycogen concentration had increased less (p < 0.05) in the resistant 
      starch trial (+90.8 +/- 12.8 mmol.kg-1 d.w.) than in the glucose (+197.7 +/- 31.6 
      mmol.kg-1 d.w.), maltodextrin (+136.7 +/- 24.5 mmol.kg-1 d.w.) and waxy starch 
      (+171.8 +/- 37.1 mmol.kg-1 d.w.) trials. There were no differences in total work 
      output during the TT, or blood lactate concentration immediately following the TT 
      in any of the CHO trials. In summary, glycogen resynthesis was attenuated 
      following ingestion of starch with a high amylose content, relative to 
      amylopectin or glucose; however, short duration time trial performance was 
      unaffected.
FAU - Jozsi, A C
AU  - Jozsi AC
AD  - Human Performance Laboratory, Ball State University, Muncie, Indiana 47306, USA.
FAU - Trappe, T A
AU  - Trappe TA
FAU - Starling, R D
AU  - Starling RD
FAU - Goodpaster, B
AU  - Goodpaster B
FAU - Trappe, S W
AU  - Trappe SW
FAU - Fink, W J
AU  - Fink WJ
FAU - Costill, D L
AU  - Costill DL
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - Int J Sports Med
JT  - International journal of sports medicine
JID - 8008349
RN  - 0 (Polysaccharides)
RN  - 33X04XA5AT (Lactic Acid)
RN  - 7CVR7L4A2D (maltodextrin)
RN  - 9005-79-2 (Glycogen)
RN  - 9005-82-7 (Amylose)
RN  - 9037-22-3 (Amylopectin)
RN  - IY9XDZ35W2 (Glucose)
SB  - IM
MH  - Amylopectin/metabolism
MH  - Amylose/metabolism
MH  - Analysis of Variance
MH  - Bicycling/*physiology
MH  - Exercise/*physiology
MH  - Exercise Test
MH  - Glucose/metabolism
MH  - Glycogen/analysis/*biosynthesis
MH  - Humans
MH  - Lactic Acid/blood
MH  - Male
MH  - Muscle, Skeletal/chemistry
MH  - Polysaccharides/metabolism
MH  - Time Factors
EDAT- 1996/07/01 00:00
MHDA- 1996/07/01 00:01
CRDT- 1996/07/01 00:00
PHST- 1996/07/01 00:00 [pubmed]
PHST- 1996/07/01 00:01 [medline]
PHST- 1996/07/01 00:00 [entrez]
AID - 10.1055/s-2007-972863 [doi]
PST - ppublish
SO  - Int J Sports Med. 1996 Jul;17(5):373-8. doi: 10.1055/s-2007-972863.