PMID- 11417433
OWN - NLM
STAT- MEDLINE
DCOM- 20011204
LR  - 20081121
IS  - 1439-6319 (Print)
IS  - 1439-6319 (Linking)
VI  - 84
IP  - 5
DP  - 2001 May
TI  - Resynthesis of muscle glycogen after soccer specific performance examined by 
      13C-magnetic resonance spectroscopy in elite players.
PG  - 443-7
AB  - The purpose of this study was to examine using 13C-magnetic resonance 
      spectroscopy whether muscle glycogen (Gly) utilized during a simulation of a 
      fatiguing soccer match followed by repeated sprints would be resynthesized during 
      the next 24 h while players consumed their habitual diet. A group of 12 elite 
      young players [mean age 17.5 (SD 0.8) years, mean body mass 68.9 (SD 6.6) kg, 
      mean height 177.0 (SD 5.4) cm] participated in the study. Average muscle Gly 
      content before the simulation was 134 (SD 16) mmol.(kg wet mass)-1 and decreased 
      during the test (P < 0.001) to 80 (SD 29) mmol.(kg wet mass)-1. The value had 
      increased (P < 0.01) to 122 (SD 33) mmol.(kg wet mass)-1 24 h later but it was 
      not significantly different from the value obtained before the soccer test. 
      Dietary analysis of the food intake during the 24 h after the running test 
      revealed that players consumed an average of 2,681 (SD 970) kcal.day-1. Mean 
      daily protein, fat, and carbohydrate (CHO) intakes were 85 (SD 29), 99 (SD 44), 
      and 327 (SD 116) g, respectively. The mean amounts of CHO intake normalised to 
      body mass were 4.8 (SD 1.8) g.(kg body mass)-1. In conclusion, the results of 
      this study showed that despite a CHO intake of less than 5 g.(kg body mass)-1 the 
      habitual diet of soccer players might be sufficient to replenish in 24 h the 
      muscle Gly utilized during soccer specific performance. However, cumulative 
      deficits of about 10% in Gly replenishment as found in the present study might 
      provoke decrements in performance. Thus, players should pay attention to their 
      habitual diets and add more carbohydrates to replenish their daily deficits and 
      perhaps increase their basal levels of intake.
FAU - Zehnder, M
AU  - Zehnder M
AD  - Institute for Human Movement Sciences, Swiss Federal Institute of Technology 
      Zurich and Institute of Physiology, University of Zurich, Winterthurerstr. 190, 
      8057 Zurich, Switzerland.
FAU - Rico-Sanz, J
AU  - Rico-Sanz J
FAU - Kuhne, G
AU  - Kuhne G
FAU - Boutellier, U
AU  - Boutellier U
LA  - eng
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
PL  - Germany
TA  - Eur J Appl Physiol
JT  - European journal of applied physiology
JID - 100954790
RN  - 0 (Carbon Isotopes)
RN  - 9005-79-2 (Glycogen)
SB  - IM
MH  - Adolescent
MH  - Carbon Isotopes
MH  - Diet
MH  - Glycogen/*biosynthesis
MH  - Humans
MH  - *Magnetic Resonance Spectroscopy
MH  - Muscle, Skeletal/*metabolism
MH  - Physical Exertion/*physiology
MH  - *Soccer
MH  - Time Factors
EDAT- 2001/06/22 10:00
MHDA- 2002/01/05 10:01
CRDT- 2001/06/22 10:00
PHST- 2001/06/22 10:00 [pubmed]
PHST- 2002/01/05 10:01 [medline]
PHST- 2001/06/22 10:00 [entrez]
AID - 10.1007/s004210100389 [doi]
PST - ppublish
SO  - Eur J Appl Physiol. 2001 May;84(5):443-7. doi: 10.1007/s004210100389.