PMID- 29893600
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20231026
IS  - 1555-0273 (Electronic)
IS  - 1555-0265 (Linking)
VI  - 14
IP  - 1
DP  - 2019 Jan 1
TI  - Muscle Glycogen Utilization During an Australian Rules Football Game.
PG  - 122-124
LID - 10.1123/ijspp.2018-0106 [doi]
AB  - PURPOSE: To better understand the carbohydrate (CHO) requirement of Australian 
      Football (AF) match play by quantifying muscle glycogen utilization during an 
      in-season AF match. METHODS: After a 24-h CHO-loading protocol of 8 and 2 g/kg in 
      the prematch meal, 2 elite male forward players had biopsies sampled from m. 
      vastus lateralis before and after participation in a South Australian Football 
      League game. Player A (87.2 kg) consumed water only during match play, whereas 
      player B (87.6 kg) consumed 88 g CHO via CHO gels. External load was quantified 
      using global positioning system technology. RESULTS: Player A completed more 
      minutes on the ground (115 vs 98 min) and covered greater total distance (12.2 vs 
      11.2 km) than player B, although with similar high-speed running (837 vs 1070 m) 
      and sprinting (135 vs 138 m). Muscle glycogen decreased by 66% in player A (pre: 
      656 mmol/kg dry weight [dw], post: 223 mmol/kg dw) and 24% in player B (pre: 
      544 mmol/kg dw, post: 416 mmol/kg dw). CONCLUSION: Prematch CHO loading elevated 
      muscle glycogen concentrations (ie, >500 mmol/kg dw), the magnitude of which 
      appears sufficient to meet the metabolic demands of elite AF match play. The 
      glycogen cost of AF match play may be greater than in soccer and rugby, and CHO 
      feeding may also spare muscle glycogen use. Further studies using larger sample 
      sizes are now required to quantify the interindividual variability of glycogen 
      cost of match play (including muscle and fiber-type-specific responses), as well 
      examining potential metabolic and ergogenic effects of CHO feeding.
FAU - Routledge, Harry E
AU  - Routledge HE
FAU - Leckey, Jill J
AU  - Leckey JJ
FAU - Lee, Matt J
AU  - Lee MJ
FAU - Garnham, Andrew
AU  - Garnham A
FAU - Graham, Stuart
AU  - Graham S
FAU - Burgess, Darren
AU  - Burgess D
FAU - Burke, Louise M
AU  - Burke LM
FAU - Erskine, Robert M
AU  - Erskine RM
FAU - Close, Graeme L
AU  - Close GL
FAU - Morton, James P
AU  - Morton JP
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Int J Sports Physiol Perform
JT  - International journal of sports physiology and performance
JID - 101276430
SB  - IM
OTO - NOTNLM
OT  - AF
OT  - carbohydrate loading
OT  - high-speed running
OT  - vastus lateralis
EDAT- 2018/06/13 06:00
MHDA- 2018/06/13 06:01
CRDT- 2018/06/13 06:00
PHST- 2018/02/08 00:00 [received]
PHST- 2018/04/20 00:00 [revised]
PHST- 2018/05/21 00:00 [accepted]
PHST- 2018/06/13 06:01 [medline]
PHST- 2018/06/13 06:00 [pubmed]
PHST- 2018/06/13 06:00 [entrez]
AID - 10.1123/ijspp.2018-0106 [doi]
PST - ppublish
SO  - Int J Sports Physiol Perform. 2019 Jan 1;14(1):122-124. doi: 
      10.1123/ijspp.2018-0106.