PMID- 32610573
OWN - NLM
STAT- MEDLINE
DCOM- 20210225
LR  - 20210225
IS  - 2072-6643 (Electronic)
IS  - 2072-6643 (Linking)
VI  - 12
IP  - 7
DP  - 2020 Jun 29
TI  - The Performance Effect of Scheduled Carbohydrate and Caffeine Intake during 
      Simulated Team Sport Match-Play.
LID - 10.3390/nu12071926 [doi]
LID - 1926
AB  - The aim of the current investigation was to identify the effects of scheduled 
      carbohydrate (CHO) and caffeine (CAF) supplementation on simulated team sport 
      match-play performance. Ten male hurling players completed three hurling 
      match-play simulation protocols (HSP) performed 7 days apart in a double-blind, 
      randomized design. Supplementation included CHO, CHO + CAF, and placebo (PLA). In 
      a randomized order, participants ingested either a 6% CHO solution, a PLA 
      solution of similar taste, or a combined intake of 6% CHO solution + 200 mg CAF 
      capsule. At specific time points (Pre-0 min; half time (HT)-30 min; full time 
      (FT)-60 min), participants completed a repeated sprint protocol (RAST; 12 x 20 
      m). Physiological [% maximal oxygen uptake (%VO(2max)), % mean oxygen uptake 
      (%VO(2mean)), % maximal heart rate (%HR(max)), % mean heart rate (%HR(mean)), 
      respiratory exchange ratio (RER), and blood lactate (BLa)] and performance [(best 
      sprint time (RSA(best)), mean sprint time (RSA(mean)), and rate of perceived 
      exertion (RPE)] variables were monitored throughout each simulation. 
      Non-significant differences were observed between supplement trials (CHO, CHO + 
      CAF, and PLA) for BLa (eta(2) = 0.001, small), %VO(2max) (eta(2) = 0.001, small), 
      %VO(2mean) (eta(2) = 0.004, small), %HR(max) (eta(2) = 0.007, small), %HR(mean) (eta(2) 
      = 0.018, small), RER (eta(2) = 0.007, small), RPE (eta(2) = 0.007, small), and 
      RSA(best) (eta(2) = 0.050, small). RSA(mean) performance significantly improved in 
      CHO + CAF trials compared to PLA, with sprint times significantly improved from 
      Pre to FT also (eta(2) = 0.135, medium). A significant difference was observed in 
      BLa between time points (Pre, HT, and FT) (eta(2) = 0.884, large) in % HRmax (eta(2) 
      = 0.202, medium), %HR(mean) (eta(2) = 0.477, large), and RER (eta(2) = 0.554, large) 
      across halves and in RPE across time points (eta(2) = 0.670, large). Our data 
      provide novel data regarding the effects of CHO and CAF supplementation on team 
      sport performance, with co-ingestion of CHO + CAF reducing the decrement in 
      repeated sprint performance compared to PLA.
FAU - Keane, John
AU  - Keane J
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
FAU - Shovlin, Aidan
AU  - Shovlin A
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
FAU - Devenney, Simon
AU  - Devenney S
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
FAU - Malone, Shane
AU  - Malone S
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
FAU - Young, Damien
AU  - Young D
AD  - Limerick Institute of Technology, Thurles Campus, V94 EC5T Limerick, Ireland.
FAU - Coratella, Giuseppe
AU  - Coratella G
AUID- ORCID: 0000-0001-7523-9102
AD  - Department of Biomedical Sciences for Health, Universita degli Studi di Milano, 
      20133 Milan, Italy.
FAU - Collins, Kieran
AU  - Collins K
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
FAU - Shortall, Marcus
AU  - Shortall M
AD  - Gaelic Sports Research Centre, Department of Science, Tallaght Campus, 
      Technological University Dublin, 24, D24 FKT9 Dublin, Ireland.
LA  - eng
GR  - PPRA1714: Evaluating the work rate and physiological demands of 
      hurling/Technological University Dublin/
PT  - Journal Article
PT  - Randomized Controlled Trial
DEP - 20200629
PL  - Switzerland
TA  - Nutrients
JT  - Nutrients
JID - 101521595
RN  - 0 (Dietary Carbohydrates)
RN  - 33X04XA5AT (Lactic Acid)
RN  - 3G6A5W338E (Caffeine)
SB  - IM
MH  - Athletic Performance/*physiology
MH  - Caffeine/*administration & dosage
MH  - Dietary Carbohydrates/*administration & dosage
MH  - *Dietary Supplements
MH  - Double-Blind Method
MH  - Drug Administration Schedule
MH  - Heart Rate/drug effects
MH  - Humans
MH  - Lactic Acid/blood
MH  - Male
MH  - Oxygen Consumption/drug effects
MH  - Physical Exertion/drug effects
MH  - Running/physiology
MH  - Sports/*physiology
MH  - Team Sports
MH  - Time Factors
MH  - Young Adult
PMC - PMC7400375
OTO - NOTNLM
OT  - aerobic performance
OT  - ergogenic aids
OT  - internal load
OT  - repeated sprint-ability
OT  - team sports
COIS- The authors declare no conflict of interest with regard to this study.
EDAT- 2020/07/03 06:00
MHDA- 2021/02/26 06:00
PMCR- 2020/07/01
CRDT- 2020/07/03 06:00
PHST- 2020/04/25 00:00 [received]
PHST- 2020/06/19 00:00 [revised]
PHST- 2020/06/24 00:00 [accepted]
PHST- 2020/07/03 06:00 [entrez]
PHST- 2020/07/03 06:00 [pubmed]
PHST- 2021/02/26 06:00 [medline]
PHST- 2020/07/01 00:00 [pmc-release]
AID - nu12071926 [pii]
AID - nutrients-12-01926 [pii]
AID - 10.3390/nu12071926 [doi]
PST - epublish
SO  - Nutrients. 2020 Jun 29;12(7):1926. doi: 10.3390/nu12071926.