PMID- 33771945
OWN - NLM
STAT- MEDLINE
DCOM- 20211028
LR  - 20220531
IS  - 1543-2920 (Electronic)
IS  - 0899-8493 (Linking)
VI  - 33
IP  - 2
DP  - 2021 Mar 25
TI  - Carbohydrate Drink Use During 30 Minutes of Variable-Intensity Exercise Has No 
      Effect on Exercise Performance in Premenarchal Girls.
PG  - 65-69
LID - pes.2020-0050 [pii]
LID - 10.1123/pes.2020-0050 [doi]
AB  - PURPOSE: This study examined the physiological, perceptual, and performance 
      effects of a 6% carbohydrate (CHO) drink during variable-intensity exercise (VIE) 
      and a postexercise test in premenarchal girls. METHODS: A total of 10 girls (10.4 
      [0.7] y) participated in the study. VO2peak was assessed, and the girls were 
      familiarized with VIE and performance during the first visit. The trial order 
      (CHO and placebo) was randomly assigned for subsequent visits. The drinks were 
      given before VIE bouts and 1-minute performance (9 mL/kg total). Two 15-minute 
      bouts of VIE were completed (10 repeated sequences of 20%, 55%, and 95% power at 
      VO2peak and maximal sprints) before a 1-minute performance sprint. RESULTS: The 
      mean power, peak power, heart rate (HR), %HRpeak, and rating of perceived 
      exertion during VIE did not differ between trials. However, the peak power 
      decreased, and the rating of perceived exertion increased from the first to the 
      second bout. During the 1-minute performance, there were no differences between 
      the trial (CHO vs placebo) for HR (190 [9] vs 189 [9] bpm), %HRpeak (97.0% [3.2%] 
      vs 96.6% [3.0%]), rating of perceived exertion (7.8 [2.3] vs 8.1 [1.9]), peak 
      power (238 [70] vs 235 [60] W), fatigue index (54.7% [10.0%] vs 55.9% [12.8%]), 
      or total work (9.4 [2.6] vs 9.4 [2.1] kJ). CONCLUSION: CHO supplementation did 
      not alter physiological, perceptual, or performance responses during 30 minutes 
      of VIE or postexercise sprint performance in premenarchal girls.
FAU - Heidorn, C Eric
AU  - Heidorn CE
AD  - Ball State University.
FAU - Dykstra, Brandon J
AU  - Dykstra BJ
AD  - Ball State University.
FAU - Conner, Cori A
AU  - Conner CA
AD  - Ball State University.
FAU - Mahon, Anthony D
AU  - Mahon AD
AD  - Ball State University.
LA  - eng
PT  - Clinical Trial
PT  - Journal Article
PT  - Research Support, Non-U.S. Gov't
DEP - 20210325
PL  - United States
TA  - Pediatr Exerc Sci
JT  - Pediatric exercise science
JID - 8909729
RN  - 0 (Carbohydrates)
SB  - IM
MH  - Carbohydrates
MH  - Child
MH  - Dietary Supplements
MH  - *Exercise
MH  - *Exercise Test
MH  - Female
MH  - Heart Rate
MH  - Humans
MH  - Physical Exertion
OTO - NOTNLM
OT  - children
OT  - cycle ergometry
OT  - sport
OT  - sports drink
EDAT- 2021/03/28 06:00
MHDA- 2021/10/29 06:00
CRDT- 2021/03/27 05:54
PHST- 2020/03/18 00:00 [received]
PHST- 2021/01/15 00:00 [revised]
PHST- 2021/01/27 00:00 [accepted]
PHST- 2021/03/28 06:00 [pubmed]
PHST- 2021/10/29 06:00 [medline]
PHST- 2021/03/27 05:54 [entrez]
AID - pes.2020-0050 [pii]
AID - 10.1123/pes.2020-0050 [doi]
PST - epublish
SO  - Pediatr Exerc Sci. 2021 Mar 25;33(2):65-69. doi: 10.1123/pes.2020-0050.