Effect of Low Dose Caffeine Ingestion on 8000–m Roller Skiing Performance

Year 2021, Volume: 2 Issue: 3, 126 - 135, 31.12.2021

Derya Çetin Sarişik Hülya Andre

Abstract

The aim of the study was to investigate the effect of relatively small caffeine dose (~3 mg.
kg-1) ingestion on 8000-m roller skiing time trial performance and heart rate (HR). The volunteers participating in the present study
were 9 female elite roller skiers with 16-19 years of age, the body weight of 55.3 ± 6.4 kg, the height of
164.2±3.7 cm, and a body mass index of 20.4 ± 1.8 kg/m2 . The experiment was a randomized double-blind
crossover design, which involved repeated measures of the same participants. Participants were randomly
divided into 2 groups and completed 2-time trials roller skiing performance for 8000 m. 60 min before each trial,
the subjects consumed 150 mg (~3 mg. kg-1) caffeine (CAF) (SİS-GO ENERGY - Double Espresso) or placebo
(PLA) in gel form. CAF and PLA intake were interverted between groups for the second trial. Throughout the
two 8000-m time trials, 1000 m split times and total time were recorded and immediately before and after time
trial performances heart rate (HR) was measured. Data were analyzed using the SPSS 26.0 software package.
Normality of distribution for outcome measures was tested using the Shapiro-Wilk test and it was determined
that the data showed normal distribution. Paired sample t-test was used to check possible differences between
intervention. Time trial performance was not statistically significant different between CAF and PLA trials
(p>.05). However, caffeine ingestion resulted in an average improvement of 45,23 seconds which is translated to
a 2,93% improvement in performance time. Additionally, 66,6% of the participants completed 8000-m roller
skiing time trial performance faster during the CAF trial compared to PLA trial. After the HR results
examination, it was seen that pre-test HR as well as post-test HR were not statistically significant different
between trials. In conclusion, caffeine ingestion resulted in a total mean reduction in performance time and also
did not increase HR compared to PLA. Therefore, relatively small CAF gel dose (~3 mg.
kg-1) might be used effectively pre-workout ergogenic aid when supplementation during the exercise is not possible.

Keywords

Caffeine, Heart Rate, Roller Skiing, Time Trial Performance

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