The effects of acute creatine loading on repeat cycling and multiple sprint loading
Ahmun, Robert Patrick
University of Wales Institute, Cardiff
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Purpose: To determine the effects of acute creatine loading on repeat cycling and multiple sprint performance in rugby players. Method: A group of 14 highly trained male rugby players (age 20.6 ± l.2yt.; stature 181.6 ± 4.7 cm; mass 88'7 ± 13'1 kg1; sum of four skinfolds 43.2 ± 18.5 mm: percent body fat 18.6 ± 8.1 %) performed a 10 x 6 s Wingate test and a 10 x 40 m sprint test on separate days. They were then split into two equal groups and received, in a single blind manner, two supplementation regimens (20 g . d x 5 d) of either Pl→Cr or Cr→Pl. Testing was repeated immediately after the five days of supplementation and again aftet a washout period of 28 d when the supplementation regimes were reversed. Results and Conclusion: Acute Cr loading caused no significant group x test interactions for peak power output, minimum power output, total work done, fatigue index, peak running speed, slowest running speed or body mass respectively. However, it should be noted that this regimen did cause a number of improvements that would be beneficial to rugby players. For example, an increase in peak running speed coupled with an increase in body mass (86.5 kg to 90.0 kg) would afford players to carry more momentum into tackle situations.
MSc Sport and Exercise Sciences
- Masters Degrees (Sport)