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Open AccessArticle

Can Creatine Supplementation Interfere with Muscle Strength and Fatigue in Brazilian National Level Paralympic Powerlifting?

1
Group of Studies and Research of Performance, Sport, Health and Paralympic Sports (GPEPS), Federal University of Sergipe (UFS), São Cristovão 49100-000, Sergipe, Brazil
2
Department of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Sergipe, Brazil
3
Program of Physical Education, Federal University of Sergipe (UFS), São Cristovão 49100-000, Sergipe, Brazil
4
Program of Physiological Science, Federal University of Sergipe (UFS), São Cristovão 49100-000, Sergipe, Brazil
5
College of Physical Education and Exercise Science, University of Brasília (UnB), Brasília 70910-900, Brazil
6
Program in Biotechnology, Northeast Network in Biotechnology (RENORBIO), Federal University of Sergipe (UFS), São Cristovão 49100-000, Sergipe, Brazil
7
Institute of Biological Sciences and Health, Federal University of Viçosa, Campus Florestal, Minas Gerais 35690-000, Brazil
8
Federal Institute of Education, Science and Technology of Ceará (IFCE), Campus of Juazeiro do Norte, Ceará 63040-540, Brazil
9
Brazilian Paralympic Academy, Brazilian Paralympic Committee, São Paulo 04329-000, SP, Brazil
10
Laboratory of Inflammation and Exercise Immunology, Sports Center, Physical Education Scholl, Federal University of OuroPreto (UFOP), OuroPreto, Minas Gerais 35400-000, Brazil
11
Department of Physical Education, Federal University of Rio Grande do Norte (UFRN), Natal, Rio Grande do Norte 59078-970, Brazil
12
Research Center in Sports Sciences, Health Sciences and Human Development (CIDESD), Trásos Montes and Alto Douro University, 5001-801 Vila Real, Portugal
*
Author to whom correspondence should be addressed.
Nutrients 2020, 12(9), 2492; https://doi.org/10.3390/nu12092492
Received: 6 July 2020 / Revised: 10 August 2020 / Accepted: 14 August 2020 / Published: 19 August 2020
(This article belongs to the Special Issue Nutrition and Athletic Performance)
The aim of the present study was to analyze the effect of creatine (Cr) supplementation on peak torque (PT) and fatigue rate in Paralympic weightlifting athletes. Eight Paralympic powerlifting athletes participated in the study, with 25.40 ± 3.30 years and 70.30 ± 12.15 kg. The measurements of muscle strength, fatigue index (FI), peak torque (PT), force (kgf), force (N), rate of force development (RFD), and time to maximum isometric force (time) were determined by a Musclelab load cell. The study was performed in a single-blind manner, with subjects conducting the experiments first with placebo supplementation and then, following a 7-day washout period, beginning the same protocol with creatine supplementation for 7 days. This sequence was chosen because of the lengthy washout of creatine. Regarding the comparison between conditions, Cr supplementation did not show effects on the variables of muscle force, peak torque, RFD, and time to maximum isometric force (p > 0.05). However, when comparing the results of the moments with the use of Cr and placebo, a difference was observed for the FI after seven days (U3: 1.12; 95% CI: (0.03, 2.27); p = 0.02); therefore, the FI was higher for placebo. Creatine supplementation has a positive effect on the performance of Paralympic powerlifting athletes, reducing fatigue index, and keeping the force levels as well as PT. View Full-Text
Keywords: Paralympic powerlifting; supplementation; creatine; performance Paralympic powerlifting; supplementation; creatine; performance
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MDPI and ACS Style

Soares Freitas Sampaio, C.R.; Aidar, F.J.; Ferreira, A.R.P.; Santos, J.L.d.; Marçal, A.C.; Matos, D.G.d.; Souza, R.F.d.; Moreira, O.C.; Guerra, I.; Fernandes Filho, J.; Marcucci-Barbosa, L.S.; Nunes-Silva, A.; Almeida-Neto, P.F.d.; Cabral, B.G.A.T.; Reis, V.M. Can Creatine Supplementation Interfere with Muscle Strength and Fatigue in Brazilian National Level Paralympic Powerlifting? Nutrients 2020, 12, 2492. https://doi.org/10.3390/nu12092492

AMA Style

Soares Freitas Sampaio CR, Aidar FJ, Ferreira ARP, Santos JLd, Marçal AC, Matos DGd, Souza RFd, Moreira OC, Guerra I, Fernandes Filho J, Marcucci-Barbosa LS, Nunes-Silva A, Almeida-Neto PFd, Cabral BGAT, Reis VM. Can Creatine Supplementation Interfere with Muscle Strength and Fatigue in Brazilian National Level Paralympic Powerlifting? Nutrients. 2020; 12(9):2492. https://doi.org/10.3390/nu12092492

Chicago/Turabian Style

Soares Freitas Sampaio, Carlos R.; Aidar, Felipe J.; Ferreira, Alexandre R.P.; Santos, Jymmys L.d.; Marçal, Anderson C.; Matos, Dihogo G.d.; Souza, Raphael F.d.; Moreira, Osvaldo C.; Guerra, Ialuska; Fernandes Filho, José; Marcucci-Barbosa, Lucas S.; Nunes-Silva, Albená; Almeida-Neto, Paulo F.d.; Cabral, Breno G.A.T.; Reis, Victor M. 2020. "Can Creatine Supplementation Interfere with Muscle Strength and Fatigue in Brazilian National Level Paralympic Powerlifting?" Nutrients 12, no. 9: 2492. https://doi.org/10.3390/nu12092492

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