Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise

Atef Salem; Achraf Ammar; Mohamed Kerkeni; Mohamed Boujelbane; Ayse Merve Uyar; Leonard Moritz Köbel; Saranya Selvaraj; Reza Zare; Katie M. Heinrich; Haitham Jahrami; Slim Tounsi; Giuseppe Grosso; Piotr Zmijewski; Wolfgang Schöllhorn; Khaled Trabelsi; Hamdi Chtourou

doi:10.5114/biolsport.2026.156734

Correction: Acute effects of beetroot juice vs. creatine supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise

Atef Salem

^{1, 2}

Achraf Ammar

^{1, 2, 3}

Mohamed Kerkeni

^{2, 4}

Mohamed Ali Boujelbane

^{1, 2}

Ayse Merve Uyar

Leonard Moritz Köbel

Saranya Selvaraj

⁵

Reza Zare

⁶

Katie M. Heinrich

^{7, 8}

Haitham Jahrami

^{9, 10}

Slim Tounsi

¹¹

Giuseppe Grosso

¹²

Piotr Zmijewski

¹³

Wolfgang I. Schöllhorn

Khaled Trabelsi

^{2, 4, 14}

Hamdi Chtourou

^{2, 15}

Department of Training and Movement Science, Institute of Sport Science, Johannes Gutenberg-University Mainz, 55122 Mainz, Germany
High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax 3000, Tunisia
Research Laboratory, Molecular Bases of Human Pathology, LR19ES13, Faculty of Medicine of Sfax, University of Sfax, Sfax 3000, Tunisia
Research Laboratory: Education, Motricity, Sport and Health, EM2S, LR19JS01, High Institute of Sport and Physical Education of Sfax, University of Sfax, Sfax 3000, Tunisia
Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Gangodawila, Nugegoda, Sri Lanka
SRH Campus Hamburg, SRH University of Applied Sciences Heidelberg, 20095 Hamburg, Germany
Department of Kinesiology, Kansas State University, Manhattan, KS 66506, USA
Department of Research and Evaluation, The Phoenix, Denver, CO 80205, USA
Government Hospitals, Manama, Bahrain
Department of Psychiatry, College of Medicine and Medical Sciences, Arabian Gulf University, Manama, Bahrain
Laboratory of Biopesticides (LBPES), Center of Biotechnology of Sfax, University of Sfax, Sfax, Tunisia
Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
Jozef Pilsudski University of Physical Education in Warsaw, 00-809 Warsaw, Poland
Department of Movement Sciences and Sports Training, School of Sport Science, The University of Jordan, Amman, Jordan
Research Unit, Physical Activity, Sport, and Health, UR18JS01, National Observatory of Sport, Tunis 1003, Tunisia

Biol Sport. 2026;43:659–660

Online publish date: 2025/12/03

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AMA

Salem A, Ammar A, Kerkeni M, et al. Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise. Biology of Sport. 2026;43(1):659-660. doi:10.5114/biolsport.2026.156734.

APA

Salem, A., Ammar, A., Kerkeni, M., Boujelbane, M. A., Uyar, A.,  & Köbel, L. et al. (2026). Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise. Biology of Sport, 43(1), 659-660. https://doi.org/10.5114/biolsport.2026.156734

Chicago

Salem, Atef, Achraf Ammar, Mohamed Kerkeni, Mohamed A Boujelbane, Ayse Merve Uyar, Leonard Moritz Köbel,  and Saranya Selvaraj et al. 2026. "Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise". Biology of Sport 43 (1): 659-660. doi:10.5114/biolsport.2026.156734.

Harvard

Salem, A., Ammar, A., Kerkeni, M., Boujelbane, M., Uyar, A., Köbel, L., Selvaraj, S., Zare, R., Heinrich, K., Jahrami, H., Tounsi, S., Grosso, G., Zmijewski, P., Schöllhorn, W., Trabelsi, K.,  and Chtourou, H. (2026). Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise. Biology of Sport, 43(1), pp.659-660. https://doi.org/10.5114/biolsport.2026.156734

MLA

Salem, Atef et al. "Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise." Biology of Sport, vol. 43, no. 1, 2026, pp. 659-660. doi:10.5114/biolsport.2026.156734.

Vancouver

Salem A, Ammar A, Kerkeni M, Boujelbane M, Uyar A, Köbel L et al. Correction: Acute effects of beetroot juice vs. creatine 
supplementation on maximal strength, autonomic regulation, and muscle oxygenation during incremental resistance exercise. Biology of Sport. 2026;43(1):659-660. doi:10.5114/biolsport.2026.156734.

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Erratum:

In the published article, an error was identified in Table 3. Table 3 presented the results of strength-test performances in the bench press and back squat across incremental intensities among novice resistance-trained subjects, including differences by supplementation and comparisons between conditions and intensities. However, the table mistakenly contained incorrect data for the number of maximum repetitions in the back squat across the three supplementation conditions and intensities.

The corrected Table 3 is provided below.

TABLE 3

ANOVA/LD.F2 Results for Strength Test Performances in Bench Press and Back Squat at Incremental Intensities, with Differences by Supplementation and Comparisons Between Conditions and Intensities.

	Supplementation Condition	BP			ANOVA/LD.F2	BS			ANOVA/LD.F2

		60%	70%	80%		60%	70%	80%
Maximum Repetitions	PLA	12.73 ± 2.94	7.27 ± 1.9 *	3.09 ± 1.45 *¤	SC: F_{(1.77, 17.70)} = 7.04, p = 0.007, η²_p = 0.413	13.73 ± 6.97	10.00 ± 5.00	6.00 ± 3.69 *	SC: F_{(1.44, 14.28)} = 5.72, p = 0.022, η²_p = 0.36

	CR	15.09 ± 4.13	10.18 ± 4.35 *	4.18 ± 2.18 *¤	I: F_{(1.85, 18.55)} = 198.29, p < 0.001, η²_p = 0.952	20.09 ± 8.68	11.45 ± 4.63 *	8.09 ± 4.44 *	I: F_{(1.61, 16.06)} = 48.25, p < 0.001, η²_p = 0.83

	BJ	15.45 ± 4.41	9.18 ± 3.74 *	5 ± 3.03 *¤	SC × I: F_{(2.87, 28.66)} = 0.97, p = 0.418, η²_p = 0.088	19.64 ± 9.28	13.09 ± 7.44	9.00 ± 4.63 *	SC × I: F_{(2.71, 27.09)} = 2.23, p = 0.113, η²_p = 0.18

Peak Velocity (m · s−1)	PLA	0.56 ± 0.08	0.44 ± 0.07 *	0.32 ± 0.06 *¤	SC: F_{(1.64, ∞)} = 40.75, p < 0.001, η²_p = 0.80	0.55 ± 0.1	0.49 ± 0.06	0.35 ± 0.06 *¤	SC: F_{(1.59, ∞)} = 37.18, p < 0.001, η²_p = 0.79

	CR	0.66 ± 0.07	0.54 ± 0.07 *	0.48 ± 0.06 *a	I: F_{(1.87, ∞)} = 72.48, p < 0.001, η²_p = 0.88	0.72 ± 0.09 a	0.58 ± 0.07 *	0.5 ± 0.06 *¤a	I: F_{(1.59, ∞)} = 119.26, p < 0.001, η²_p = 0.92

	BJ	0.72 ± 0.07 a	0.56 ± 0.08 *a	0.5 ± 0.08 *a	SC × I: F_{(3.09, ∞)} = 0.10, p = 0.961, η²_p = 0.01	0.64 ± 0.11	0.59 ± 0.09 a	0.46 ± 0.09 *¤a	SC × I: F_{(2.7, ∞)} = 1.94, p = 0.127, η²_p = 0.16

Peak Power (W)	PLA	508.24 ± 61.07	577.91 ± 57.73 *	767.99 ± 66.19 *¤	SC: F_{(1.54, 15.38)} = 0.90, p = 0.401, η²_p = 0.08	878.67 ± 49.87	1078.35 ± 60.52 *	1358.47 ± 81.45 *¤	SC: F_{(1.83, ∞)} = 1.58, p = 0.208, η²_p = 0.14

	CR	510.28 ± 57.17	617.88 ± 53.05 *	787.23 ± 62.66 *¤	I: F_{(1.97, 19.68)} = 251.52, p < 0.001, η²_p = 0.96	926.34 ± 38.17	1095.93 ± 59.45 *	1331.77 ± 97.25 *¤	I: F_{(1.91, ∞)} = 536.64, p < 0.001, η²_p = 0.98

	BJ	503.09 ± 69.57	594.65 ± 58.3 *	787.65 ± 49.57 *¤	SC × I: F_{(2.90, 28.98)} = 0.31, p = 0.810, η²_p = 0.03	849.11 ± 46.38 b	1092.39 ± 33.52 *	1347.83 ± 69.78 *¤	SC × I: F_{(3.08, ∞)} = 2.09, p = 0.097, η²_p = 0.17

Maximum Displacement (cm)	PLA	46.73 ± 2.57	39.82 ± 3.92 *	37.18 ± 1.66 *	SC: F_{(1.78, ∞)} = 0.42, p = 0.634, η²_p = 0.04	54.36 ± 2.11	49.73 ± 3.82 *	47.55 ± 2.11 *	SC: F_{(1.90, ∞)} = 2.22, p = 0.111, η²_p = 0.18

	CR	45.27 ± 4	41.18 ± 3.63	38.45 ± 1.44 *	I: F_{(1.26, ∞)} = 48.97, p < 0.001, η²_p = 0.83	54.64 ± 2.62	50.27 ± 3.1 *	47.27 ± 1.56 *¤	I: F_{(1.63, ∞)} = 112.31, p < 0.001, η²_p = 0.92

	BJ	45.73 ± 2.1	40.18 ± 3.57 *	37.73 ± 1.85 *	SC × I: F_{(2.76, ∞)} = 1.05, p = 0.364, η²_p = 0.10	56.09 ± 2.91	51.64 ± 2.98 *	47.73 ± 1.49 *¤	SC × I: F_{(2.59, ∞)} = 0.21, p = 0.866, η²_p = 0.02

BP: Bench press; BS: Back squat; PLA: Placebo; CR: Creatine; BJ: Beetroot juice; SC: main effect of supplementation condition; I: Main effect of intensity; SC × I: interaction between supplementation condition and intensity;

* : compared to 60%;

¤ : compared to 70%;

a : compared to PLA;

b : compared to CR.

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