Morning versus Evening Intake of Creatine in Elite Female Handball Players

Jose Manuel Jurado-Castro, Julián Campos-Pérez, M Ángeles Vilches-Redondo, Fernando Mata, Ainoa Navarrete-Pérez and Antonio Ranchal-Sanchez
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Jose Manuel Jurado-Castro: Metabolism and Investigation Unit, Maimonides Biomedical Research Institute of Cordoba (IMIBIC), Reina Sofia University Hospital, University of Cordoba, 14004 Cordoba, Spain
Julián Campos-Pérez: Department of Food Science and Technology, Rabanales University Campus, University of Cordoba, 14071 Cordoba, Spain
M Ángeles Vilches-Redondo: Department of Nursing, Pharmacology and Physiotherapy, Faculty of Medicine and Nursing, University of Cordoba, 14071 Cordoba, Spain
Fernando Mata: Centro de Estudios Avanzados en Nutrición (CEAN), 14010 Cordoba, Spain
Ainoa Navarrete-Pérez: Neuroplasticity and Oxidative Stress, Maimonides Biomedical Research Institute of Córdoba (IMIBIC), University of Córdoba, 14004 Cordoba, Spain
Antonio Ranchal-Sanchez: Department of Nursing, Pharmacology and Physiotherapy, Faculty of Medicine and Nursing, University of Cordoba, 14071 Cordoba, Spain

IJERPH, 2021, vol. 19, issue 1, 1-11

Abstract: A great deal of evidence has been gathered on the use of creatine as an ergogenic supplement. Recent studies show greater benefits when creatine ingestion is performed close in time to training, but few studies tackle the way that circadian rhythms could influence creatine consumption. The aim of this study was therefore to observe the influence circadian rhythms exert on sports performance after creatine supplementation. Our method involved randomly assigning fourteen women players of a handball team into two groups in a single-blind study: one that consumed the supplement in the morning and one that consumed it in the evening, with both groups following a specific training program. After twelve weeks, the participants exhibited a decreased fat percentage, increased body weight and body water, and improved performance, with these results being very similar in the two groups. It is therefore concluded that, although circadian rhythms may influence performance, these appear not to affect creatine supplementation, as creatine is stored intramuscularly and is available for those moments of high energy demand, regardless of the time of day.

Keywords: woman; female; sports training; sports performance; creatine; circadian rhythms; sports performance (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
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