Acute consumption of p-synephrine does not enhance performance in sprint athletes

作者：Gutierrez Hellin Jorge; Jose Salinero Juan; Abian Vicen Javier; Areces Francisco; Lara Beatriz; Gallo Cesar; Puente Carlos; Del Coso Juan

来源：Applied Physiology Nutrition and Metabolism, 2016, 41(1): 63-69.

DOI：10.1139/apnm-2015-0299

• doping
• exercise
• nutrition
• sports
• performance
• Citrus aurantium
• bitter orange
• safety

P-Synephrine is a protoalkaloid widely used as an ergogenic aid in sports. This substance has been included in the World Anti-Doping Agency monitoring program, although scientific information about its effects on performance and athletes' well-being is scarce. The purpose of this investigation was to determine the effectiveness of p-synephrine to increase performance in sprint athletes. In a randomized and counterbalanced order, 13 experienced sprinters performed 2 acute experimental trials after the ingestion of p-synephrine (3 mg.kg(-1)) or after the ingestion of a placebo (control trial). Forty-five minutes after the ingestion of the substances, the sprinters performed a squat jump, a countermovement jump, a 15-s repeated jump test, and subsequently performed 60-m and 100-m simulated sprint competitions. Self-reported questionnaires were used to assess side-effect prevalence. In comparison with the control trial, the ingestion of p-synephrine did not change countermovement jump height (37.4 +/- 4.2 vs 36.7 +/- 3.3 cm, respectively; P = 0.52), squat jump height (34.4 +/- 3.6 vs 33.9 +/- 3.7 cm; P = 0.34), or average 15-s repeated jumps height (31.8 +/- 4.1 vs 32.2 +/- 3.6 cm; P = 0.18). P-Synephrine did not modify maximal running speed during the 60-m (9.0 +/- 0.5 vs 9.0 +/- 0.4 m.s(-1), respectively; P = 0.55) and 100-m sprint competitions (8.8 +/- 0.5 vs 8.8 +/- 0.5 m.s(-1), respectively; P = 0.92). The ingestion of p-synephrine did not alter the prevalence of headache, gastrointestinal discomforts, muscle pain, or insomnia during the hours following the tests. Acute consumption of 3 mg.kg(-1) of p-synephrine was ineffective to increase performance in competitive sprint athletes. Moreover, p-synephrine did not increase the occurrence of side effects after the competition.

• 出版日期2016-1