Acute consumption of a caffeinated energy drink enhances aspects of performance in sprint swimmers.
This study investigated the effect of a caffeinated energy drink on various aspects of performance in sprint swimmers. In a randomised and counterbalanced order, fourteen male sprint swimmers performed two acute experimental trials after the ingestion of a caffeinated energy drink (3 mg/kg) or after the ingestion of the same energy drink without caffeine (0 mg/kg; placebo). After 60 min of ingestion of the beverages, the swimmers performed a countermovement jump, a maximal handgrip test, a 50 m simulated competition and a 45 s swim at maximal intensity in a swim ergometer. A blood sample was withdrawn 1 min after the completion of the ergometer test. In comparison with the placebo drink, the intake of the caffeinated energy drink increased the height in the countermovement jump (49.4 (SD 5.3) v. 50.9 (SD 5.2) cm, respectively; P<0.05) and maximal force during the handgrip test with the right hand (481 (SD 49) v. 498 (SD 43) N; P<0.05). Furthermore, the caffeinated energy drink reduced the time needed to complete the 50 m simulated swimming competition (27.8 (SD 3.4) v. 27.5 (SD 3.2) s; P<0.05), and it increased peak power (273 (SD 55) v. 303 (SD 49) W; P <0.05) and blood lactate concentration (11.0 (SD 2.0) v. 11.7 (SD 2.1) mM; P<0.05) during the ergometer test. The caffeinated energy drink did not modify the prevalence of insomnia (7 v. 7%), muscle pain (36 v. 36%) or headache (0 v. 7%) during the hours following its ingestion (P>0.05). A caffeinated energy drink increased some aspects of swimming performance in competitive sprinters, whereas the side effects derived from the intake of this beverage were marginal at this dosage.
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Beatriz
B
Lara
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Diana
D
Ruiz-Vicente
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Francisco
F
Areces
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Javier
J
Abián-Vicén
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Juan José
JJ
Salinero
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Cristina
C
Gonzalez-Millán
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
César
C
Gallo-Salazar
Exercise Physiology Laboratory,Camilo José Cela University,Madrid 28692,Spain.
Juan
J
Del Coso
D000293:Adolescent; D000328:Adult; D056352:Athletes; D054874:Athletic Performance; D002110:Caffeine / Q000008:administration & dosage* / Q000009:adverse effects; D004311:Double-Blind Method; D061215:Energy Drinks; D005080:Exercise Test; D018737:Hand Strength; D006261:Headache / Q000453:epidemiology / Q000209:etiology; D006801:Humans; D019344:Lactic Acid / Q000097:blood; D008297:Male; D053580:Muscle Strength; D063806:Myalgia / Q000453:epidemiology / Q000209:etiology; D058573:Performance-Enhancing Substances / Q000008:administration & dosage* / Q000009:adverse effects; D015995:Prevalence; D007319:Sleep Initiation and Maintenance Disorders / Q000453:epidemiology / Q000209:etiology; D013030:Spain / Q000453:epidemiology; D064133:Sports Nutritional Physiological Phenomena; D013550:Swimming; D055815:Young Adult
D058573:Performance-Enhancing Substances; D019344:Lactic Acid; D002110:Caffeine
Dietary supplements; Ergogenic aid; Exercise; Nutrition; Sprint; Swimming