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J Int Soc Sports Nutr. 2019 Oct 17;16(1):44. doi: 10.1186/s12970-019-0313-8.

Caffeine and sodium bicarbonate supplementation alone or together improve karate performance.

Author information

1
Physical Education and Sport Sciences Department, Faculty of Humanities, Tarbiat Modares University, Tehran, Iran.
2
Department of exercise physiology, Faculty of Physical education and sport sciences, Kharazmi University, Tehran, Iran. akbari.kazem1982@gmail.com.
3
Raad Sports Club, Tehran, Iran. akbari.kazem1982@gmail.com.
4
College of Health and Human Sciences, Charles Darwin University, Darwin, Australia.
5
Faculty of Physical education and sport sciences, Department of Exercise Physiology, Karaj Branch, Islamic Azad University, Karaj, Iran.
6
Aspetar, Qatar Orthopaedic and Sports Medicine Hospital, Doha, Qatar.
7
School of Nutrition and Dietetics, Acadia University, Wolfville, Nova Scotia, Canada.
8
Sport Medicine Center, Oxygen Sport Group, Tehran, Iran.
9
Department of Kinesiology, Jacksonville State University, Jacksonville, AL, 36265, USA.
10
Sports Physiology Department, Islamic Azad University, Boroujerd Branch, Boroujerd, Iran.

Abstract

BACKGROUND:

The ergogenic properties of acute caffeine (CAF) and sodium bicarbonate (NaHCO3) ingestion on athletic performance have been previously investigated. However, each sport has unique physiological and technical characteristics which warrants optimizing supplementations strategies for maximizing performance. This study examined the effects of CAF and NaHCO3 ingestion on physiological responses and rate of perceived exertion during a Karate-specific aerobic test (KSAT) in competitive karatekas.

METHODS:

In a double-blind, crossover, randomized placebo-controlled trial, eight Karatekas underwent five experimental conditions including control (CON), placebo (PLA), CAF, NaHCO3, and CAF + NaHCO3 before completing KSAT. Capsules containing 6 mg/kg BW CAF were consumed 50 min prior to a KSAT whilst 0.3 g/kg BW NaHCO3 was consumed for 3 days leading to and 120, 90, and 60 min prior to a KSAT. Time to exhaustion (TTE), rate of perceived exertion (RPE), and blood lactate (BL) were measured before, immediately after and 3 min following KSAT.

RESULTS:

TTE was significantly greater following CAF, NaHCO3, and CAF + NaHCO3 consumption compared to PLA and CON. However, the differences between CAF, NaHCO3, and CAF + NaHCO3 were not statistically significant (p > 0.05). BL increased significantly from baseline to immediately after and 3 min following KSAT in all conditions (p < 0.01), while RPE at the end of KSAT was not significantly different between conditions (p = 0.11).

CONCLUSIONS:

Karate practitioners may benefit from the ergogenic effects of CAF and NaHCO3 when consumed separately or together.

KEYWORDS:

Blood lactate; Caffeine; Ergogenic aid; Karate; Karate-specific aerobic test; Rate of perceived exertion; Sodium bicarbonate; Time to exhaustion

PMID:
31623659
PMCID:
PMC6798418
DOI:
10.1186/s12970-019-0313-8
[Indexed for MEDLINE]
Free PMC Article

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