title: Repeated high intensity bouts with long recovery: are bicarbonate or carbohydrate supplements an option?
abstract: The effects of varying recovery modes and the influence of preexercise sodium bicarbonate and carbohydrate ingestion on repeated high intensity performance, acid-base response, and recovery were analyzed in 12 well-trained males. They completed three repeated high intensity running bouts to exhaustion with intervening recovery periods of 25 min under the following conditions: sodium bicarbonate, active recovery (BIC); carbohydrate ingestion, active recovery (CHO); placebo ingestion, active recovery (ACTIVE); placebo ingestion, passive recovery (PASSIVE). Blood lactate (BLa), blood gases, heart rate, and time to exhaustion were collected. The three high intensity bouts had a duration of 138 ± 9, 124 ± 6, and 121 ± 6 s demonstrating a decrease from bout 1 to bout 3. Supplementation strategy had no effect on performance in the first bout, even with differences in pH and bicarbonate (HCO3(-)). Repeated sprint performance was not affected by supplementation strategy when compared to ACTIVE, while PASSIVE resulted in a more pronounced decrease in performance compared with all other interventions. BIC led to greater BLa, pH, and HCO3(-) values compared with all other interventions, while for PASSIVE the opposite was found. BLa recovery was lowest in PASSIVE; recovery in pH, and HCO3(-) was lower in PASSIVE and higher in BIC.
authors.affiliation: Department of Sport Science and Kinesiology, University of Salzburg, Schlossallee 49, 5400 Hallein/Rif, Austria ; Swedish Winter Sports Research Centre, Department of Health Sciences, Mid-Sweden University, Studentplan 4, 83140 Östersund, Sweden.
authors.forename: Thomas
authors.initials: T
authors.lastname: Stöggl
authors.affiliation: Department of Physical Education, University of Las Palmas de Gran Canaria, C/Juan de Quesada, No. 30 35001 Las Palmas de Gran Canaria, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Torres-Peralta
authors.affiliation: Gazi University School of Physical Education and Sports, Gazi University, Teknikokullar, 06500 Ankara, Turkey.
authors.forename: Ebru
authors.initials: E
authors.lastname: Cetin
authors.affiliation: Department of Health Science, Faculty of Psychological and Physical Science, Aichi Gakuin University, 12 Araike, Iwasaki-cho, Nisshin, Aichi 470-0915, Japan.
authors.forename: Masaru
authors.identifier: 0000-0002-9709-8352
authors.initials: M
authors.lastname: Nagasaki
mesh_terms: D000328:Adult; D054874:Athletic Performance / Q000502:physiology*; D001639:Bicarbonates / Q000008:administration & dosage*; D002241:Carbohydrates / Q000008:administration & dosage; D004040:Dietary Carbohydrates / Q000008:administration & dosage*; D019587:Dietary Supplements; D006801:Humans; D008297:Male; D010807:Physical Endurance / Q000187:drug effects / Q000502:physiology*; D005082:Physical Exertion / Q000187:drug effects / Q000502:physiology; D012420:Running / Q000502:physiology; D013997:Time Factors
chemical_list: D001639:Bicarbonates; D002241:Carbohydrates; D004040:Dietary Carbohydrates