Hyperventilation as a stretegy for improved performance of intermittent high-intensity exercise

2014 Fiscal Year Final Research Report

• Project/Area Number: 25750333
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Sports science
• Research Institution: Juntendo University
• Principal Investigator: SAKAMOTO Akihiro 順天堂大学, スポーツ健康科学部, ポスドク (70615434)
• Project Period (FY): 2013-04-01 – 2015-03-31
• Keywords: 呼吸性アルカローシス / 筋疲労 / 中枢疲労 / パワー / EMG

Outline of Final Research Achievements

During repeated sets of high-intensity exercise, the accumulation of hydrogen ions (and the resulting intramuscular acidosis) is a main mechanism for muscle fatigue. This study investigated whether hyperventilation (HV)-induced respiratory alkalosis, implemented during inter-set recovery would attenuate the performance decrement associated with fatigue.

HV has been found to be effective in attenuating performance decrement during repeated short pedaling sprints and resistance training (bench press & leg press). The effectiveness of HV however varied depending on the duration of HV, the types of exercise and the level of acidosis incurred during the exercise. If these conditions are not appropriate, one may lose performance due to the negative effects of HV such as impaired hemodynamics in the periphery and the brain. Further research is warranted to clarify ideal conditions for miximized or consistent efficacy of HV.

Free Research Field

運動生理学