Çırak Y1, Elbaşı N1, Bırık B1, Tütüneken YE1
1Istinye University, Physiotherapy and Rehabilitation, Istanbul, Turkey
Background: High-intensity interval training (HIT), which involves alternating bouts of intensive exercise with low-intensity recovery periods, is considered one of the most effective means of improving cardiorespiratory and metabolic function. HIT has been proposed as a time-efficient alternative to traditional cardiorespiratory exercise training, but it is very fatiguing. Recent studies have demonstrated that modifying the "classic" 6 × 30-s "all-out" sprint interval training protocol by incorporating either shorter sprints (6 × 10-s or 15-s sprints) or fewer sprints (e.g., 2 × 20-s sprints; reduced-exertion high-intensity interval training (REHIT)) does not attenuate the training-induced improvements in maximal aerobic capacity.
Purpose: The aim of this study is to determine the effectiveness of REHIT on cardiopulmonary fitness and body composition in young women adults with obesity compared to traditional moderate volume continuous exercise (TE).
Methods: Twenty-four obese young adult aged 18-22 were randomly allocated into either the TE or REHIT group. The ET group performed a 30 to 60-minute continuous exercise at 60% of the peak heart rate (HR). The REHIT group training performed 6 sets of 15-s sprint at 100% of the peak velocity interspersed by a 3-min active recovery period at 50% of the exercise velocity. At baseline and after 12 weeks of intervention, cardiopulmonary fitness and body composition parameters: BMI, fat mass (%), waist circumference, fat free mass were assessed.
Results: The VO2 peak (TE: 10.1%; REHIT: 18.6%) were significantly increased in both groups after the intervention. Additionally, the total time of exercise (TE: 14.5%; REHIT: 19.4%) were significantly improved across interventions. But REHIT resulted in greater improvement of cardiopulmonary fitness (VO2max) (MD 1.97, 95% CI 0.82, 2.99, p 0.001; 20,3%) and a greater reduction of % body fat (MD -2.15, 95% CI -3.80,-0.21,p=0.01, 15,8%) compared to traditional exercise. Also there was significant difference between groups for the BMI difference p=0.03.
Conclusion(s): Reduced exertion high intensity training is superior to improve cardiopulmonary fitness and to reduce %body fat in young women adults with obesity compared to traditional exercise.
Implications: Itis still unclear which type of exercise is capable of eliciting the greatest health benefits to obese people. So this study is to provide some evidence for the alternative exercise training programs to treating obese people.
Keywords: reduced-exertion high-intensity interval training, obesity, body composition
Funding acknowledgements: Our study was unfunded. There is no funding source that supported our work.
Purpose: The aim of this study is to determine the effectiveness of REHIT on cardiopulmonary fitness and body composition in young women adults with obesity compared to traditional moderate volume continuous exercise (TE).
Methods: Twenty-four obese young adult aged 18-22 were randomly allocated into either the TE or REHIT group. The ET group performed a 30 to 60-minute continuous exercise at 60% of the peak heart rate (HR). The REHIT group training performed 6 sets of 15-s sprint at 100% of the peak velocity interspersed by a 3-min active recovery period at 50% of the exercise velocity. At baseline and after 12 weeks of intervention, cardiopulmonary fitness and body composition parameters: BMI, fat mass (%), waist circumference, fat free mass were assessed.
Results: The VO2 peak (TE: 10.1%; REHIT: 18.6%) were significantly increased in both groups after the intervention. Additionally, the total time of exercise (TE: 14.5%; REHIT: 19.4%) were significantly improved across interventions. But REHIT resulted in greater improvement of cardiopulmonary fitness (VO2max) (MD 1.97, 95% CI 0.82, 2.99, p 0.001; 20,3%) and a greater reduction of % body fat (MD -2.15, 95% CI -3.80,-0.21,p=0.01, 15,8%) compared to traditional exercise. Also there was significant difference between groups for the BMI difference p=0.03.
Conclusion(s): Reduced exertion high intensity training is superior to improve cardiopulmonary fitness and to reduce %body fat in young women adults with obesity compared to traditional exercise.
Implications: Itis still unclear which type of exercise is capable of eliciting the greatest health benefits to obese people. So this study is to provide some evidence for the alternative exercise training programs to treating obese people.
Keywords: reduced-exertion high-intensity interval training, obesity, body composition
Funding acknowledgements: Our study was unfunded. There is no funding source that supported our work.
Topic: Cardiorespiratory; Primary health care; Outcome measurement
Ethics approval required: Yes
Institution: Cyprus Science University
Ethics committee: Cyprus Science University Ethics Committee
Ethics number: 8
All authors, affiliations and abstracts have been published as submitted.
