Key result
High-intensity interval training improved cardiovascular endurance by 25.6% compared to 18.1% with continuous endurance training in teenage sports players.
Why the study?
The study was conducted to compare high-intensity interval training versus continuous endurance training on physical fitness, biochemical, and haematological parameters in teenage athletes.
Does high-intensity interval training or continuous endurance training improve physical fitness and blood parameters in teenage sports players?
RCT (n=45)
Randomized
No
Does high-intensity interval training or continuous endurance training improve physical fitness and blood parameters in teenage sports players?
Absolute Event Rate: 25.6% vs 18.1%
Both HIIT and continuous endurance training significantly improve health-related fitness in teenage athletes, with HIIT favoring cardiovascular endurance and flexibility, and CET favoring muscular endurance.
Supports HIIT for cardiovascular and CET for muscular endurance goals in teen athletes; extends RCT evidence on modality-specific fitness gains in youth.
The study compared different training modalities, such as high-intensity interval training versus continuous endurance training, on selected health-related physical fitness, biochemical and haematological parameters of teenage players yielding similar mechanical work and training duration. A random sampling technique was employed and affirmed by the Ethical Committee of Sichuan Province, China. Forty-five teenage sports players aging 18–19 from Sichuan Province, China, were categorized into two experimental and one control group (n = 15) subjects. The groups were allocated separately to high-intensity interval training, continuous endurance training, and control group for a three-month physical exercise program. Each group’s training intensity was set based on the resting heart rate, to assess the effects on health-related physical fitness using fitness gram variables such as cardiovascular endurance, muscular endurance, and flexibility. Biochemical and haematological fasting blood samples were taken and tested at baseline and post three months of training. Detailed descriptive statistics were carried out for the interpretation of the data. All the statistical analysis was completed using the IBM SPSS 20. Paired t-test and one-way ANCOVA were used to evaluate the effect of two aerobic training methods, and to determine the exact difference between the groups, Scheffe’s post hoc test was employed. The result of the study shows that cardiovascular endurance in HIIT showed a better performance of (25.6%) than in C.E.T. (18.1%). Regarding muscular endurance, C.E.T. achieved 19.6% and HIIT 16.2%. For flexibility, HIIT improved by (6.5%) while C.E.T. (5.8%). Accordingly, the study revealed significant changes in teenage sports players’ health-related fitness, biochemical and haematological parameters.
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Chen et al. (2022) conducted an RCT in Healthy teenage sports players (n=45). High-intensity interval training (HIIT) vs. Continuous endurance training (CET) and control was evaluated on Cardiovascular endurance improvement. High-intensity interval training improved cardiovascular endurance by 25.6% compared to 18.1% with continuous endurance training in teenage sports players.
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