Key result
Paddling-based high-intensity interval training boosts VO2peak by ~12% versus traditional endurance paddling in sprint athletes.
Why the study?
The effects of resistance-type high-intensity interval training matched with the lowest velocity eliciting VO2peak on cardiac structure, hemodynamics, and physiological adaptations in well-trained kayak sprint athletes were unknown.
Does resistance-type high-intensity interval training improve cardiac structure, hemodynamics, and performance in well-trained kayak sprint athletes?
RCT (n=24)
Single-blind
Randomized
No
Does resistance-type high-intensity interval training improve cardiac structure, hemodynamics, and performance in well-trained kayak sprint athletes?
Absolute Event Rate: 12.3% vs 5.1%
p-value: p=0.03
Resistance-type high-intensity interval training improves cardiac structure, hemodynamics, and performance similarly to paddling-based HIIT, while additionally enhancing muscular strength in well-trained kayak sprint athletes.
Supports paddling-based HIIT over endurance training for VO2peak gains in kayak athletes; extends sport-specific HIIT evidence in well-trained athletes.
This study examined the effects of a resistance-type high-intensity interval training (RHIIT) matched with the lowest velocity that elicited V. O 2peak (100% v V. O 2peak ) in well-trained kayak sprint athletes. Responses in cardiac structure and function, cardiorespiratory fitness, anaerobic power, exercise performance, muscular strength, and hormonal adaptations were examined. Male kayakers ( n = 24, age: 27 ± 4 years) were randomly assigned to one of three 8-wk conditions ( N = 8): (RHIIT) resistance training using one-armed cable row at 100% v V. O 2peak ; paddling-based HIIT (PHIIT) six sets of paddling at 100% v V. O 2peak ; or controls (CON) who performed six sessions including 1-h on-water paddling/sessions at 70–80% maximum HR per week. Significant increases ( p < 0.05) in V. O 2peak , v V. O 2peak , maximal cardiac output, resting stroke volume, left ventricular end-systolic dimension, 500-m paddling performance were seen pre- to post-training in all groups. Change in V. O 2peak in response to PHIIT was significantly greater ( p = 0.03) compared to CON. Also, 500-m paddling performance changes in response to PHIIT and RHIIT were greater ( p = 0.02, 0.05, respectively) than that of CON. Compared with pre-training, PHIIT and RHIIT resulted in significant increases in peak and average power output, maximal stroke volume, end-diastolic volume, ejection fraction, total testosterone, testosterone/cortisol ratio, and 1,000-m paddling performance. Also, the change in 1,000-m paddling performance in response to PHIIT was significantly greater ( p = 0.02) compared to that of CON. Moreover, maximum strength was significantly enhanced in response to RHIIT pre- to post-training ( p < 0.05). Overall, RHIIT and PHIIT similarly improve cardiac structure and hemodynamics, physiological adaptations, and performance of well-trained kayak sprint athletes. Also, RHIIT enhances cardiorespiratory fitness and muscular strength simultaneously.
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Sheykhlouvand et al. (2022) conducted an RCT in Healthy well-trained kayak sprint athletes (n=24). Paddling-based high-intensity interval training (PHIIT) vs. Traditional on-water paddling (6 sessions per week at 70-80% HRmax) was evaluated on Change in VO2peak (p=0.03). Paddling-based high-intensity interval training significantly increased VO2peak by 12.3% compared to a 5.1% increase with traditional endurance paddling in well-trained kayak sprint athletes.
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