Can cable-row HIIT train a kayaker’s heart?
In 24 well-trained male kayakers, 8 weeks of resistance-type HIIT and paddling HIIT both improved cardiac function and 500-m performance more than usual paddling; only RHIIT also raised maximum strength.
Source
Effects of a New Form of Resistance-Type High-Intensity Interval Training on Cardiac Structure, Hemodynamics, and Physiological and Performance Adaptations in Well-Trained Kayak Sprint Athletes
Study at a glance
- Design
- RCT — 8-week three-arm RCT in well-trained male kayak sprinters: resistance-type HIIT (RHIIT), paddling HIIT (PHIIT), or usual on-water control
- N
- N=24 · 24 kayakers, age 27±4 years; n=8 per arm
- Population
- Well-trained male kayak sprint athletes
- Outcome
- Cardiac structure/hemodynamics, VO2peak, anaerobic power, 500-m/1000-m paddling, strength, hormones
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Can cable-row HIIT train a kayaker’s heart?
These passages occur verbatim in the stored paper text. They support the points listed below; they do not verify every statement in the explanation.
PHIIT VO2peak change > control (p=0.03).
Change in V . O 2peak in response to PHIIT was significantly greater ( p = 0.03) compared to CON.
Sample and allocation?
Male kayakers ( n = 24, age: 27 ± 4 years) were randomly assigned to one of three 8-wk conditions ( N = 8)
What they did
Randomly assigned 24 kayakers (n=8) to RHIIT (one-armed cable row at 100% vVO2peak), PHIIT (six paddling sets at 100% vVO2peak), or control (1-h on-water paddling at 70–80% HRmax, six sessions/week) for 8 weeks, then retested heart, fitness, and performance.
What they found
All groups improved VO2peak, Qmax, resting SV, LVESd, and 500-m time. PHIIT’s VO2peak gain exceeded control (p=0.03). PHIIT and RHIIT beat control on 500-m (p=0.02 and 0.05) and raised power, SVmax, EDV, EF, testosterone/cortisol, and 1000-m performance. Only RHIIT increased max strength.
The limits
What it doesn't show
n=8 per arm in trained men cannot prove RHIIT is best for women, novices, or race medals; control still trained, so this is not rest vs HIIT.
Key terms
- RHIIT
- Resistance-type high-intensity interval training using one-armed cable row at 100% vVO2peak.
- PHIIT
- Paddling-based HIIT: six sets of kayak paddling at 100% vVO2peak.
- vVO2peak
- Lowest velocity that elicits peak oxygen uptake; used to match interval intensity.
- Stroke volume (SV)
- Blood ejected per beat; resting SV rose in all groups, SVmax in HIIT arms.
- EDV
- End-diastolic volume; increased with PHIIT/RHIIT, aiding VO2peak.
- T/C ratio
- Testosterone/cortisol ratio, an anabolic/catabolic marker that rose after both HIIT types.
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Athletes randomised:
Common questions
How many athletes?
24 male kayakers, 8 per group, mean age 27±4.
How long was training?
8 weeks.
Did PHIIT beat control on VO2peak?
Yes; p=0.03 for the VO2peak change.
What was unique to RHIIT?
Maximum strength increased pre to post.
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