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Modality-Specific Heart Rate Differences at Ventilatory Thresholds During Unified Ramp Testing
Sponsor: Cathay General Hospital
Summary
The purpose of this study was to investigate the heart rate bias between cycling and treadmill exercise at ventilatory thresholds. This was a randomized crossover trial involving 23 healthy participants. Each participant performed both cycling and treadmill exercise tests in a randomized order. The primary outcome was to determine the difference in heart rate response at the first and second ventilatory thresholds between the two exercise modalities. We hypothesized that there is a fixed bias in heart rate response, which may have implications for exercise prescription in clinical and rehabilitation settings.
Official title: Evaluation of Heart Rate and Ventilatory Threshold Agreement Between Cycling and Running Under Strictly Standardized Ramp Conditions
Key Details
Gender
All
Age Range
20 Years - Any
Study Type
INTERVENTIONAL
Enrollment
23
Start Date
2024-02-01
Completion Date
2024-11-30
Last Updated
2026-07-22
Healthy Volunteers
Yes
Conditions
Interventions
Cycle Ergometer CPET
Following a 3-minute unloaded warm-up (0 W), continuous ramp increases began at 20 W/min for men or 15 W/min for women, targeting an 8-12 minute test duration to volitional exhaustion.
Motorized Treadmill CPET (Porszász Protocol)
Standardized ramp testing utilizing the Porszász algorithm. Simultaneous adjustments to speed and grade mathematically produce a linear rise in metabolic demand (matched to 20 or 15 W/min based on sex), ensuring identical oxygen uptake kinetic demands to the cycling protocol.
Locations (1)
Cathay General Hospitla
Taipei, Taipei City, Taiwan