%VO2max versus %HRmax regressions for six modes of exercise

Area of Science:

• Exercise Physiology
• Cardiorespiratory Fitness

Background:

• Understanding the relationship between oxygen consumption (VO2max) and heart rate (HRmax) is crucial for exercise prescription.
• Previous research has explored this relationship, but comparisons across various exercise modalities are limited.

Purpose of the Study:

• To compare the regression equations of %VO2max versus %HRmax across six different exercise modes.
• To determine if exercise mode influences the established relationship between maximal oxygen uptake and maximal heart rate.

Main Methods:

• Ten active males underwent incremental exercise tests to exhaustion on a treadmill, cycle ergometer, skier, shuffle skier, stepper, and rower.
• Oxygen consumption (VO2) and heart rate (HR) were measured at each exercise increment.
• Regression analyses were conducted using SAS-GLM to compare %VO2max-%HRmax equations.

Main Results:

• Regression equations for treadmill, skier, shuffle skier, and stepper were not significantly different.
• Cycling showed a lower intercept and higher slope compared to other modes.
• Rowing exhibited a higher intercept and lower slope than the other exercise modes.

Conclusions:

• Weight-bearing exercise modes demonstrate similar %VO2max-%HRmax regression equations.
• Weight-supported and arm-dominant exercise modes, such as cycling and rowing, appear to have distinct %VO2max-%HRmax regressions.
• These findings suggest that exercise mode should be considered when applying generalized %VO2max-%HRmax relationships.