Comparison of V[Combining Dot Above]O2peak Performance on a Motorized vs. a Nonmotorized Treadmill

Area of Science:

• Exercise Physiology
• Cardiorespiratory Fitness Assessment
• Sports Science

Background:

• Nonmotorized treadmills (NMTs) are increasingly popular for exercise testing and prescription.
• Limited data exist on physiological and perceptual responses during NMT exercise testing.
• Understanding differences between NMT and motorized treadmill (MT) testing is crucial for accurate exercise prescription.

Purpose of the Study:

• To compare physiological and perceptual responses during peak graded exercise tests (GXTs) on NMTs versus MTs.
• To evaluate differences in maximal oxygen uptake (V[Combining Dot Above]O2peak), heart rate (HR), and rating of perceived exertion (RPE).
• To assess the impact of treadmill type on exercise prescription based on submaximal data.

Main Methods:

• 12 men and 12 women (18-35 years) completed two peak GXT sessions, one on an NMT and one on an MT.
• Respiratory gases, HR, and RPE were collected throughout the tests.
• Peak V[Combining Dot Above]O2, peak HR, ventilatory threshold (VT), time to exhaustion, and peak speed were determined.

Main Results:

• Peak V[Combining Dot Above]O2, peak HR, and VT did not significantly differ between NMT and MT.
• Submaximal V[Combining Dot Above]O2, HR, and RPE were significantly higher on the NMT for a majority of the test stages.
• Time to exhaustion and peak speed were significantly lower on the NMT compared to the MT.

Conclusions:

• While peak exercise performance measures are comparable, submaximal responses during NMT testing differ significantly from MT testing.
• These discrepancies in submaximal data may lead to inaccurate exercise prescriptions if NMT-derived values are directly applied.
• Careful consideration of treadmill type is necessary when interpreting exercise test results and designing training programs.