Ramp-incremented and RPE-clamped test protocols elicit similar VO2max values in trained cyclists.
OBJECTIVE
The present study compared the efficacy of ramp incremented and ratings of perceived exertion (RPE)-clamped test protocols for eliciting maximal oxygen uptake (VO2max).


METHODS
Sixteen trained cyclists (age 34 ± 7 years) performed a ramp-incremented protocol and an RPE-clamped protocol 1 week apart in a randomized, counterbalanced order. The RPE-clamped protocol consisted of five, 2-min stages where subjects self-selected work rate and pedal cadence to maintain the prescribed RPE. After completing both test protocols subjects were asked which they preferred.


RESULTS
The mean ± SD test time of 568 ± 72 s in the ramp protocol was not significantly different to the 600 ± 0 s in the RPE-clamped protocol (mean difference = 32 s; p = 0.09), or was the VO2max of 3.86 ± 0.73 L min(-1) in the ramp protocol significantly different to the 3.87 ± 0.72 L min(-1) in the RPE-clamped protocol (mean difference = 0.002 L min(-1); p = 0.97). Furthermore, no significant differences were observed for peak power output (p = 0.21), maximal minute ventilation (p = 0.97), maximal respiratory exchange ratio (p = 0.09), maximal heart rate (p = 0.51), and post-test blood lactate concentration (p = 0.58). The VO2max attained in the preferred protocol was significantly higher than the non-preferred protocol (mean difference = 0.14 L min(-1); p = 0.03).


CONCLUSIONS
The RPE-clamped test protocol was as effective as the ramp-incremented protocol for eliciting VO2max and could be considered as a valid alternative protocol, particularly where a fixed test duration is desirable.
Human Physiology Laboratory, Marywood University, 2300 Adams Avenue, Scranton, PA, 18509, USA.
Allison M
AM
Straub
Adrian W
AW
Midgley
Gerald S
GS
Zavorsky
Angela R
AR
Hillman
D000328:Adult; D015308:Anaerobic Threshold; D056352:Athletes; D001642:Bicycling / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D005082:Physical Exertion