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Related Concept Videos

Wald-Wolfowitz Runs Test II01:17

Wald-Wolfowitz Runs Test II

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Related Experiment Video

Updated: Jul 13, 2026

Traditional Trail Making Test Modified into Brand-new Assessment Tools: Digital and Walking Trail Making Test
08:07

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Published on: November 23, 2019

Validity of the modified Conconi running test.

D Sentija1, V Vucetic, G Markovic

  • 1Department of Kinesiology of Sport, Faculty of Kinesiology, University of Zagreb, Zagreb, Croatia.

International Journal of Sports Medicine
|July 7, 2007
PubMed
Summary

A fast ramp treadmill test is valid for determining the heart rate deflection point (HRdp) in trained runners. However, the speed at deflection (Sdp) is protocol-dependent, requiring caution for practical application.

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Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Cardiovascular Physiology

Background:

  • The heart rate deflection point (HRdp) is a physiological marker used in exercise testing.
  • Accurate determination of HRdp is crucial for training prescription in athletes.
  • Treadmill protocols vary, potentially influencing HRdp and speed at deflection (Sdp) measurements.

Purpose of the Study:

  • To evaluate the validity of a fast ramp treadmill protocol for measuring HRdp and Sdp in trained runners.
  • To compare results from a fast ramp protocol with a standard ramp protocol.
  • To assess the reliability and potential biases of the fast ramp protocol for these physiological markers.

Main Methods:

  • Fifty-one trained male runners completed both a standard (30-s increments) and a fast (15-s increments) incremental treadmill test to exhaustion.
  • Continuous heart rate monitoring was performed during both protocols.
  • Statistical analyses included t-tests, correlation coefficients, and limits of agreement to compare HRdp and Sdp between protocols.

Main Results:

  • The fast ramp protocol yielded highly correlated and similar heart rate deflection point (HRdp) values compared to the standard protocol (r=0.92, p<0.001).
  • Speed at deflection (Sdp) was also highly correlated (r=0.91, p<0.001) but significantly higher in the fast ramp protocol.
  • No systematic bias was found for HRdp, but a systematic bias was observed for Sdp in the fast ramp protocol.

Conclusions:

  • A fast ramp treadmill protocol is a valid method for determining the heart rate deflection point (HRdp) in trained runners.
  • The speed at deflection (Sdp) is influenced by the ramp protocol's speed increment.
  • Care should be taken when applying Sdp values obtained from fast ramp protocols due to protocol dependency.