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Related Experiment Videos

Cardiovascular response to isokinetic endurance exercise testing.

S Vinson1, B Lindsay, P Mettler

  • 1Southwest Texas State University, San Marcos.

The Journal of Sports Medicine and Physical Fitness
|March 1, 1990
PubMed
Summary

The Cybex endurance test significantly elevates maximal heart rate (MHR) and pressure rate product (PRP) compared to graded exercise tests (GXT), highlighting its cardiovascular demands.

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Area of Science:

  • Exercise Physiology
  • Cardiovascular Response
  • Sports Science

Background:

  • Cardiovascular responses during exercise are critical indicators of physical exertion and health.
  • Isokinetic dynamometers like Cybex are used for strength and endurance testing.
  • Graded exercise tests (GXT) are standard for assessing cardiovascular fitness.

Purpose of the Study:

  • To compare cardiovascular responses, including maximal heart rate (MHR), systolic blood pressure (SBP), diastolic blood pressure (DBP), and pressure rate product (PRP), between Cybex isokinetic endurance tests and maximal graded exercise tests (GXT).

Main Methods:

  • Nine untrained college females participated.
  • Subjects completed a Bruce GXT and a maximal effort Cybex knee endurance test.
  • Independent t-tests analyzed differences in MHR, SBP, DBP, and PRP between the two tests.

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Main Results:

  • No significant differences were found in SBP and DBP between the Cybex and GXT.
  • MHR was significantly higher during the GXT, with Cybex values at 71-88% of GXT values.
  • PRP was significantly lower during Cybex exercise, ranging from 58-102% of maximal GXT values.

Conclusions:

  • Cybex endurance tests impose significant cardiovascular demands on healthy individuals.
  • Careful evaluation and monitoring of cardiovascular parameters are essential for clients of all ages and diagnoses during Cybex testing.