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Cardiovascular stress in isokinetic trunk strength test
P Rantanen1, E Penttinen, S Rinta-Kauppila
1Paavo Nurmi Center, Sports Medical Research Unit, University of Turku, Finland.
Spine
|February 15, 1995
Summary
Cardiovascular capacity limits performance in high-velocity isokinetic trunk strength tests. Heart rate monitoring during these tests can help estimate exertion levels, especially for patients with cardiac concerns.
Area of Science:
- Exercise Physiology
- Cardiovascular Health
- Musculoskeletal Rehabilitation
Background:
- Study involved 31 women with low back or neck pain undergoing physical reconditioning.
- Participants acted as their own controls in an experimental design.
Purpose of the Study:
- To assess the cardiovascular stress induced by isokinetic trunk extension-flexion strength testing.
- To compare cardiovascular responses between trunk strength tests and traditional bicycle ergometer tests.
Main Methods:
- Isokinetic trunk strength was measured at three angular velocities.
- Heart rate and power output were recorded during trunk strength tests and a graded submaximal bicycle ergometer test.
- Power output at maximal age-predicted heart rate was estimated using both testing methods.
Main Results:
- Torque decreased, while heart rate and power output increased with higher angular velocities (P < 0.0001).
- Cardiovascular responses during high-velocity isokinetic trunk testing were comparable to submaximal bicycle ergometer tests.
- A strong correlation (0.76) was found between power output estimations from both testing modalities.
Conclusions:
- Cardiovascular capacity is a key determinant of performance in high-velocity isokinetic trunk strength testing.
- Heart rate monitoring can quantify exertion during isokinetic trunk strength tests.
- Special consideration is needed for patients with suspected heart conditions undergoing such assessments.