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Physiological responses to two wheelchair-racing exercise protocols.

R A Cooper1, F D Baldini, M L Boninger

  • 1Department of Rehabilitation Science and Technology, University of Pittsburgh, Pennsylvania, USA. rcooper@pitt.edu

Neurorehabilitation and Neural Repair
|April 12, 2002
PubMed
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Wheelchair athletes experienced higher blood lactate accumulation during speed workouts compared to resistance workouts. This finding highlights differences in physiological responses to various training protocols for elite track athletes with spinal cord injuries.

Area of Science:

  • Sports Medicine
  • Exercise Physiology
  • Rehabilitation Science

Background:

  • Exercise increases metabolic demand, leading to blood lactate accumulation.
  • Training adaptations can improve lactate clearance and tolerance during aerobic exercise.
  • Understanding lactate response is crucial for optimizing wheelchair athlete training.

Purpose of the Study:

  • To investigate blood lactate accumulation in elite male wheelchair track athletes.
  • To compare lactate responses between two distinct wheelchair-racing protocols: speed and resistance.
  • To inform training strategies for athletes with spinal cord injuries.

Main Methods:

  • Eleven elite male wheelchair track athletes with spinal cord injuries participated.
  • Exercise tests were conducted using a computer-monitored wheelchair dynamometer.

Related Experiment Videos

  • Athletes completed randomized speed and resistance workouts, with blood lactate measured pre- and post-exercise.

    • Main Results:

    • Blood lactate concentrations increased significantly following both protocols.
    • The mean increase in blood lactate was higher during speed workouts (11.67 +/- 4.69 mM) compared to resistance workouts (8.56 +/- 4.42 mM).
    • A statistically significant difference was observed in blood lactate responses between the two protocols.

    Conclusions:

    • Blood lactate accumulation differs significantly between speed and resistance wheelchair-racing protocols.
    • Speed workouts elicit a greater blood lactate response than resistance workouts in this athlete population.
    • These findings suggest that training intensity and type influence metabolic stress in wheelchair athletes.