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Published on: January 28, 2020
Inspiratory loading intensity does not influence lactate clearance during recovery
Michael A Johnson1, Dean E Mills, David M Brown
1Sport, Health and Performance Enhancement Research Group, School of Science and Technology, Nottingham Trent University, Clifton, Nottingham, United Kingdom. Michael.johnson@ntu.ac.uk
Inspiratory muscle training did not improve lactate clearance or acid-base balance post-exercise in moderately trained individuals. These findings suggest inspiratory loading does not aid recovery from maximal exertion.
Area of Science:
- Exercise Physiology
- Sports Science
- Human Physiology
Background:
- Maximal exercise leads to metabolic disturbances, including lactate accumulation and acid-base imbalance.
- Recovery strategies aim to restore homeostasis efficiently.
- Inspiratory muscle loading is a potential intervention to influence recovery.
Purpose of the Study:
- To investigate the impact of varying pressure threshold inspiratory loads on lactate clearance.
- To assess the effects of inspiratory loading on plasma acid-base balance during recovery from maximal exercise.
Main Methods:
- Eight moderately trained males completed maximal incremental cycling tests.
- Recovery involved passive rest or breathing against inspiratory loads (10, 15, or 20 cm H2O).
- Plasma lactate concentration and acid-base balance were measured using the physicochemical approach.
Main Results:
- No significant differences in peak exercise responses were observed between trials.
- Lactate clearance and final lactate concentrations were similar across passive recovery and all inspiratory loading conditions.
- Changes in strong ion difference, weak acid concentration, and partial pressure of carbon dioxide did not differ.
Conclusions:
- Inspiratory loading at the tested intensities does not accelerate lactate clearance in moderately trained individuals.
- Inspiratory loading does not alter plasma acid-base balance during recovery from maximal exercise.
- These findings suggest limited efficacy of this specific inspiratory loading strategy for post-exercise recovery.
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