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Acute and Short-Term Response to Different Loading Conditions During Resisted Sprint Training
Summary
Higher loads in resisted sprint training increase physical impairments and metabolic response, but sprint performance fully recovers within 24 hours regardless of load. This study analyzed resisted sprint training responses.
Area of Science:
- Sports Science
- Exercise Physiology
- Biomechanics
Background:
- Resisted sprint training is a common method to enhance sprint performance.
- Understanding the dose-response relationship between load and physiological/performance outcomes is crucial for effective training prescription.
Purpose of the Study:
- To analyze the acute and short-term physical and metabolic responses to resisted sprint training.
- To compare responses across five different loading conditions (0%, 20%, 40%, 60%, and 80% body mass).
Main Methods:
- Fifteen male participants completed 8 × 20-m sprints with 2-minute rests.
- Measurements included creatine kinase, lactate, countermovement jump, 20-m sprint, and isokinetic knee contractions.
- Data collected pre-exercise, immediately post-exercise, and 24 hours post-exercise.
Main Results:
- Increased blood lactate and creatine kinase concentrations were observed with all loads, with higher loads yielding greater lactate responses.
- Countermovement jump height decreased post-exercise for all loads.
- Sprint performance showed temporary decrements, particularly at 0% and 80% loads, but recovered by 24 hours, except for a minor impairment in knee flexion at 20% load.
Conclusions:
- Higher loads during resisted sprint training lead to greater physical performance impairments and metabolic stress.
- Despite acute impairments, full recovery of sprint performance is achieved within 24 hours across all tested loading conditions.
- Training prescription should consider the trade-off between training stimulus and acute performance decrements.
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