A Hydrothermally Processed Maize Starch and Its Effects on Blood Glucose Levels During High-Intensity Interval
Megan M Hetrick1, Mildred R Naquin, Wynn W Gillan
1Department of Kinesiology and Health Studies, Southeastern Louisiana University, Hammond, Louisiana.
Journal of Strength and Conditioning Research
|February 25, 2017
Summary
Hydrothermally processed maize starch (HPMS) does not alter blood glucose levels during high-intensity interval exercise. Sprint interval cycling (SIC) may be a viable exercise option for individuals managing blood glucose levels.
Area of Science:
- Exercise Physiology
- Nutritional Biochemistry
- Sports Science
Background:
- High-intensity interval training (HIIT) offers health benefits but requires careful consideration of metabolic responses.
- Hydrothermally processed maize starch (HPMS) has previously demonstrated an ability to moderate blood glucose and insulin during endurance exercise.
- Sprint interval cycling (SIC) is a specific form of HIIT characterized by short bursts of intense cycling interspersed with rest periods.
Purpose of the Study:
- To investigate the effects of HPMS on blood glucose and metabolic stress during SIC in healthy individuals.
- To compare blood glucose responses during SIC with and without HPMS ingestion.
- To establish whether HPMS influences the acute glycemic response to a high-intensity interval exercise protocol.
Main Methods:
- Four sessions were conducted per participant: preliminary, SIC with HPMS, SIC without HPMS, and a control (HPMS only).
- Measurements included blood glucose, blood lactate, respiratory exchange ratio, oxygen consumption, and rating of perceived exertion.
- Blood glucose was monitored after each sprint interval during the SIC sessions.
Main Results:
- A significant, progressive increase in blood glucose was observed during each cycling sprint in both exercise conditions.
- No significant difference in blood glucose response was found between SIC sessions with and without HPMS.
- This study is the first to report blood glucose responses to SIC after individual sprint intervals.
Conclusions:
- Ingestion of HPMS does not appear to affect blood glucose responses during SIC in healthy individuals.
- SIC may be a beneficial exercise modality for individuals at risk of glucose excursions, with careful monitoring.
- Further research could explore modifying SIC parameters (number, intensity, duration of sprints) to manage blood glucose levels effectively.
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