Case Report: Heat Suit Training May Increase Hemoglobin Mass in Elite Athletes

The present case report aimed to investigate the effects of exercise training in temperate ambient conditions while wearing a heat suit on hemoglobin mass (Hbmass). As part of their training regimens, 5 national-team members of endurance sports (3 males) performed ∼5 weekly heat suit exercise traini...

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Bibliographic Details
Published in:International journal of sports physiology and performance 2022-01, Vol.17 (1), p.115-119
Main Authors: Rønnestad, Bent R, Hansen, Joar, Bonne, Thomas C, Lundby, Carsten
Format: Article
Language:English
Subjects:
Athletes
Case reports
Fitness training programs
Heat
Hemoglobin
Hemoglobins - analysis
Hot Temperature
Humans
Male
Physical Conditioning, Human
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Summary:The present case report aimed to investigate the effects of exercise training in temperate ambient conditions while wearing a heat suit on hemoglobin mass (Hbmass). As part of their training regimens, 5 national-team members of endurance sports (3 males) performed ∼5 weekly heat suit exercise training sessions each lasting 50 minutes for a duration of ∼8 weeks. Two other male athletes acted as controls. After the initial 8-week period, 3 of the athletes continued for 2 to 4 months with ∼3 weekly heat sessions in an attempt to maintain acquired adaptations at a lower cost. Hbmass was assessed in duplicate before and after intervention and maintenance period based on automated carbon monoxide rebreathing. Heat suit exercise training increased rectal temperature to a median value of 38.7°C (range 38.6°C-39.0°C), and during the initial ∼8 weeks of heat suit training, there was a median increase of 5% (range 1.4%-12.9%) in Hbmass, while the changes in the 2 control athletes were a decrease of 1.7% and an increase of 3.2%, respectively. Furthermore, during the maintenance period, the 3 athletes who continued with a reduced number of heat suit sessions experienced a change of 0.7%, 2.8%, and -1.1%, indicating that it is possible to maintain initial increases in Hbmass despite reducing the weekly number of heat suit sessions. The present case report illustrates that heat suit exercise training acutely raises rectal temperature and that following 8 weeks of such training Hbmass may increase in elite endurance athletes.
ISSN:1555-0265
1555-0273
DOI:10.1123/ijspp.2021-0033