Ice slurry ingestion increases core temperature capacity and running time in the heat.

@article{Siegel2010IceSI,
  title={Ice slurry ingestion increases core temperature capacity and running time in the heat.},
  author={Rodney Siegel and Joseph Mat{\'e} and Matt B Brearley and Greig Watson and Kazunori Nosaka and Paul B. Laursen},
  journal={Medicine and science in sports and exercise},
  year={2010},
  volume={42 4},
  pages={
          717-25
        }
}
PURPOSE To investigate the effect of ice slurry ingestion on thermoregulatory responses and submaximal running time in the heat. [] Key MethodMETHODS On two separate occasions, in a counterbalanced order, 10 males ingested 7.5 g·kg(-1) of either ice slurry (-1°C) or cold water (4°C) before running to exhaustion at their first ventilatory threshold in a hot environment (34.0°C ± 0.2°C, 54.9% ± 5.9% relative humidity).

Figures from this paper

Pre-cooling with ice slurry ingestion leads to similar run times to exhaustion in the heat as cold water immersion

As run times were similar between conditions, ice slurry ingestion may be a comparable form of pre-cooling to cold water immersion on submaximal running time in the heat.

Comparison of the effects of cold water and ice ingestion on endurance cycling capacity in the heat

Ice ingestion with a long rest interval increases the endurance exercise capacity and reduces the core temperature in the heat

Internal pre-cooling by ice ingestion with a long rest interval had the greatest benefit on exercise capacity in the heat, which is suggested to be driven by a reduced rectal temperature and heat storage before the start of exercise.

The effect of ice slushy ingestion and mouthwash on thermoregulation and endurance performance in the heat.

Although the benefits of cold-beverage consumption are more potent when there is ingestion, improved RPE, TC, and meaningful performance improvement with WASH supports an independent sensory effect of presenting a cold stimulus to the mouth.

Ice Slurry Ingestion Leads to a Lower Net Heat Loss during Exercise in the Heat.

Compared to 37 °C, ICE ingestion caused disproportionately greater reductions in Esk relative to Hfluid, resulting in a lower HLnet and greater S. From a heat balance perspective, recommendations for ICE ingestion during exercise in warm, dry conditions should be reconsidered.
...

References

SHOWING 1-10 OF 43 REFERENCES

Cold drink ingestion improves exercise endurance capacity in the heat.

Compared with a drink at 37 degrees C, the ingestion of a cold drink before and during exercise in the heat reduced physiological strain (reduced heat accumulation) during exercise, leading to an improved endurance capacity.

Thermal regulatory responses to submaximal cycling following lower-body cooling in humans

Lower-body precooling is effective at decreasing body heat storage prior to exercise and decreases reliance on heat dissipation mechanisms during exercise and should have a broader application than other precoolsing treatments.

Influence of body temperature on the development of fatigue during prolonged exercise in the heat.

It is demonstrated that high internal body temperature per se causes fatigue in trained subjects during prolonged exercise in uncompensable hot environments and time to exhaustion in hot environments is inversely related to the initial temperature and directly related toThe rate of heat storage.

Thermoregulatory, cardiovascular, and muscular factors related to exercise after precooling.

The effect of slightly lowered body temperature on endurance time and possibly related physiological factors was studied in seven male volunteers exercising on a cycle ergometer at an ambient

Effect of slightly lowered body temperatures on endurance performance in humans.

It appears that the improved performance in PRET was related to an increased O2 supply to the working muscles, and plasma levels of total beta H-endorphin immunoreactivity were in the same range under both test conditions.

Human circulatory and thermoregulatory adaptations with heat acclimation and exercise in a hot, dry environment.

It is concluded that the high core temperature per se, and not circulatory failure, is the critical factor for the exhaustion during exercise in heat stress.

Combined effects of pre-cooling and water ingestion on thermoregulation and physical capacity during exercise in a hot environment

The results suggest that the combination of pre-cooling and water ingestion increases exercise endurance in a hot environment through enhanced heat storage and decreased thermoregulatory and cardiovascular strain.

Effects of ambient temperature on the capacity to perform prolonged cycle exercise in man.

There is a clear effect of temperature on exercise capacity which appears to follow an inverted U relationship, and significant effects of Ta were observed on VE, VO2, R, estimated fuel oxidation, HR, Tre, Tsk, sweat rate, and RPE.

Practical precooling: Effect on cycling time trial performance in warm conditions

A practical combined precooling strategy that involves immersion in cool water followed by the use of a cooling jacket can produce decrease in rectal temperature that persist throughout a warm-up and improve laboratory cycling time trial performance in warm conditions.

Exercise duration and thermoregulatory responses after whole body precooling.

It was concluded that precooling results in greater exercise endurance with enhanced heat storage rate and less stress on metabolic and cardiovascular systems.