The effect of ice ingestion during endurance exercise

Gaizka Mejuto,Roger Eston,Stephanie Gilbert,David Bentley,Sam Chalmers

doi:10.1186/2046-7648-4-s1-a126

Gaizka Mejuto, Roger Eston + Show 3 more

Open Access

https://doi.org/10.1186/2046-7648-4-s1-a126

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Abstract

When exercising in a hot and humid environment, athletes encounter thermoregulatory strain leading to decreased central neurological drive and reduced skeletal muscle activation [1]. Reducing initial core temperature prior to exercise increases the capacity to store metabolic and environmental heat [2]. It has been also found that ice 'slurry' ingestion is an effective precooling strategy reducing rectal temperature (Tre) [5]. The purpose of this study was to compare the effects of ice slurry ingestion before exercise in the heat with combined precooling (with ice slurry) and ingestion of ice slurry during exercise on endurance performance in hot conditions.

Highlights

When exercising in a hot and humid environment, athletes encounter thermoregulatory strain leading to decreased central neurological drive and reduced skeletal muscle activation [1]
The experimental trials took place in hot environmental conditions (32 °C, 50% relative humidity) in an environmental chamber. In these conditions participants exercised on a cycle ergometer at 70% VO2 max (SS) for 45 mins, followed by a 10 km time trial (TT), using self-selected cadence and intensity
There were no significant differences in performance between the conditions in the 10 km TT performance (TN: 14.90(0.99), PO: 15.2(1.14), PCD: 15.30(1.15) mins, p = 0.72) but Tre was significantly lower in PO and PCD than TN during SS cycling (p < 0.05) and in the TT (p < 0.05)

Summary

Introduction

When exercising in a hot and humid environment, athletes encounter thermoregulatory strain leading to decreased central neurological drive and reduced skeletal muscle activation [1]. Reducing initial core temperature prior to exercise increases the capacity to store metabolic and environmental heat [2]. It has been found that ice ‘slurry’ ingestion is an effective precooling strategy reducing rectal temperature (Tre) [5]. The purpose of this study was to compare the effects of ice slurry ingestion before exercise in the heat with combined precooling (with ice slurry) and ingestion of ice slurry during exercise on endurance performance in hot conditions

Methods

Results

Discussion

Conclusion

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