"Effects of different local cooling applications on endurance capacity during cycling, a two year overview"

Clijsen, Ron and Hohenauer, Erich and Taeymans, Jan and Clarys, Peter and Baeyens, Jean Pierre and Cabri, Jan (2010) "Effects of different local cooling applications on endurance capacity during cycling, a two year overview". In: The 6th European EISCSA Congress, 20-21 May 2010, Saint Etienne, France.

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Introduction: Heat production by intense prolonged exercise induces a decrease in physical performance. Under warm and humid environmental conditions, evaporation is the primary mechanism for muscle heat dissipation (Nybo et al., 2007). This abstract summarizes the results of two studies investigating the effects of local body cooling modalities on the endurance capacity during cycling. Methods: Using a standardized incremental bike ergometer test in a randomized cross-over design, Clijsen et al. (2008) investigated the effects of local cooling of the upper arms on the endurance capacity in 7 female and 2 male healthy subjects. “Energicer” bands (Liquid Ice Cosmedicals GmbH, Unterägeri, Switzerland) for the local cooling applications. The two bands (7.5 x 5 x 0.5 cm) were saturated with a menthol-alcohol liquid (33.2 g). Time to exhaustion was the independent variable for endurance capacity. Variables measured at the end of each incremental step were, blood lactate, heart rate, body temperature and perceived exhaustion (BORG scale). Temperature (23°C) and relative humidity (40%) of the lab were kept constant. Using the same test protocol and cooling product, Hohenauer et al. (2009) investigated the effect of different local cooling applications on the endurance capacity during cycling under warm (35°C) and humid (44%) conditions. The subjects (n=7) were tested under four different conditions: A= without cooling; B= “Energicer” cooling bands; C= “Energicer” cooling vest; D= “Energicer” cooling bands and vest. Bands and vest were saturated with the “Energicer” fluid (25 respectively 225 g). Results: No significant differences (p>0.05) for the evaluated variables could be demonstrated between the two test conditions in Clijsen et al.’ study (2008) neither between the four test conditions in Hohenauer et al.’ study (2009). Discussion: Potential effects of the “Energicer” could have been mimicked by the artifial lab situation. Future research will focus on the combined influence of airflow with cooling bands and vest. Conclusion: Under the present standardized lab conditions, local cooling of the upper arms and/or upper body by “Energicer” bands and/or vest did not enhance endurance capacity during cycling. References: Verducci FM, Journal of Athletic Training; 35(4):422-426, 2000 Duffield R, Dawson B, Bishop D, Fitzsimons M, Lawrence S. Br J Sports Med, 37:164-169, 2003 Nybo L. J App. Physiol, 104:871-878, 2007

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