Background: cryotherapy application is commonly used as a physical therapy tools with many advantages, however numerous researchers have stated decrease in subject balance which affects quality of movement following cryotherapy application, thus the purpose of study was to investigate the immediate and late effect of cryotherapy on ankle dominant joint on static balance and test the difference in static balance change between both sexes.Methods: Thirty healthy subjects, Subjects had their static balance tested during two conditions: (1) an experimental condition where the subject received the cryotherapy application by using cooled gel pack to the dominant ankle joint for 15 minutes immediately before static balance testing and (2) a control condition finished at room temperature. Using coin flip for randomization the order of examining condition. Biodex balance system was used to measure static balance.Results: analysis of data using ANOVA and unpaired test, show insignificantly statistically effect in all aspect of static balance within female group and within male group with p-value of overall stability index for female=0.669, for male =0.382, Anterior/posterior stability index for female =0.196, for male=0.552 and medial/lateral stability index for female =0.989, for male=0.46 and insignificant statistically difference between male and female in all aspect of static balance. Conclusion:the result of the study suggest that using cold gel pack for fifteen minutes of cold gel pack on dominant ankle extremity have no effect on static balance on both sexes.

Introduction. Many adolescents are treated with cold or heat modalities before therapeutic exercise, but the difference between the effect of cold vs. heat on dynamic balance is not clear till now. The study aimed to determine the immediate effects of cold and heat modalities for ankle joint on dynamic balance and also to compare the impact of these modalities on dynamic balance. Methods. The study involved 30 normal adolescents of both genders aged 13-18 years. The Biodex system was used for dynamic balance assessment in each participant under 3 conditions: (1) control condition: at room temperature; (2) immediately after a 15-minute cold immersion (5°C ± 1°C) for ankle joint; (3) immediately after a 15-minute heat immersion (40°C ± 5°C) for ankle joint. For randomization, the order of cold and heat modalities was chosen randomly by using a coin flip. Results. Mixed design MANoVA revealed statistically significant changes in dynamic balance, including overall stability (oAS), anteroposterior stability (AP), and mediolateral stability (ML) after cold modality and after heat modality (p 0.05). The pairwise comparison test to compare cold vs. heat modalities determined that oAS, AP, and ML were statistically significantly improved after heat modality in comparison with cold modality (p 0.05). Conclusions. dynamic balance could be altered immediately after cold or heat modalities. it improved after heat while decreased after cold modality in healthy adolescents.