This study provides a relatively accurate and convenient VO2max prediction equation based on the 6MWT and body mass index in healthy boys. This model can be used for evaluation of cardiorespiratory fitness of boys in different settings.

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The current study investigated the effect of an aquatic training program on balance in women with low back pain. Methods: This was a quasi-experimental study with a pre-test and post-test and control group design. The study population included all patients with low back pain who referred to orthopedics s offices. In total, 30 women suffering from back pain were purposefully and voluntarily selected; then, randomly divided into two experimental (15 patients) and control (15 patients) groups. The subjects of the aquatic exercise group received a 12-week aquatic exercise program of 3 sessions per week for 60 minutes. The control group received no physical activity program. At the beginning and end of the experimental period, the patients' balance was assessed using Berg Balance Scale. The obtained data were analyzed using t-test and the Analysis of Covariance (ANCOVA) at the significance level of P<0.05, by SPSS. Results: We observed a statistically significant improvement in the scores of the experimental group, compared to the control group prior period balance (P<0.05). However, no significant change was observed in the controls (P≥0.05). Compared with the control group, the experimental group scores significantly increased after receiving the twelve weeks of aquatic treatment (P<0.05). Conclusion: The obtained results suggested that aquatic exercise therapy can be a useful treatment method to improve balance and subsequently improve the daily performance of patients.

The development and organism change, especially changes in biological maturation process, is impressive on the physiological parameters in response to exercise. Hence, the new index oxygen uptake efficiency slope (OUES) role with biological maturity intervention and anthropometric factors of body weight, BSA and LBM which can measure the cardiorespiratory function in children maturity level normal and abnormal (early or late) with high health and safety is important. 72 healthy young males, with a mean age 13.95 ± 1.8 years and BMI 19.91 ± 3.4 kg/m 2 were separated into two groups of normal puberty (n = 33) and abnormal maturation (n = 39). After consent obtaining, their VO 2max was determined by maximal aerobic test via gas analyzer (VE, VO 2 and VCO 2 ). The new index OUES was also determined according to logarithmic relationship Baba. A high correlation was observed between VO 2max and OUES physiological index (R 2 = 0.90, SEE = 292). There was no significant difference in the index OUES with and without the intervention of weight, BSA and LBM between normal and abnormal maturation of boys (p > 0.05). Significant correlation between VO 2max and normalized OUES with anthropometric variables was obtained (R = 0.83, R = 0.87, R = 0.91, p = 0.00). OUES is influenced by weight, BSA and LBM. But the BSA role in the index of cardiac performance was more sensitive than the other two parameters. It appears that due to the lack of intervention maturation effect on this index, during the study of cardiorespiratory system physiological responses of children to exercise, regardless of the maturity the application of this index is possible. © 2015 Consell Català de l'Esport. Document downloaded from http://www.apunts.org, day 24/12/2015. This copy is for personal use. Any transmission of this document by any media or format is strictly prohibited. Document downloaded from http://www.apunts.org, day 13/01/2016. This copy is for personal use. Any transmission of this document by any media or format is strictly prohibited. 140 F. Nazem, A. Sazvar PALABRAS CLAVEMadurez; Antropometría; Gradiente de eficiencia de la captación de oxígeno (Oxygen Uptake Efficiency Slope (OUES)) Papel de los factores de maduración biológica y antropométricos en la tasa de reserva cardiaca (TRC) en adolescentes iraníesResumen Los cambios en el desarrollo, especialmente los cambios en el proceso de maduración biológica, pueden conllevar unas diferencias impresionantes en cuanto a los parámetros fisiológicos como respuesta al ejercicio. Por tanto, es importante el papel que representa el nuevo índice del gradiente de eficiencia del consumo de oxígeno (''oxygen uptake efficiency slope (OUES)'' porque incluye variables de maduración biológica, así como factores como el peso corporal antropométrico, el área de la superficie corporal (ASC) y la magra masa corporal (MMC). Por tanto, dicho índice puede medir, de modo seguro, la función cardiorespiratoria en niños con niveles de madurez normal o anormal (temprana o tardía), y aportar una información...

Background and aims: Measurement of the cardiorespiratory fitness (CRF) (VO2peak) is not possible in every clinical and exercise setting due to complexity, cost, and time required. Submaximal field exercise test in an alternative method. Among exercise tests, the 6-minute walk test (6MWT) measures the maximal distance which a person can walk in 6 minutes. The purpose of the present study was to develop and cross-validate the VO2peak prediction equation based on the 6MWT in boys. Methods: VO2peak was measured by Bruce treadmill protocol with gas analysis in 157 healthy boys (13-17 years old). The 6MWT and anthropometric variables were measured according to standard methods. Data were analyzed using Kolmogorov-Smirnov test, Pearson correlation, and multiple regression analysis. Results: It was found that VO2peak of the boys had a significant correlation with 6MWT and anthropometric variables (r=0.318-0.853). VO2peak of the adolescent boys could be predicted by the distance walked in 6 minutes and body mass index (BMI) (R2 = 0.825, SEE = 2.81 mL/kg/min, P<0.001). When the new VO2peak prediction equation was applied for the subjects of this study, predicted VO2peak had a high correlation with measured VO2peak (r = 0.908, P<0.001). Conclusion: The 6MWT and proposed native VO2peak prediction equation could be used as a simple and safe tool for measurement of the CRF in the boys. It seems that physicians, exercise and fitness coaches, and physiotherapists could be able to evaluate the effect of medical and exercise prescriptions on the CRF of the boys via performing the 6MWT. This claim needs future studies.

Background: Cardiac respiratory system plays an important role in individuals' health, promotion of patients' life quality, and professional athletes' performance. It is of great importance to measure it for exchange of inhaled gases during sports stress tests as an efficient method to study the physiological efficacy of cardiac respiratory system and understand the active skeletal muscle metabolism in work measurement. Regarding the problems of measuring inhaled gases in sports maximal tests, using safe and simple methods with good validity in estimating the individuals' cardiac respiratory preparedness becomes appropriate. Aims and Objectives: In this research, we aim to evaluate individual's aerobic power with allometric equations through a simple mathematical formula. Materials and Methods: A total of 72 healthy youth boys with mean age (13.95 ± 1.84) years and weight (51.64 ± 13.15 kg) were divided into two groups of normal maturity (33 person) and non-normal (39 person) and participated in the maximal protocol of aerobics voluntarily. The practical capacity was measured directly by analyzer gas. Then, using regression analysis and harmonic graph of Bland Altman, we obtained the relationship between VO 2 max from the standard method (direct measurement) and estimated (design allometric equations). Results: Iranian-specific allometric equations (VO 2 max = 0.15 × lean body mass 0.8 , R = 0.73, SEE = 0.57) and (VO 2 max = 0.97 × body surface area 1.89 , R = 0.72, SEE = 0.58) were designed with greater validity and neutrality of maturity. Conclusions: We can with use of this allometric equations, the amount of youth boys' aerobic power, preparation and assessed without any sports test.