MAHIDOL UNIVERSITY WISDOM OF THE LAND Comparison of Oxygen Uptake between Single and Double Legs Rope Jumping Exercise MAHIDOL UNIVERSITY WISDOM OF THE LAND Monchai Chottidao and Weerawat Limroongreungrat College of Sports Science and Technology, Mahidol University Nakhonpathom, Thailand. (Sponsor: Yong Tai Wang, FACSM) ABSTRACT PURPOSE: To investigate differences in oxygen uptake (VO2) between single leg (SL) and double legs (DL) rope jump. METHODS: Nine healthy males, age ranged between 19 and 21 years, (Mean age, Mean weight and Mean height of 20.22 ± 0.66 yr, 65.11 ± 9.19 kg and 174.22 ± 4.38 cm, respectively). All participants were performed jump rope exercises either a SL or DL jump conditions at the intensity of 72 round/min for 5 minutes. The order of each jump rope condition was randomly assigned. Participants were allowed to have a 15-min rest between each condition. Prior to the testing, anthropometric data including body weight (BW), height, BMI resting heart rate (RHR) were collected. Cardiorespiratory fitness measurement volume of carbondioxide (VCO2) and volume of oxygen uptake (VO2) were collected during exercises. Dependent t-tests were employed to determine differences between the two conditions. RESULTS: SL had lower VO2 (1,970.22 ± 304.12 ml/min) as compared to DL (2,150.78±403.69 ml/min) (p = 0.003). The VO2/BW of SL (30.28 ± 2.75 ml/min/kg) was also lower than DL (33.02 ± 4.65ml/min/kg) (p = 0.021). Although no statistical significant differences were found, the VCO2 of DL (2,453.33 ± 584.18 ml/min) was higher than SL (2,199.44 ± 314.19 ml/min) (p = 0.073).CONCLUSIONS: Oxygen uptake of DL rope jump had higher than SL rope jump in 5 min. METHODS RESULTS All participants were performed jump rope exercises either a SL or DL jump conditions at the intensity of 72 round/min for 5 minutes. The order of each jump rope condition was randomly assigned. Participants were allowed to have a 15-min rest between each condition. Prior to the testing, anthropometric data including body weight (BW), height, BMI resting heart rate (RHR) were collected. Cardiorespiratory fitness measurement volume of carbondioxide (VCO2) and volume of oxygen uptake (VO2) were collected during exercises. Dependent t-tests were employed to determine differences between the two conditions. SL had lower VO2 (1,970.22 ± 304.12 ml/min) as compared to DL (2,150.78±403.69 ml/min) (p = 0.003). The VO2/BW of SL (30.28 ± 2.75 ml/min/kg) was also lower than DL (33.02 ± 4.65ml/min/kg) (p = 0.021). Although no statistical significant differences were found, the VCO2 of DL (2,453.33 ± 584.18 ml/min) was higher than SL (2,199.44 ± 314.19 ml/min) (p = 0.073). [ml/min] [ml/kg/min] * * SL DL SL DL Figure 1 Comparisons of means ±(SD) values of VO2 between SL group and DL group Figure 2 Comparisons of means ±(SD) values of VO2 /bw between SL group and DL group (*significantly different between SL group and DL group p<.05) (*significantly different between SL group and DL group p<.05) INTRODUCTION Jumping rope is a simple physical activity that can promote physical health. It is believed that jump rope can increase agility, coordination, and balance, but it is not improve cardiovascular fitness. Moreover, different jumping styles may produce oxygen uptake. CONCLUSION Oxygen uptake of double leg rope jump had higher than single leg rope jump in 5 min. Experimental Design   SUBJECTS [N=9]  RANDOMIZE SAMPLING SINGLE LEG ROPE JUMP DOUBLE LEG ROPE JUMP 15 MIN REST Intensity of 72 round/min for 5 minutes ??? VO2 ??? Begley, S. Your Child’s Brain. Newsweek, Feb. 19, 1996. Hannaford, C. Smart Moves, Great Ocean Publishers, 1995. Weikart P., Beat Competency and Beat Awareness. AAHPERD Convention Presenter. Orlando. 2000. Pittenger VM, McCaw ST, Thomas DQ. Vertical ground reaction forces of children during one- and two-leg rope jumping. Res Q Exerc Sport. 2002; 73: 445–449. REFERENCE Table 1. Means and Standard Deviation for Physical Characteristics in Subjects. VARIABLES MEANS±SD [N=9] Weight [Kg] 65.01±9.19 Height [cm] 174.22±4.38 Body Mass Index 22.26±3.14 Resting Heart Rate [beat/min] 68.44±10.32 Systolic Blood Pressure [mmHg] 124.66±12.24 Diastolic Blood Pressure[mmHg] 69.88±8.46 ACKNOWLEDGEMENTS Supported by a grant from Faculty of Graduate Studies and College of Sports Science and Technology, Mahidol University, Thailand www.icses2010thailand.com