F-52 Free Communication/Slide - Body Composition: JUNE 4, 2010 3:15 PM - 5:15 PM: ROOM: 349
Is Body Cell Mass Determinant For Cardiorespiratory Fitness In Male And Female Elite Basketball Players?
June 4 3:30 PM - 3:45 PM
PURPOSE: This study was designed to examine the association between the metabolically active cellular mass, i.e. body cell mass (BCM), with cardiorespiratory fitness (CRF) in male and female elite basketball junior players.
METHODS: Subjects were 22 basketball players, aged 16-17 years, from the Portuguese elite teams divided in two groups: 12 males [body weight (BW): 78.4±7.2 kg; height: 192.5±6.5 cm; VO2max: 4864.4±296.0 mL/min; BCM: 37.6±3.0 kg] and 10 females (BW: 64.8±7.7 kg; height: 175.5±6.6 cm; VO2max: 3196.9±317.3 mL/min; BCM: 26.9±2.7 kg). A model [BCM=LST-(ECF+ECS)] was used to calculate BCM, where LST is lean-soft tissue, ECF is extracellular fluids, and ECS is extracellular solids. Whole-body analysis by DXA (Hologic QDR-4500) was performed to estimate LST and ECS (calculated as 1.732xMineral Osseous) while bioelectrical impedance spectroscopy (Xitron 4200) was used to assess ECF. To assess CRF, a maximal graded exercise test protocol was performed on a treadmill using a variable speed and grade. Maximal oxygen uptake (VO2max) was measured by a breath-by-breath system with a zircon O2 analyser coupled to an open circuit spirometry system (Cosmed, Quark b2). All measurements were made in the first week of the pre-season training period.
RESULTS: A positive association was found between BCM and VO2max in male players (r=0.63; p=0.028) which remained significant after controlling for BW and age (r=0.68; p=0.030). For females no associations were observed between BCM and VO2max (r=-0.097; p=0.791) even when adjusting for age and BW (r=0.097; p=0.819).
CONCLUSIONS: These findings suggest that higher CRF values in males are related with a larger metabolically active component (i.e. BCM), even accounting for the potential effects of age and BW. Further research is needed to understand the underlying mechanisms of gender-related differences in the associations observed between CRF and BCM in basketball junior players of the Portuguese elite teams.© 2010 American College of Sports Medicine