The aim of this study was to compare the @entity26 uptake ([Formula: see text]) kinetics in front crawl between male and female swimmers at moderate and heavy intensity. We hypothesized that the time constant for the primary phase [Formula: see text] kinetics was faster in @entity1 than in @entity1 , for both intensities. Nineteen well trained swimmers (8 females mean    SD; age 17.9    3.5 years; mass 55.2    3.6 kg; height 1.66    0.05 m and 11 male 21.9    2.8 years; 78.2    11.1 kg; 1.81    0.08 m) performed a discontinuous maximal incremental test and two 600-m square wave transitions for both moderate and heavy intensities to determine the [Formula: see text] kinetics parameters using mono- and bi-exponential models, respectively. All the tests involved breath-by-breath analysis of front crawl swimming using a swimming snorkel. The maximal @entity26 uptake [Formula: see text] was higher in @entity1 than in @entity1 [4,492    585 ml  @entity1009 ) and 57.7    4.4 ml  kg(-1)  @entity1009 ) vs. 2,752.4    187.9 ml  @entity1009 ) (p <=  0.001) and 50.0    5.7 ml  kg(-1)  @entity1009 )(p = 0.007), respectively]. Similarly, the absolute amplitude of the primary component was higher in @entity1 for both intensities (moderate: 1,736    164 vs. 1,121    149 ml  @entity1009 ); heavy: 2,948    227 vs. 1,927    243 ml  @entity1009 ), p <=  0.001, for males and females, respectively). However, the time constant of the primary component (  p) was not influenced by sex (p = 0.527) or swimming intensity (p = 0.804) (moderate: 15.1    5.6 vs. 14.4    5.1 s; heavy: 13.5    3.3 vs. 16.0    4.5 s, for females and males, respectively). The slow component in the heavy domain was not significantly different between female and male swimmers (3.2    2.4 vs. 3.8    1.0 ml  kg(-1)  @entity1009 ), p = 0.476). Overall, only the absolute amplitude of the primary component was higher in @entity1 , while the other [Formula: see text] kinetics parameters were similar between female and male swimmers at both moderate and heavy intensities. The mechanisms underlying these similarities remain unclear.

Sex and Exercise Intensity Do Not Influence XXXX Uptake Kinetics in Submaximal Swimming.

@entity1 :: ('9606', 'Species') :: ['women', 'men'] @entity26 :: ('MESH:D010100', 'Chemical') :: ['oxygen'] @entity1009 :: ('966', 'Gene') :: ['min(-1']
@entity26 :: (MESH:D010100,Chemical) :: ['Oxygen']
