Inspiratory muscle fatigue in swimmers after a single 200 m swim

Inspiratory muscle fatigue may occur in as little as 6 min during high-intensity spontaneously breathing exercise. The aims of this study were to determine whether inspiratory muscle fatigue occurs during swimming exercise and whether inspiratory muscle strength differs between the supine and standing body positions. Seven competitive swimmers were recruited to perform a single 200 m front-crawl swim, corresponding to 90-95% of race pace. Inspiratory muscle strength was measured at residual volume using a hand-held mouth pressure meter that measured maximal inspiratory pressure in the upright and supine positions. At baseline, maximal inspiratory pressure in the supine position was significantly lower than maximal inspiratory pressure in the upright position (112 +/- 20.4 and 133 +/- 16.7 cmH2O, respectively; P < or = 0.01). Post-exercise maximal inspiratory pressure in the supine position (80 +/- 15.7 cmH2O) was significantly lower than baseline maximal inspiratory pressure in the supine position (P < or = 0.01). The results indicate that a single 200 m front-crawl swim corresponding to 90-95% of race pace was sufficient to induce inspiratory muscle fatigue in less than 2.7 min. Furthermore, although diaphragm muscle length is optimized when supine, our results indicate that the force output of the diaphragm and inspiratory accessory muscles is greater when upright than when supine.     

THE IMPLICATIONS OF NATIONAL POLICIES IN THE UNITED STATES,BRAZIL, EL SALVADOR,AND PERU ON EARLY CHILDHOOD TEACHER EDUCATION

It may seem obvious but the world is filled with believers in the value of good care and attention to children during the earliest months and years. That belief is embedded in virtually all cultural traditions. Indeed, both common wisdom and hard scientific research evidence lead to the forceful conclusion that the earliest years of life are critical in the development of the intelligence, personality, and the social values and behaviors that will characterize later life... But if the value of the early years is so evident... why is there such neglect by families and social institutions? Among the reasons that might be offered are the following: Families living in extreme poverty or victimized by war and famine, may be so busy surviving that they cannot give the

loving attention to their children they would like to give. Families living in luxury may be too busy making money, or spending it, to give the needed time to their children. At the same time, some institutions that could help families to help their children take the position that the child development is best left to families. ‐‐Robert G. Myers, 1991     

Examining the moderating effect of inconsistent reviews and its gender differences on consumers’ online shopping decision

The prevalence of social media has provided consumers with many opportunities to post online reviews on a wide range of products on the Internet. In this study, we attempt to investigate the moderating effect of inconsistent reviews (i.e., a mix of positive and negative reviews) on consumers’ purchase decision. We further examine whether the effect will differ from female to male consumers.