...those more experienced bathers can feel the excitement of swimming in deep water by rounding the bends of the reefs and venturing out to the open great pools that lie beyond.
Celotno besedilo
Dostopno za:
BFBNIB, DOBA, IZUM, KILJ, NMLJ, NUK, PILJ, PNG, SAZU, UILJ, UKNU, UL, UM, UPUK
From nineteenth-century public baths to today's private backyard havens, swimming pools have long been a provocative symbol of American life. In this social and cultural history of swimming pools in ...the United States, Jeff Wiltse relates how, over the years, pools have served as asylums for the urban poor, leisure resorts for the masses, and private clubs for middle-class suburbanites. As sites of race riots, shrinking swimsuits, and conspicuous leisure, swimming pools reflect many of the tensions and transformations that have given rise to modern America.
The aim of this research was to determine the differences in specific race performance characteristics of male swimmers in the 50-m and 100-m freestyle at the Serbia Open Championship 2017 ...(long-course). The overall sample included in this study consisted of 40 swimmers divided by a K-Means Cluster Analysis into three groups in relation to the results in the 50-m freestyle (G1_50, T50=23.53±.27 s, n=6; G2_50, T50=24.54±.33 s, n=18; G3_50, T50=25.52±.33 s, n=16), and 55 swimmers also divided into three groups in relation to the results in the 100-m freestyle (G1_100, T100=50.99±.82s, n=10; G2_100, T100=53.41±.48 s, n=17; G3_100, T100=56.13±1.32 s, n=28). The research results indicate that there is a difference in the specific race performance characteristics in relation to the achieved results in the 50-m freestyle, including: t10_50 (F=16.79, p=.000), SL2_50 (F=4.44, p=.019) and SI2_50 (F=13.49, p=.000), also in the 100-m freestyle, including: t10_100 (F=36.45, p=.000), SL1_100 (F=5.77, p=.005), SL2_100 (F=17.47, p=.000), SL3_100 (F=7.72, p=.001), SL4_100 (F=9.84, p=.000), SI1_100 (F=5.12, p=.009), SI2_100 (F=45.97, p=.000), SI3_100 (F=13.86, p=.000), SI4_100 (F=31.23, p=.000), SR1_100 (F=4.12, p=.022) and SR2_100 (F=6.37, p=.003). Based on these results we can draw the conclusion that swimmers who have better control over their race performance characteristics during all the segments of the race, including stroke length, stroke index and stroke rate have the potential of being faster in the 50-m and 100-m freestyle.
At front crawl, the upper-limbs are responsible for nearly 90% of the forward propulsion. Therefore, the assessment of the upper-limb propulsive force is of major importance. Usually, this is ...assessed based in tethered swimming. However, it might be claimed that tethered swimming may infer constrictions while simulating the swim technique. Hence, the aim of this study was to assess the upper-limb propulsive force at front crawl based in a sensor system, allowing to measure it while swimming (i.e., with displacement). Five collegiate swimmers (3 males and 2 females) were recruited. Swimmers performed a 25m bout at maximal front crawl. The mean propulsive force and the peak force of each stroke (dominant and non-dominant limb) were analyzed during three consecutive stroke cycles, during the intermediate 15m were analyzed. For both males and females, a substantial difference with a large effect size, was observed between the upper-limbs (dominant versus non-dominant) for the mean and peak propulsive force.
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