This study was conducted to determine the effects of 8-weeks TRX exercises toward upper extremity area of male swimmers in 10-12 age group on 25 meter and 50 meter freestyle swimming degrees and the number of 50 m strokes. 14 licensed and 7 amateur male athletes who are from Kocaeli Province Gölcük Municipality Swimming Club voluntarily participated in this study. Participators were divided into three groups as Subject1 (n=7, age average= 11.14±0.69 years, height average= 1.53±0.06 m, bodyweight average= 39.16±6.11 kg stroke length average= 1.54±0.07 m), Subject2 (n=7, age average= 11±0.82 years, height average = 1.52±0.05 m, bodyweight average = 40.26±5.09 kg stroke length average= 1.53±0.05 m) and Control (n=7, age average = 11.14±0.9 years, height average= 1.52±0.05 m, bodyweight average = 43.31±7.35 kg and stroke length average= 1.50±0.05 m) groups. Athletes of Subject1 group performed 60° TRX exercises such as Push Up, Chest Press, Chest Fly, Low Row, Biceps Curl, Triceps Extension, Reaching Row toward upper extremity area in addition to 8-weeks swimming practices. TRX practices were performed for 3 days a week before swimming exercises. Subject2 group performed routine club swimming exercises only; the control group has not applied any exercises. Obtained data were analyzed by Paired-Samples t-test and One-Way ANOVA test in SPSS 24.0 packaged software. Results were evaluated at p< .05 significance level. It is determined in in-group comparisons that there are significant differences between 25 m and 50 m freestyle pretest and posttest swimming degrees (p< .05). Concerning between-groups comparisons, there are significant differences between posttest values of control and subject2 group in terms of both the number of 50 m stroke and 25 m and 50 m swimming degrees (p< .05). Regarding posttest values of control and subject1 group, there also are significant differences in both the number of 50 m strokes and 25 m freestyle swimming degrees (p< .05). We can say as the result of this study that TRX exercises toward upper extremity area of swimmers in 10-12 age group have a positive effect on the number of 50 m strokes and 25 m and 50 m freestyle degrees.
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