فهرست مطالب ruba al-fassih

Thrombotic events are common during old age and high intensity interval exercise (HIIE) is prescribed on the health of elderly individuals. Nevertheless, effects of high intensity interval exercise (HIIE) on hemostasis in elderly individuals have not been investigated. Therefore, the present study aimed to investigate the response of hemostatic factors to different HIIE protocols and moderate continuous exercise in elderly male wistar rats.

Twenty-four elderly male wistar rats were divided into four groups. Rats in the high-intensity interval exercise with low-volume (HIIEL) group performed 14 bouts of 20s of activity with 10-second rests at an intensity of 110% of maximum tolerable load (MSL). Rats in the high intensity high-volume interval group (HIIEH) performed five bouts of four min swimming at 80% of MSL followed by three min rest and finally in the continuous group (CTN) the  rats swam for 35 min at 60% of MSL. The control group remained immersed in water for 35 minutes without activities. Blood samples were taken immediately after exercise for measuring lactate and hemostatic factors. The statistical analysis of the data was performed using one-way analysis of variance at a significance level of p<0.05.

Lactate concentration was increased following HIIEL in comparison to other groups. In addition, in the HIIEL and HIIEH groups, sports activity led to a significant increase in the Von Willebrand factor.  Although, the VIII factor and fibrinogen increased and decreased in both CTN and HIIEL groups, respectively and decreased and increased in HIIEH group, the changes were not significant. Also, significant changes in dimer levels, relative activated thromboplastin time and prothrombin time after swimming were not seen in any group.

Based on higher increases in von Willebrand factor following intense interval exercise (compared to continuous exercise) it is concluded that moderate continuous exercise might be safer than HIIE during old age.

today, the record is one of the major concerns of coaches in competitive swimming. Therefore, finding the proportional type of resistance training as an essential factor affecting physical fitness and performance, is highly important. The purpose of this study was to investigate the effect of four weeks total body resistance training on muscular function and performance of young female swimmers.

Twelve college-level female swimmers were divided into Control and TRX group. The control group performed swimming protocol while the experimental group carried out eight swim like TRX addition to swimming program. Muscular function was measured using isokinetic device and swimming performances was measured by the record they reached and the number of hands and feet strokes during 25 and 50 m breaststroke swimming. Independent T-test was used to analyze the research data after subtracting the pretest from the post-test.

Both groups have shown significance improvement in 25 m swimming record but there wasn’t significant difference between groups (P = 0.289). Moreover, Number of strokes decreased significantly in TRX group (P = 0.31). Muscular function factors in 25 m and total work in 50 m has shown improvement in TRX group (P ≤ 0.05).

In general, combination of TRX with swimming training is most effective than swimming alone to improve swimmers performances.

In general, the results of this study indicate that the combination of TRX with swimming training is more suitable for improving swimmers' performance. It is also recommended that swimmers take advantage of this training method due to the principle of Specificity training and easy use.