Perbedaan Pengaruh Dehidrasi 2.2 % Dan 2.8% Terhadap Prestasi Lari 400 Meter

Dehydration is a case that will happen when exercising. The allowed dehydration level for a single exercise for health is still uncertain. Based on a review of research, dehydration up to 2% can lower mood but has not decreased aerobic performance. Information on the allowed level of dehydration to maintain exercise and performance still needs to be done. The research method used was an experimental pre-test post-test method. This study compared 2.2% and 2.8% dehydration levels on 400 meters running performance. The population of this study was all Sports Coaching Education students class of 2017 and 2018. The sample grouping was administered randomly into two groups. The first group was the 2.2% dehydration group consisted of 16 students. The second group was the 2.8% dehydration group consisted of 25 students. The dehydration process was conducted passively by doing sunbathing while using a raincoat. Bodyweight was measured before dehydration up to several times to reach the desired level of dehydration. The measurement of the 400-meter run was carried out before weight measurement and after dehydration. The data were analyzed by Mann-Whitney U test. The results of the data analysis concluded that there was no difference in the 400-meter run performance at the two levels of dehydration. Dehydration between 2.2% level and 2.8% level equally lowered the 400-meter running performance. This study suggests that the athlete's hydration level when exercising should be kept below 2.2% to achieve optimal performance. During training, athletes should be provided with drinks to maintain hydration levels.

Download Full-text

The Effects of a Running Consistency Programme on Footfall Variability and Performance in the Long Jump

Polish Journal of Sport and Tourism ◽

10.1515/pjst-2016-0019 ◽

2016 ◽

Vol 23 (3) ◽

pp. 145-152

Author(s):

Marcin Starzak ◽

Hubert Makaruk ◽

Anna Starzak

Keyword(s):

Training Programme ◽

Control Group ◽

Education Students ◽

Acceleration Phase ◽

Physical Education Students ◽

Step Velocity ◽

Post Test ◽

Long Jump ◽

And Performance ◽

Experimental Group

Abstract Introduction. The main purpose of this study was to evaluate the effect of a training programme aimed to enhance toe-toboard consistency on footfall variability and performance in the long jump. Material and methods. The study involved 36 male physical education students. The experimental group participated in a 12-week training programme, whereas the control group was limited to taking part in the classes held at university. All participants performed 6 long jump trials during two testing sessions. The kinematic parameters were assessed using the Optojump Next device and were further analysed to determine the variability of footfall placement during the approach run. Results. The analysis revealed a significant (p < 0.01) decrease in footfall variability in the experimental group between the pre-test and post-test. After the completion of the training programme, the participants significantly (p < 0.05) improved their take-off accuracy. Additionally, they significantly (p < 0.05) increased their velocity in the last five steps before take-off and the effective distance of the jump (p < 0.001). Conclusions. The results of this study indicate that through specific training, it is possible to improve the consistency of the steps in the acceleration phase of the approach run in the long jump. Moreover, decreasing footfall variability helps achieve a more stable step pattern which may be beneficial for greater accuracy at the take-off board and makes it possible to increase step velocity at the final stage of the approach run.

Download Full-text

Positional Match Running Performance and Performance Profiles of Elite Female Field Hockey

International Journal of Sports Physiology and Performance ◽

10.1123/ijspp.2020-0337 ◽

2020 ◽

pp. 1-8

Author(s):

Jonne A. Kapteijns ◽

Kevin Caen ◽

Maarten Lievens ◽

Jan G. Bourgois ◽

Jan Boone

Keyword(s):

High Performance ◽

Aerobic Performance ◽

Field Hockey ◽

Running Performance ◽

Positioning Systems ◽

Performance Capacity ◽

Total Distance ◽

Hockey Players ◽

Performance Profiles ◽

And Performance

Purpose: To determine if there is a link between the demands of competitive game activity and performance profiles of elite female field hockey players. Methods: Global positioning systems (GPS) were used to quantify running performance of elite female field hockey players (N = 20) during 26 competitive games. Performance profiles were assessed at 2 time points (preseason and midseason) for 2 competitive seasons. A battery of anthropometric and performance field-based tests (30–15 intermittent fitness test, incremental run test, 10–30-m speed test, T test, and vertical jump test) were used to determine the performance profiles of the players. Results: Players covered a mean total distance of 5384 (835) m, of which 19% was spent at high intensities (zone 5: 796 [221] m; zone 6: 274 [105] m). Forwards covered the lowest mean total distance (estimated marginal means 4586 m; 95% confidence interval, 4275–4897), whereas work rate was higher in forwards compared with midfielders (P = .006, d = 0.43) and central defenders (P = .001, d = 1.41). Players showed an improvement in body composition and anaerobic performance from preseason to midseason. Aerobic performance capacity (maximal oxygen uptake and speed at the 4-mM lactate threshold) was positively correlated with high-intensity activities. Conclusions: There is a clear relationship between running performance and aerobic performance profiles in elite female hockey players. These results highlight the importance of a well-developed aerobic performance capacity in order to maintain a high performance level during hockey games.

Download Full-text