This research aimed to examine: (1) the difference in the effect of acceleration and interval sprint dribbling methods; (2) the difference in the effect between high and low coordination towards; and ...(3) the interaction between training methods and coordination of football dribbling. This research is an experiment with a 2 x 2 factorial design. The coordination instrument is Soccer Wall Test while the dribbling instrument is Short Dribbling Test. The data were analysed using ANAVA. From this research, it can be concluded that (1) there is a significant difference in the effect between acceleration and interval sprint dribbling training methods on dribbling ability; (2) there is a significant difference in the effect between high and low coordination ability on dribbling ability; and (3) there is a significant interaction between training methods and coordination of football dribbling ability.
At this time teenagers tend to do less exercise as a routine activity due to technological developments that tend to make teenagers more engaged in gadgets. By being lazy to move and continuous ...intake of food will accumulate fat levels in the body. Based on this, it is necessary to do exercises that aim to reduce the level of body fat, namely the jogging sprint combination. The research sample consisted of 24 people divided into 2 groups, namely the treatment group and the control group. The research design was Experimental Randomize Pres-Test and Post-Test Group Design. The results showed that there was a decrease in the level of body fat levels in the jogging sprint combination training with an average decrease in the level of body fat levels by 6.7% or by (23.26%). The conclusion of this study is that the jogging sprint combination training can reduce the level of body fat levels male student X MIPA public senior high school number 2 Tabanan.
Background: Assessment of anaerobic capacity in children with Developmental Coordination Disorder (DCD) is essential for treatment planning. However, available field-based measures have no ...established validity and reliability in this population.
Purpose: To examine the psychometric properties of selected field-based anaerobic capacity tests in children with and without DCD.
Methods: School-aged children (6-16 years) with and without DCD participated in the study. The children completed the shuttle run sub-item of the Bruninks-Oseretsky test of motor proficiency-second edition, the 10 × 5 m sprint tests (straight and slalom) and the muscle power sprint test (MPST).
Results: The shuttle run test item of the Bruninks-Oseretsky test of motor proficiency-second edition and 10 × 5 m sprint tests possess good construct validity and test-retest reliability in children with DCD. The 10 × 5 m sprint test-slalom was found to be the most responsive test among children with DCD. However, the MPST was less reliable in children with DCD compared to their typically developing peers, leading to a very large Smallest Detectable Difference.
Conclusions: The findings suggest that the selected anaerobic capacity measures have sound psychometric properties among children with DCD with the exception of the MPST. Clinicians working on children with DCD could use these tests in their practice, especially in situations where logistical resources are limited.
Implications for Rehabilitation
Field-based anaerobic capacity tests are suitable measures for assessing anaerobic capacity in children with Developmental Coordination Disorder, particularly in situations where laboratory assessments are not feasible.
The shuttle run test item of the Bruninks-Oseretsky test of motor proficiency-second edition and the 10 × 5 sprint tests (straight and slalom) have good construct validity in this population.
The 10 × 5 sprint test (slalom) is the most sensitive anaerobic capacity test among children with Developmental Coordination Disorder.
Aims
This study characterized (a) the cardiac troponin T (cTnT) response to three forms of acute high‐intensity interval exercise (HIE), and (b) the impact of 12 weeks of HIE training on the cTnT ...response to acute exercise in sedentary obese young women.
Methods
Thirty‐six sedentary women were randomized to traditional HIE training (repeated 4‐minute cycling at 90% V˙O2max interspersed with 3‐minute rest, 200 kJ/session), work‐equivalent sprint interval exercise (SIE) training (repeated 1‐minute cycling at 120% V˙O2max interspersed with 1.5‐minute rest) or repeated‐sprint exercise (RSE) training (40 × 6‐second all‐out sprints interspersed with 9‐second rest) group. cTnT was assessed using a high‐sensitivity assay before and immediately, 3 and 4 hours after the 1st (PRE), 6th (EARLY), 20th (MID), and 44th (END) training session, respectively.
Results
cTnT was elevated (P < 0.05) after all forms of acute interval exercise at the PRE and EARLY assessment with cTnT response higher (P < 0.05) after HIE (307%) and SIE (318%) than RSE (142%) at the PRE assessment. All forms of acute interval exercise at MID and END had no effect on the cohort cTnT concentration post‐exercise (all P > 0.05).
Conclusion
For sedentary obese young women, both HIE and SIE, matched for total work, induced a similar elevation in cTnT after acute exercise with a smaller rise observed after RSE. By the 44th training session, almost no post‐exercise cTnT elevation was observed in all three groups. Such information is relevant for clinicians as it could improve medical decisionmaking.
This study explored the impact of short rest intervals on resisted sprint training in elite youth soccer players, specifically targeting enhanced initial-phase explosive acceleration without altering ...sprint mechanics. Fifteen U19 soccer players participated in a randomized crossover design trial, executing two sprint conditions: RST2M (6 sprints of 20 m resisted sprints with 2 min rest intervals) and RST40S (6 sprints of 20 m resisted sprints with 40 s rest intervals), both under a load equivalent to 30% of sprint velocity decrement using a resistance device. To gauge neuromuscular fatigue, countermovement jumps were performed before and after each session, and the fatigue index along with sprint decrement percentage were calculated. Interestingly, the results indicated no significant differences in sprint performance or mechanical variables between RST2M and RST40S, suggesting that the duration of rest intervals did not affect the outcomes. Horizontal resistance appeared to mitigate compensatory patterns typically induced by fatigue in short rest periods, maintaining effective joint movement and hip extensor recruitment necessary for producing horizontal ground forces. These findings propose a novel training strategy that could simultaneously enhance sprint mechanics during initial accelerations and repeated sprint abilities for elite youth soccer players—a methodology not previously employed
It has been suggested that assessment of high-intensity activities during a match is a valid measure of physical performance in elite soccer. Recently, sprinting activities have been analysed in more ...depth. The aim of this study was to develop a detailed analysis of the sprinting activities of different playing positions during European Champions League and UEFA Cup competitions. Altogether, 717 elite outfield soccer players were evaluated throughout 2002-2006 using ProZone® (Leeds, UK). Sprinting (explosive and leading) was analysed for each playing position. To compare positional differences, a Kruskal-Wallis analysis was performed. Differences were found among positions for total number of sprints and total sprint distance covered: wide midfielders > (attackers = wide defenders) > central midfielders > central defenders (P < 0.001), as well as for explosive sprints: (wide midfielders = attackers = wide defenders) > central defenders, wide midfielders > central midfielders > central defenders and attackers = wide defenders = central midfielders (P < 0.001), and leading sprints: wide midfielders > (attackers = wide defenders) > central midfielders > central defenders (P < 0.001). For each group, there were no differences in ratio of explosive to leading sprints. Wide midfielders performed a higher number of sprints in all five distance categories than all other positions. This study showed that sprinting characteristics are influenced by position. Wide midfielders have to complete additional high-intensity activities during training sessions compared with the other positions to achieve the performance level required during the match.
The aim of this study was to investigate the effects of heavy sled towing using a load corresponding to a 50% reduction of the individual theoretical maximal velocity (ranged 57-73% body mass) on ...subsequent 30 m sprint performance, velocity, mechanical variables (theoretical maximal horizontal force, theoretical maximal horizontal velocity, maximal mechanical power output, slope of the linear force-velocity relationship, maximal ratio of horizontal to total force and decrease in the ratio of horizontal to total force) and kinematics (step length and rate, contact and flight time). Twelve (
= 5 males and
= 7 females) junior running sprinters performed an exercise under two intervention conditions in random order. The experimental condition (EXP) consisted of two repetitions of 20 m resisted sprints, while in the control condition (CON), an active recovery was performed. Before (baseline) and after (post) the interventions, the 30 m sprint tests were analyzed. Participants showed faster 30 m sprint times following sled towing (
= 0.005). Running velocity was significantly higher in EXP at 5-10 m (
= 0.032), 10-15 m (
= 0.006), 15-20 m (
= 0.004), 20-25 m (
= 0.015) and 25-30 m (
= 0.014). No significant changes in sprint mechanical variables and kinematics were observed. Heavy sled towing appeared to be an effective post-activation potentiation stimulus to acutely enhance sprint acceleration performance with no effect on the athlete's running technique.
This study elucidated kinetic and kinematic changes between control and weighted vest sprinting with a load of 7% body mass. Fourteen male sprinters completed 60 m control and vest sprints over a ...long force platform system. Step-to-step ground reaction force and spatiotemporal variables were grouped, representing the initial acceleration (1st–4th steps), middle acceleration (5th–14th steps), later acceleration (15th step–step before maximum velocity reached) and maximum velocity (stride where maximum velocity reached) phase during each trial. Two-way ANOVA with post hoc Tukey HSD and a Cohen’s d effect size with 95% confidence intervals elucidated the difference between trials and phases. Between control and vest trials the velocity decreased (3.41–3.78%) through trivial–small step length (1.95–2.72%) and frequency (0.87–1.54%) decreases. Vertical impulse increased (6.46–6.78%) through moderate support time increases (4.84–6.00%), coupled with no effective vertical mean force differences during the vest trial, compared to the control. There was no significant interaction between trials and phases. Therefore, although weighted vest trials did not increase vertical mean force production, vests did induce an increased vertical force application duration during the support phase step-to-step while supporting a larger total load (body mass plus vest mass).
PURPOSE The purpose of this study is to verify the effect of soft tissue stiffness on joint range of motion and athletic performance in soccer players. METHODS Fifteen adult male soccer players ...participated in the study. After the warm-up, calf muscle and Achilles tendon stiffness were measured. Subsequently, range of motion of the ankle joint and 30 m sprint and vertical jump were performed. Exercise performance was assessed as a field test to create an experimental environment similar to that of actual training and competition. RESULTS Achilles tendon stiffness showed a significant correlation with the 30 m sprint and the vertical jump (p<.05). A moderate correlation was observed between the 30 m sprint and the vertical jump(p<.01). Soleus muscle stiffness was significantly correlated with the 30 m sprint(p<.05). No other correlations were observed. CONCLUSIONS Therefore, it was confirmed that Achilles tendon stiffness affects exercise performance. In a follow-up study, it was necessary to confirm the effect of the stiffness of various soft tissues on exercise performance.
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