Power and Maximum Strength Relationships During Performance of Dynamic and Static Weighted Jumps
Download Citation on ResearchGate | Relationship of power to static and dynamic strength | The purpose of this study was to determine whether static or. The Dynamic Strength Index, often known as the dynamic strength deficit, To add to this, maximal strength is strongly related to power output (r CMJ and IMTP (3); Static SJ and IMTP (5, 6); Ballistic Bench Throw and . strength relationships during performance of dynamic and static weighted jumps. Previous research has investigated the strength and power characteristics of that similar relationships between static and dynamic performance may exist.
An acceptable lift for the power clean was determined by the athlete being able to catch and hold the bar in a steady position for 3 seconds. The power clean was performed from the floor. The testing method for the split jerk exercise was slightly different due to the nature of the activity as compared to the other lifts. In addition, the subjects in this study, while they perform this lift on a regular basis, had not previously performed the split jerk maximally.
There was some concern as to both the safety and efficacy so it was determined that a 2RM would be performed as the subjects regularly train with two repetitions during normal conditioning.
- Evaluating performance
- Relationship of power to static and dynamic strength.
From the last warm-up set, loading was increased through subject feedback on level of repetition intensity so that 2RM was achieved within 3 trials. Four minutes of rest was given between each 2RM effort. A successful lift for the split jerk was determined by the subject completing two repetitions without any pressing of the bar following the jerk an ability to maintain position for 3 sections once a standing position had been re-established.
Subjects were familiar with the testing procedure because of its similarity to the testing they are exposed to as part of their sport. Each subject performed three trials with one minute of rest in between each jump and the highest jump height was used in the data analysis. The following procedure was used for each subject during data collection. The Vertec was adjusted to match the height of the individual subject by having them stand with their dominant side to the base of the testing device.
Their dominant hand was raised and the Vertec was adjusted so that their hand was the appropriate distance away from the marker based on markings on the device itself.
At that point, subjects performed a countermovement jump. Arm swings were allowed but no preparatory step was performed.Do Isometrics Build Muscle? (YES IF...)
Broad jump Standing broad jump was measured via a tape measure. Subjects were required to stand with their toes behind the zero point of the tape measure prior to jumping.
The Relationship Between Isometric and Dynamic Strength in College Football Players
Subjects were not allowed a preparatory step of any kind but arm swings were allowed at the discretion of the subject. Distance was determined measuring the point at which the heel of the trail leg touched the ground. To minimize these possible drawbacks and optimize performance gains, we proposed the use of an alternative training and testing strategy, based on barbell power production Loturco et al.
With this method, practitioners can safely determine the loads capable of maximizing bar-power output, using rapid incremental loading tests or instantaneously measuring the optimum bar-velocities Loturco et al.
To date, although a number of studies have confirmed the efficiency of the optimum power loads OPL to improve the physical performance of team sport athletes, these investigations were executed with male players of specific sport disciplines e. Knowing more about the relationships between bar-power output and the athletic abilities of both male and female athletes of different sports may lead researchers to develop new studies regarding this topic, as well as stimulate coaches to implement this strategy in their professional practices.
Moreover, the possibility of comparing the magnitude of these correlations with those related to more traditional performance measures e.
Relationship of power to static and dynamic strength.
As such, a recent study using a pooled sample of 61 elite athletes from four different sports i. Nevertheless, a more comprehensive investigation is warranted by reporting these data in a more specific way i.
An alternative strategy for estimating the influence of a given exercise on performance is examining the data provided by the median split analysis Rampinini et al.
Based on this method, practitioners can group the athletes according to their physical skills, defining the lower and upper bounds of performances in a series of assessments. Under this rationale, it seems plausible to consider that superior levels of performance in two or more measurements might be closely interconnected, representing shared and direct relations between them Loturco et al.
Thus, the aim of this study was to test and compare the interconnection between bar-power output [collected in the HS and jump squat JS exercises] and 1RM values collected in HS and a variety of sport-specific performance measures i. Materials and Methods Participants Three-hundred and three elite athletes 47 male soccer players, 58 female soccer players, 28 male handball players, 58 female handball players, 49 male rugby players, and 63 male futsal players from four different sports participated in this study.
The characteristics of the subjects are presented in Table 1. Male soccer players participated in the first division of the Paulista State Championship.
Female soccer players participated in the first division of the Brazilian National Championship and won the Libertadores da America Cup. Male and female handball players participated in the first division of the Brazilian National Championships, comprising 39 15 male and 24 female athletes of the Brazilian National Team, and 23 11 male and 12 female who participated at the Rio Olympic Games.
Rugby players were members of the Brazilian National Team comprising nine athletes who participated in the rugby sevens tournament at the Rio Olympic Games. Finally, futsal players won the Brazilian National League. Therefore, we can confirm the high level of performance of the participants in this study.
This study was carried out in accordance with the recommendations of the Anhanguera-Bandeirante Ethics Committee with written informed consent from all subjects. All subjects gave written informed consent in accordance with the Declaration of Helsinki. The protocol was approved by the Anhanguera-Bandeirante Ethics Committee. Study Design The athletes involved in this study were assessed during the competitive phase of the season and were well familiarized with testing procedures due to their constant assessments in our facilities.
Physical tests were performed on 2 consecutive days for soccer and rugby athletes and 1 day for the other athletes. For the other sports players the sequence of tests was the same, but they did not perform the 1RM test or the assessment of bar-power outputs in the HS exercise.
Participants were required to be in a fasting state for at least 2 h, avoiding caffeine and alcohol consumption for 24 h before the procedures. Prior to the tests, the athletes performed standardized warm-up protocols including general i. Between each test, a min rest interval was allowed, to explain the procedures and adjust the equipment.
In the CMJ, athletes were instructed to execute a downward movement followed by complete extension of the legs and were free to determine the countermovement amplitude to avoid changes in jumping coordination.
All jumps were executed with the hands on the hips and the athletes were instructed to jump as high as possible. A total of five attempts were allowed for each jump, interspersed by s intervals Loturco et al.
Prior to the test, subjects executed two warm-up sets, as follows: A 3-min rest interval was provided between all sets. After 3 min, athletes started the test and were allowed up to five attempts to achieve their 1RM i.
In the JS, participants executed knee flexion until the thigh was parallel to the ground and, after the command to start, jumped as fast as possible without their shoulders losing contact with the bar. The HS was executed in a similar fashion to the JS, except that the subjects were instructed to move the bar as fast as possible without losing foot contact with the ground, keeping their heels on the floor.
A 5-min rest period occurred between sets. MP-value calculated during the entire concentric phase of each repetition; MPP — value calculated during the propulsive phase, defined as that portion of the concentric action during which the measured acceleration is greater than acceleration due to gravity; PP — the highest bar-power value registered at a particular instant 1-ms during the concentric phase Sanchez-Medina et al.
The bar position data were sampled at Hz.
Linear Sprint Tests For the sprint test, rugby players performed a m sprint test, whereas the other athletes sprinted over a total distance of m. Four pairs of photocells Smart-Speed, Fusion Equipment, Brisbane, QLD, Australia were positioned at distances of zero, 5-,and m along the sprinting course, and two additional pairs were placed at and m to assess rugby players.
Sprint velocity VEL was calculated as the distance traveled over a measured time interval. The acceleration ACC capacity in the different distances i. Athletes performed two sprints, interspaced by a 5-min rest interval, and the best attempt was retained for analysis. Two maximal attempts were performed with a 5-min rest interval between attempts. Starting from a standing position with the front foot placed 0.
The fastest time from the two attempts was retained for further analysis. Schematic presentation of the change of direction speed test. The circles represent the positions of the photocells. Data normality was tested using the Shapiro—Wilk test. Athletes were divided, using a median split analysis, into two groups according to their bar-power outputs in both exercises and HS 1RM e.
Power and Maximum Strength Relationships During Performance of Dynamic and Static Weighted Jumps
The magnitude-based inferences method was used to analyze the differences between groups in the physical performance tests Batterham and Hopkins, Additionally, the magnitudes of the standardized differences were interpreted using the following thresholds: Results All data presented a normal distribution.
Table 2 shows the descriptive data of the vertical jumps, bar-power outputs in both JS and HS exercises, and 1RM in the HS exercise for the athletes of the different modalities assessed.
Table 3 demonstrates the results of the linear sprint and COD speed tests for the athletes of four different sports disciplines. Descriptive results of the vertical jumps, bar-power outputs, and one repetition maximum in the athletes of four different sports disciplines. Descriptive results of the speed tests in the different distances tested in the athletes of four different sports disciplines. Figure 3 depicts the comparisons between higher and lower groups, divided based on their bar-power outputs and 1RM in the linear and COD speed tests in the athletes from the different sports disciplines.
Figure 4 demonstrates the comparisons of the acceleration results comparing higher and lower bar-power outputs and 1RM groups in the distinct groups of athletes. The gray area represents the smallest worthwhile change SWC 0. The gray area represents the SWC 0.
Discussion This study examined the selective influences of 1RM values assessed in HS and bar-power production assessed in both HS and JS exercises on the physical performance of male and female team sport athletes of four different sports rugby, soccer, futsal, and handball. The main results reported here are: This is the first study to show this connection for the bar-power approach in a comprehensive sample of elite team sport athletes of different team sport disciplines.