Isometric Squat Exercise Research Articles

EFFECT OF ISOMETRIC SQUAT EXERCISE ON SPRINT PERFORMANCE OF FOOTBALL PLAYERS

A soccer match makes heavy demands on both aerobic and anaerobic metabolism. Elite players run 8–12 km during a game. Nevertheless, anaerobic metabolism is also crucial in sprints, jumps, and tackles. Many studies have stated that aerobic and anaerobic strength are significant features in soccer games. During a soccer match, soccer team members performed 60 to 70 runs from 12 to 15 m. Sprint running success, with or without the ball, is therefore a significant factor that can explain a winning team's supremacy. In essential ball duals, sprint could be key. In certain cases, the player should be quicker and more effective than the opponent to score goals or to avoid goals being scored. In addition, acceleration and speed can enhance skills vital to soccer, such as turning, sprinting, and changing tempo, by improving strength in appropriate muscles or muscle groups. The study was to evaluate the effect of isometric squat exercise on sprint performance of football players. The sample of 60 student were selected from the population of University of Lahore football team. Within 3 to 5 days after base training pre-test will be conducted in the morning by using 40-yard dash test. Post-test will be conducted after completion of Isometric Squat exercise training sessions. The results show that, differences between the two test 40 Yard Dash Test Post-Test of Experimental Group and 40 Yard Dash Test Post-Test of Control Group. This research study discovered that there was a statistically significant improvement in sprint performance by using Isometric Squat exercise Program.

Power of Words: Influence of Preexercise Information on Hypoalgesia after Exercise—Randomized Controlled Trial

Exercise increases pressure pain thresholds (PPT) in pain-free individuals, known as exercise-induced hypoalgesia (EIH). Positive preexercise information can elicit higher EIH responses, but the effect of positive versus negative preexercise information on EIH is unknown. The primary aim of this randomized controlled trial was to compare EIH at the exercising thigh muscle after an isometric squat exercise between individuals receiving positive versus negative preexercise information about the effect of exercise on pain. Secondary aims were to compare EIH at nonexercising muscles between groups, and to investigate the relationship between participants' expectations and EIH. Eighty-three participants were randomly assigned to brief positive (n = 28), neutral (n = 28) or negative (n = 27) verbal information. The neutral information group was included in the study as a reference group. Pressure pain thresholds at the thigh and trapezius muscles were assessed before and after the intervention (i.e., preexercise information+squat exercise). Expectations of pain relief were assessed using a numerical rating scale (-10 [most negative] to 10 [most positive]). Change in quadriceps and trapezius PPT after the squat exercise showed a large difference between the positive and negative information groups (quadriceps, 102 kPa; 95% confidence interval, 55-150; effect size, 1.2; trapezius, 41 kPa; 95% confidence interval, 16-65; effect size:, 0.9). The positive information group had a 22% increase in quadriceps PPT whereas the negative information group had a 4% decrease. A positive correlation was found between expectations and increase in PPT. Negative preexercise information caused hyperalgesia after the wall squat exercise, whereas positive or neutral preexercise information caused hypoalgesia. Positive preexercise information did not change the magnitude of EIH compared with neutral information.

Investigating the Immediate and Cumulative Effects of Isometric Squat Exercise for Different Weight Loads on Intraocular Pressure: A Pilot Study.

The execution of resistance exercise against heavy loads promotes an acute intraocular pressure (IOP) rise, which has detrimental effects on ocular health. However, the effect of load on the IOP behavior during exercise remains unknown due to technical limitations. IOP monitoring during isometric squat exercise permits assessment of IOP behavior during physical effort. Second, greater loads will induce a higher IOP rise. Randomized cross-sectional study. Level 2. Twenty-six young adults (13 women, 13 men) performed an isometric squat exercise against 3 loads relative to their maximum capacity (low, medium, and high). IOP was measured before, during (1 measurement every 6 seconds), and after exercise (10 seconds of recovery). There was a progressive IOP rise during exercise, which was dependent on the load applied (Bayes factor10 >100). Higher IOP values were found in the high load condition in comparison with the medium (mean IOP difference = 1.5 mm Hg) and low (mean IOP difference = 3.1 mm Hg) conditions, as well as when the medium load was compared with the low load condition (mean IOP difference = 1.6 mm Hg). Men reached higher IOP values in comparison with women during the last measurements in the high load condition. Ten seconds of recovery were enough to obtain IOP values similar to baseline levels. Isometric squat exercise induces an immediate and cumulative IOP elevation, which is positively associated with the load applied. These IOP increments return to baseline values after 10 seconds of recovery, and men demonstrate a more accentuated IOP rise in comparison with women when high levels of effort are accumulated. These findings may help in better management of different ocular conditions and highlight the importance of an individualized exercise prescription in clinical populations.

The effect of stance width on electromyographic response of vastus medialis oblique and vastus lateralis muscle during isometric squat exercise

The purpose of this study is to compare and analyze the degree of muscle activity according to the width of the stance. This study will select 8 male students in their twenties who have a weight training course and who have had no physical disease in more than 3 years. The squat movement behavior will be measured at the subject's 80% 0RM weight and will measure the MVIC with isometric contraction for 5 seconds on the conditional stance. First, the muscle activity of the rectus femoris, vastus medialis, and vastus intermedius tended to be higher in the order of narrow stance-standard stance-wide stance. Second, muscle activity of biceps femoris, gastrocnemius, and soleus tend to increase in the order of wide stance-standard stance-narrow stance. The wider the stance, the greater the stability, the less the legs are used, the more the hips are used.

EXERCÍCIO PREPARATÓRIO DE FORÇA ISOMÉTRICO AUMENTA O DESEMPENHO DE POTÊNCIA MUSCULAR DE JUDOCAS

Muscular power, a determinant in judo fights, can be developed by high intensity strength exercises through a mechanism known as post-activation potentiation. Thus, the objective of the present study is to verify the effect of isometric squat exercise on the performance of judo athletes. The sample was made up of eight judo athletes (22.3 ± 3.5 years old, 166.0 ± 6.0 cm; 65.4 ± 7.0 kg). The subjects went through four days of tests, one familiarization session, another as a control situation and two others as experimental sessions. In the experimental sessions, exercises in a Smith squat machine prior to the vertical countermovement jump (CMJ) test and a Special Judo Fitness Test (SJFT). In the control session, only SJFT was performed. Student's t test for paired samples was used to compare performances in the different situations. A significant increase was observed in the number of projections in the SJFT (25.5 ± 2.2 vs. 26.8 ± 2.2 projections) after MVIC and in the height in CMJ (31.0 ± 2.2 vs. 33.3 ± 2.2 cm). The MVIC exercise protocol performed as a preparatory activity increased the performance of judo athletes in judo-specific tests/SJFT and CMJ.

Isometric Exercise to Reduce Pain in Patellar Tendinopathy In-Season: Is It Effective "on the Road"?

To investigate the effectiveness of an isometric squat exercise using a portable belt, on patellar tendon pain and function, in athletes during their competitive season. Case series with no requirements to change any aspect of games or training. The object of this pragmatic study was to investigate this intervention in addition to "usual management." A control or sham intervention was considered unacceptable to teams. In-season. A total of 25 male and female elite and subelite athletes from 5 sports. 5 × 30-second isometric quadriceps squat exercise using a rigid belt completed over a 4-week period. (1) single-leg decline squat (SLDS)-a pain provocation test for the patellar tendon (numerical rating score of pain between 0 and 10), (2) VISA-P questionnaire assessing patellar tendon pain and function, and (3) self-reported adherence with completing the exercise over a 4-week period. Baseline SLDS pain was high for these in-season athletes, median 7.5/10 (range 3.5-9) and was significantly reduced over the 4-week intervention (P < 0.001, ES r = 0.580, median change 3.5). VISA-P scores improved after intervention (P < 0.001, ES r = 0.568, mean change 12.2 ± 8.9, percentage mean change 18.8%, where minimum clinical important difference of relative change for VISA-P is 15.4%-27%). Adherence was high; athletes reported completing the exercise 5 times per week. This pragmatic study suggests that a portable isometric squat reduced pain in-season for athletes with patellar tendinopathy (PT). This form of treatment may be effective, but clinical trials with a control group are needed to confirm the results.

Whole‐body vibration does not influence knee joint neuromuscular function or proprioception

This study examined the acute effects of whole-body vibration (WBV) on knee joint position sense and indices of neuromuscular function, specifically strength, electromechanical delay and the rate of force development. Electromyography and electrically evoked contractions were used to investigate neural and contractile responses to WBV. Fourteen healthy males completed two treatment conditions on separate occasions: (1) 5 × 1 min of unilateral isometric squat exercise on a synchronous vibrating platform [30 Hz, 4 mm peak-to-peak amplitude] (WBV) and (2) a control condition (CON) of the same exercise without WBV. Knee joint position sense (joint angle replication task) and quadriceps neuromuscular function were assessed pre-, immediately-post and 1 h post-exercise. During maximum voluntary knee extensions, the peak force (PF(V)), electromechanical delay (EMD(V)), rate of force development (RFD(V)) and EMG of the quadriceps were measured. Twitch contractions of the knee extensors were electrically evoked to assess EMD(E) and RFD(E). The results showed no influence of WBV on knee joint position, EMD(V), PF(V) and RFD(V) during the initial 50, 100 or 150 ms of contraction. Similarly, electrically evoked neuromuscular function and neural activation remained unchanged following the vibration exercise. A single session of unilateral WBV did not influence any indices of thigh muscle neuromuscular performance or knee joint proprioception.