scholarly journals Effects of a Low-Load Gluteal Warm-Up on Explosive Jump Performance

2015 ◽  
Vol 46 (1) ◽  
pp. 177-187 ◽  
Author(s):  
Thomas Comyns ◽  
Ian Kenny ◽  
Gerard Scales
Keyword(s):  
Repeated Measures ◽  
Reaction Force ◽  
Force Production ◽  
Peak Power Output ◽  
Future Research ◽  
Jump Performance ◽  
Squat Jump ◽  
Warm Up ◽  
Low Load ◽  
Squat Jumps

AbstractThe purpose of this study was to investigate the effects of a low-load gluteal warm-up protocol on countermovement and squat jump performance. Research by Crow et al. (2012) found that a low-load gluteal warm-up could be effective in enhancing peak power output during a countermovement jump. Eleven subjects performed countermovement and squat jumps before and after the gluteal warm-up protocol. Both jumps were examined in separate testing sessions and performed 30 seconds, and 2, 4, 6 & 8 minutes post warm-up. Height jumped and peak ground reaction force were the dependent variables examined in both jumps, with 6 additional variables related to fast force production being examined in the squat jump only. All jumps were performed on a force platform (AMTI OR6-5). Repeated measures analysis of variance found a number of significant differences (p ≤ 0.05) between baseline and post warm-up scores. Height jumped decreased significantly in both jumps at all rest intervals excluding 8 minutes. Improvement was seen in 7 of the 8 recorded SJ variables at the 8 minute interval. Five of these improvements were deemed statistically significant, namely time to peak GRF (43.0%), and time to the maximum rate of force development (65.7%) significantly decreased, while starting strength (63.4%), change of force in first 100 ms of contraction (49.1%) and speed strength (43.6%) significantly increased. The results indicate that a gluteal warm-up can enhance force production in squat jumps performed after 8 minutes recovery. Future research in this area should include additional warm-up intervention groups for comparative reasons.

Roller Massage Prior to Running Does Not Affect Gait Mechanics in Well-Trained Runners

2021 ◽  
pp. 1-9
Author(s):  
Jessica G. Hunter ◽  
Gina L. Garcia ◽  
Sushant M. Ranadive ◽  
Jae Kun Shim ◽  
Ross H. Miller
Keyword(s):  
Repeated Measures ◽  
Reaction Force ◽  
Force Production ◽  
Endurance Athletes ◽  
Jump Height ◽  
Jump Performance ◽  
Average Load ◽  
Load Rate ◽  
Free Moment ◽  
Muscle Force Production

Context: Understanding if roller massage prior to a run can mitigate fatigue-related decrements in muscle force production during prolonged running is important because of the association between fatigue and running-related injury. Objective: The authors investigated whether a bout of roller massage prior to running would (1) mitigate fatigue-related increases in vertical average load rate and free moment of the ground reaction force of running and (2) mitigate decreases in maximal countermovement jump height. Design: Repeated-measures study. Setting: Laboratory. Participants: A total of 14 recreational endurance athletes (11 men and 3 women) volunteered for the study. Interventions: A 12.5-minute foam roller protocol for the lower extremities and a fatiguing 30-minute treadmill run. Main Outcome Measures: Vertical average load rate, free moment, and maximal jump height before (PRE) and after (POST) the fatiguing treadmill run on separate experimental days: once where participants sat quietly prior to the fatiguing run (REST) and another where the foam roller protocol was performed prior to the run (ROLL). Results: A 2-way multiple analysis of variance found no significant differences in vertical average load rate, free moment, and jump height between PRE/POST times in both REST/ROLL conditions. Conclusions: The authors concluded that recreational endurance athletes maintain running mechanics and jump performance after a fatiguing run regardless of prerun roller massage and may not rely on prerun roller massage as a form of injury prevention.

scholarly journals Post-Activation Potentiation on Squat Jump Following Two Different Protocols: Traditional vs. Inertial Flywheel

2019 ◽  
Vol 69 (1) ◽  
pp. 271-281 ◽  
Author(s):  
Rafael Timon ◽  
Silvia Allemano ◽  
Marta Camacho-Cardeñosa ◽  
Alba Camacho-Cardeñosa ◽  
Ismael Martinez-Guardado ◽  
...  
Keyword(s):  
Repeated Measures ◽  
Rest Interval ◽  
Significant Interaction Effect ◽  
Jump Performance ◽  
Physically Active ◽  
Squat Jump ◽  
Warm Up ◽  
Squat Exercise ◽  
Eccentric Actions ◽  
Effect Time

Abstract Post‐activation potentiation (PAP) has been defined as a major enhancement of muscular performance following a preload stimulus. The eccentric actions seem to cause a potentiating effect on subsequent explosive exercises. The aim of this study was to determine whether a protocol of squat exercise using an inertial flywheel could have a potentiating effect on jump performance. Sixteen physically active volunteers participated in the study (age: 21.8 ± 2.7 years; body mass index: 23.6 ± 3). All participants completed two different protocols on separate days: a Traditional Protocol (using a half squat with a guided barbell) and an Inertial Flywheel Protocol (using a half squat with an inertial flywheel). Both protocols were similar and consisted of 3 x 6 reps at the load that maximized power, with a 3‐minute rest interval between sets. The squat jump (SJ) was measured by a contact platform at baseline, and four, eight and twelve minutes after the PAP stimulus. A two‐way ANOVA with repeated measures was performed to analyze significant differences over time. There were significant increases of SJ height (p = 0.004, d = 0.665), velocity (p = 0.003, d = 0.688) and power (p = 0.004, d = 0.682) from baseline after the inertial flywheel protocol. A significant interaction effect (time x protocol) was observed, showing that the inertial flywheel protocol had a potentiating effect on the jump performance compared to the traditional protocol, more specifically at 4 and 8 minutes after the PAP stimulus. In conclusion, the inertial flywheel protocol showed a potentiating effect on the squat jump performance, thus this pre‐ conditioning activity could be useful during the warm‐up before the competition.

The Post-Activation Potentiation Effect on Squat Jump Performance: Age and Sex Effect

2014 ◽  
Vol 26 (2) ◽  
pp. 187-194 ◽  
Author(s):  
Fotini Arabatzi ◽  
Dimitrios Patikas ◽  
Andreas Zafeiridis ◽  
Konstantinos Giavroudis ◽  
Theodoros Kannas ◽  
...  
Keyword(s):  
Pediatric Population ◽  
Reaction Force ◽  
Conditioning Stimulus ◽  
Vertical Ground Reaction Force ◽  
Jump Performance ◽  
Squat Jump ◽  
Potentiation Effect ◽  
Males And Females ◽  
And Control ◽  
Age And Sex

This study examined the post-activation potentiation (PAP) effects on squat jump (SJ) performance and on peak rate of force development (RFDpeak) in preadolescent (10–12 y), adolescents (14–15 y) and adults (20–25 y) males and females. All participants performed a SJ with and without prior conditioning stimulus (PAP and control protocol, respectively), consisting of 3 × 3-second maximal isometric squats. Jump height and RFDpeak of the vertical ground reaction force during SJ were assessed before, and at 20 seconds and at 4 minutes following the conditioning stimulus. The results revealed a different pattern of age-effect on SJ performance within males and females. The RFDpeak significantly increased as a factor of age in both males and females (P < .05). Increase in SJ performance after conditioning stimulus occurred only in men (P < .05), with no effects in teen-males, boys, and female groups. There was a significant PAP effect on RFDpeak in both adult groups (P < .05) and teen-males, with no effects in children. In conclusion, the PAP effects on SJ performance and RFDpeak are age- and sex-dependent; that is PAP appears as a viable method for acutely enhancing SJ performance in men but not in pediatric population.

scholarly journals Acute Effects Of Different Stretching Durations on Vertical Jump Performance in Rhythmic Gymnasts

2018 ◽  
Vol 3 (82) ◽  
Author(s):  
Nuriye Özengin ◽  
Necmiye Ün Yıldırım ◽  
Gül Baltacı ◽  
Nerijus Masiulis
Keyword(s):  
Repeated Measures ◽  
Vertical Jump ◽  
Effective Means ◽  
Anaerobic Power ◽  
Static Stretching ◽  
Jump Performance ◽  
Warm Up ◽  
Rhythmic Gymnastics ◽  
Rhythmic Gymnasts ◽  
Stretching Exercises

Research background. Stretching is believed to enhance performance, reduce injury, and be an effective means of developing flexibility and alleviating muscular soreness (Shellock, Prentice, 1985; Brandy et al., 1997). A review of the current literature shows that the results of many studies conflict with others; some report that static stretching diminishes vertical jum (VJ) performance (Cornwell et al., 2001; McNeal, Sands, 2003; Wallmann et al., 2005), whereas others report that static stretching has no effect at all on VJ (Church et al., 2001; Power et al., 2004; Unick et al., 2005). Research aim, was to examine the effects of different durations of stretching on performance and to find the stretching durations that affect the performance negatively or positively. Research methods. The subjects of the study were 27 rhythmic gymnasts with the mean age of 10.00 ± 1.2 years. The subjects as a whole group participated in two different stretching programs on nonconsecutive days to eliminate the effect of individual differences on the performance. On the first day, athletes were asked to warm up by 5 minute jogging after the pretest was administered. The posttest measured the vertical jump performance after athletes stayed inactive for 20 minutes. They rested for a day and on the third day, their performance was measured again. After the 5 minute warm-up period, 10 repetitions of 15 seconds static stretching exercises for hip flexor, hamstring and gastrocnemius muscle groups were followed by the posttest. Moreover, on the fifth day 30-second exercises were repeated five times on the same type of muscles. The participants in this investigation were tested in individual vertical jump performances following warm-up only, warm-up plus 15 seconds static stretching, and warm-up plus 30 seconds. Research results. Results of a one-way repeated-measures ANOVA indicated a nonsignificant difference for vertical jump performance (F = 2.052; p > 0.05). Discussion and conclusions. Stretching exercises are referred in rhythmic gymnastics more intensively than other sports. Relevant literature displays fewer stretching repetitions and durations. These durations and repetitions may not be realistic and practical for rhythmic gymnasts. Therefore, the durations and repetitions utilized in this study are considered more appropriate for rhythmic gymnastics trainings. Rhythmic gymnasts may make use of duration and repetitions determined in this study that will not affect their performance.Keywords: anaerobic power, gymnastics, exercise.

scholarly journals The effects of cluster-set and traditional-set post activation potentiation protocols on vertical jump performance

2019 ◽  
Author(s):  
Antonio Dello Iacono ◽  
Marco Beato ◽  
Israel Halperin
Keyword(s):  
Vertical Jump ◽  
Muscular Fatigue ◽  
Superior Performance ◽  
Acute Effects ◽  
Countermovement Jump ◽  
Basketball Players ◽  
Jump Performance ◽  
Warm Up ◽  
Cluster Set ◽  
Squat Jumps

Purpose. To compare the acute effects of two post activation potentiation (PAP) protocols using traditional or cluster-set configurations on countermovement jump (CMJ) performance. Methods. Twenty-six male basketball players were evaluated on three occasions separated by 72 hours. On the first session, athletes performed barbell squat jumps with progressively heavier loads to determine their individual optimum power loads. On the second and third sessions, athletes completed two PAP protocols in a randomized, counterbalanced order: 3 sets of 6 repetitions of squat jumps using optimum power loads performed with either a traditional (no inter-repetition rest) or a cluster-set (20 s rest every 2 repetitions) configurations. After a comprehensive warm-up, CMJ height was measured using a force platform before, 30 s, 4 min, and 8 min after completing the PAP protocols. Results. While at post-30 s athletes jumped lower compared to baseline in both conditions, jump heights were 0.71 cm higher following the cluster-set compared to the traditional condition (95% CI: 0.37, 1.05 cm). While athletes jumped higher compared to baseline at post-4 and post-8 min in both conditioning, jump heights were higher following the cluster-set compared to the traditional condition in post-4 min by 1.33 cm (95% CI: 1.02, 1.65 cm) and in post-8 min by 1.64 cm (95% CI: 1.41, 1.88 cm). Conclusions. Both traditional and cluster-set configurations induced a PAP response in vertical jump performance using optimum power loaded squat jumps, but the cluster-set configuration led to superior performance likely due to the reduced accumulation of muscular fatigue.

scholarly journals ACUTE EFFECT OF DIFFERENT WARM-UP INTERVENTIONS ON NEUROMUSCULAR PERFORMANCE OF RECREATIONAL SOCCER PLAYERS

2017 ◽  
Vol 25 (3) ◽  
pp. 43
Author(s):  
Bernardo Neme Ide ◽  
Alexandre Moreira ◽  
Bradley Jon Schoenfeld ◽  
Leandro Lodo ◽  
Audrei Dos Reis Santos ◽  
...  
Keyword(s):  
Exercise Intervention ◽  
Acute Effect ◽  
Soccer Players ◽  
Jump Performance ◽  
Squat Jump ◽  
Warm Up ◽  
Exercise Interventions ◽  
Neuromuscular Performance ◽  
Recreational Athletes ◽  
Counter Movement Jump

Pre-exercises interventions are frequently implemented in order to maximize athletic performance. In this sense, the aim of this study was to evaluated the effect of three distinct pre-exercise interventions on acute neuromuscular performance in recreational soccer players: 1) parallel squat; 2) static stretching; and 3) ballistic stretching. After all interventions, participants performed a flexibility evaluation (sit-and-reach-test), followed by a squat jump, a counter-movement jump and a 30 meter-sprint test. A one-way analysis of variance revealed: a) a significant decrease in jumping performance was induced by both Stretching conditions when compared to the parallel squat intervention; b) a significant increase in lower limb flexibility after both stretching interventions when compared to parallel squat. In conclusion, it is suggested that a pre-exercise intervention comprised of stretching exercises can acutely increase flexibility, while impairing jump performance in recreational athletes.

Analysis of Starter/Nonstarter Motor-Skill Engagement and Coaching Behaviors in Collegiate Women’s Volleyball

1994 ◽  
Vol 13 (2) ◽  
pp. 95-107 ◽  
Author(s):  
Alan C. Lacy ◽  
Donna L. Martin
Keyword(s):  
Motor Skill ◽  
Repeated Measures ◽  
Future Research ◽  
State University ◽  
Arizona State University ◽  
Warm Up ◽  
Coaching Behaviors ◽  
Observation Instrument ◽  
Starting Point ◽  
Women's Volleyball

The purpose of this study was to examine starter/nonstarter motor-skill engagement (MSE) and coaching behaviors in different segments of preseason practices in collegiate women’s volleyball. The subjects were players and coaches of eight volleyball teams. Segments of the practice were defined and coded as a warm-up, skill work, scrimmage, or conditioning. Duration recording procedures were used to collect MSE data of starters and nonstarters. Coaching behaviors were coded with interval recording procedures (5-second observe, 1-second code) using an expanded version of the Arizona State University Observation Instrument (ASUOI). A two-way repeated-measures ANOVA showed no significant differences in MSE between starters and nonstarters across the segments of the practice sessions. Results of this study offer a starting point for future research on player behaviors in the athletic environment and add to the data base of completed research on coaching behaviors.

scholarly journals Caffeinated Gel Ingestion Enhances Jump Performance, Muscle Strength, and Power in Trained Men

Nutrients ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 937 ◽  
Author(s):  
Sandro Venier ◽  
Jozo Grgic ◽  
Pavle Mikulic
Keyword(s):  
Vertical Jump ◽  
Average Power ◽  
Peak Torque ◽  
Knee Extension ◽  
Peak Power Output ◽  
Knee Extensors ◽  
Jump Performance ◽  
Squat Jump ◽  
Rowing Ergometer ◽  
Angular Velocities

We aimed to explore the effects of caffeinated gel ingestion on neuromuscular performance in resistance-trained men. The participants (n = 17; mean ± standard deviation (SD): age 23 ± 2 years, height 183 ± 5 cm, body mass 83 ± 11 kg) completed two testing conditions that involved ingesting a caffeinated gel (300 mg of caffeine) or placebo. The testing outcomes included: (1) vertical jump height in the squat jump (SJ) and countermovement jump (CMJ); (2) knee extension and flexion peak torque and average power at angular velocities of 60°·s−1 and 180°·s−1; (3) barbell velocity in the bench press with loads corresponding to 50%, 75%, and 90% of one-repetition maximum (1RM); and (4) peak power output in a test on a rowing ergometer. Compared to the placebo, caffeine improved: (1) SJ (p = 0.039; Cohen’s d effect size (d) = 0.18; +2.9%) and CMJ height (p = 0.011; d = 0.18; +3.3%); (2) peak torque and average power in the knee extensors at both angular velocities (d ranged from 0.21 to 0.37; percent change from +3.5% to +6.9%), peak torque (p = 0.034; d = 0.24; +4.6%), and average power (p = 0.015; d = 0.32; +6.7%) at 60°·s−1 in the knee flexors; (3) barbell velocity at 50% 1RM (p = 0.021; d = 0.33; +3.5%), 75% 1RM (p < 0.001; d = 0.42; +5.4%), and 90% 1RM (p < 0.001; d = 0.59, +12.0%). We conclude that the ingestion of caffeinated gels may acutely improve vertical jump performance, strength, and power in resistance-trained men.

Muscle performance during maximal isometric and dynamic contractions is influenced by the stiffness of the tendinous structures

2005 ◽  
Vol 99 (3) ◽  
pp. 986-994 ◽  
Author(s):  
Jens Bojsen-Møller ◽  
S. Peter Magnusson ◽  
Lars Raundahl Rasmussen ◽  
Michael Kjaer ◽  
Per Aagaard
Keyword(s):  
Mechanical Properties ◽  
Vastus Lateralis ◽  
Reaction Force ◽  
Muscle Performance ◽  
Jump Height ◽  
Force Transmission ◽  
Vertical Ground Reaction Force ◽  
Jump Performance ◽  
Muscle Actions ◽  
Squat Jumps

Contractile force is transmitted to the skeleton through tendons and aponeuroses, and, although it is appreciated that the mechanocharacteristics of these tissues play an important role for movement performance with respect to energy storage, the association between tendon mechanical properties and the contractile muscle output during high-force movement tasks remains elusive. The purpose of the study was to investigate the relation between the mechanical properties of the connective tissue and muscle performance in maximal isometric and dynamic muscle actions. Sixteen trained men participated in the study. The mechanical properties of the vastus lateralis tendon-aponeurosis complex were assessed by ultrasonography. Maximal isometric knee extensor force and rate of torque development (RTD) were determined. Dynamic performance was assessed by maximal squat jumps and countermovement jumps on a force plate. From the vertical ground reaction force, maximal jump height, jump power, and force-/velocity-related determinants of jump performance were obtained. RTD was positively related to the stiffness of the tendinous structures ( r = 0.55, P < 0.05), indicating that tendon mechanical properties may account for up to 30% of the variance in RTD. A correlation was observed between stiffness and maximal jump height in squat jumps and countermovement jumps ( r = 0.64, P < 0.05 and r = 0.55, P < 0.05). Power, force, and velocity parameters obtained during the jumps were significantly correlated to tendon stiffness. These data indicate that muscle output in high-force isometric and dynamic muscle actions is positively related to the stiffness of the tendinous structures, possibly by means of a more effective force transmission from the contractile elements to the bone.

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