Does delayed onset muscle soreness affect the biomechanical variables of the drop vertical jump that have been associated with increased ACL injury risk? A randomised control trial

2021 ◽  
Vol 76 ◽  
pp. 102772
Author(s):  
Matthew C. Look ◽  
Yogita Iyengar ◽  
Massimo Barcellona ◽  
Adam Shortland
Keyword(s):  
Injury Risk ◽  
Muscle Soreness ◽  
Vertical Jump ◽  
Acl Injury ◽  
Delayed Onset Muscle Soreness ◽  
Randomised Control Trial ◽  
Delayed Onset ◽  
Acl Injury Risk ◽  
Drop Vertical Jump

scholarly journals Physician And Non-physician Inter- And Intra-observer Reliability Of A Field-based Drop Vertical Jump Screening Test For ACL Injury Risk

2015 ◽  
Vol 3 (7_suppl2) ◽  
pp. 2325967115S0009 ◽  
Author(s):  
Lauren H. Redler ◽  
Jonathan P. Watling ◽  
Elizabeth R. Dennis ◽  
Eric F. Swart ◽  
Christopher S. Ahmad
Keyword(s):  
Screening Test ◽  
Injury Risk ◽  
Vertical Jump ◽  
Acl Injury ◽  
Observer Reliability ◽  
Acl Injury Risk ◽  
Drop Vertical Jump

Reliability of a field-based drop vertical jump screening test for ACL injury risk assessment

2016 ◽  
Vol 44 (1) ◽  
pp. 46-52 ◽  
Author(s):  
Lauren H. Redler ◽  
Jonathan P. Watling ◽  
Elizabeth R. Dennis ◽  
Eric Swart ◽  
Christopher S. Ahmad
Keyword(s):  
Risk Assessment ◽  
Screening Test ◽  
Injury Risk ◽  
Vertical Jump ◽  
Acl Injury ◽  
Acl Injury Risk ◽  
Drop Vertical Jump

scholarly journals Influence of low-level laser therapy on vertical jump in sedentary individuals

2015 ◽  
Vol 13 (1) ◽  
pp. 41-46 ◽  
Author(s):  
Camila Mayumi Martin Kakihata ◽  
Jéssica Aline Malanotte ◽  
Jessica Yumie Higa ◽  
Tatiane Kamada Errero ◽  
Sandra Lucinei Balbo ◽  
...  
Keyword(s):  
Muscle Soreness ◽  
Vertical Jump ◽  
Delayed Onset Muscle Soreness ◽  
Triceps Surae ◽  
Low Level Laser Therapy ◽  
Laser Applications ◽  
Low Intensity ◽  
Delayed Onset ◽  
Significant Difference ◽  
Intensity Laser

Objective To investigate the effects of low intensity laser (660nm), on the surae triceps muscle fatigue and power, during vertical jump in sedentary individuals, in addition to delayed onset muscle soreness. Methods We included 22 sedentary volunteers in the study, who were divided into three groups: G1 (n=8) without performing low intensity laser (control); G2 (n=7) subjected to 6 days of low intensity laser applications; and G3 (n=7) subjected to 10 days of low intensity laser applications. All subjects were evaluated by means of six evaluations of vertical jumps lasting 60 seconds each. In G2 and G3, laser applications in eight points, uniformly distributed directly to the skin in the region of the triceps surae were performed. Another variable analyzed was the delayed onset muscle soreness using the Visual Analog Scale of Pain. Results There was no significant difference in fatigue and mechanical power. In the evaluation of delayed onset muscle soreness, there was significant difference, being the first evaluation higher than the others. Conclusion The low intensity laser on the triceps surae, in sedentary individuals, had no significant effects on the variables evaluated.

scholarly journals JUMP LANDING MECHANICS OF ADOLESCENT ATHLETES DURING AGES OF PEAK ACL INJURY RISK: IDENTIFYING SEX DIFFERENCES WITH A PORTABLE MOTION SENSOR

2019 ◽  
Vol 7 (3_suppl) ◽  
pp. 2325967119S0002
Author(s):  
Brad W. Willis ◽  
Seth Sherman ◽  
Trevor Gulbrandsen ◽  
Scott M. Miller ◽  
Nathan Siesener ◽  
...  
Keyword(s):  
Sex Differences ◽  
Injury Risk ◽  
Female Athletes ◽  
Cruciate Ligament ◽  
Vertical Jump ◽  
Acl Injury ◽  
Motion Sensor ◽  
Adolescent Athletes ◽  
Acl Injury Risk ◽  
Anterior Cruciate

Background: Anterior cruciate ligament (ACL) injury rates in adolescent female athletes are 3x greater than males, with peak incidence at 16 and 17 years of age for girls and boys, respectively. As increased knee valgus during a jump landing task has been linked to ACL injury risk, portable motion capture devices offer capabilities of widespread screening to enable targeted prevention programs. Studies examining sex differences in dynamic landing strategies using portable motion capture devices are limited, as many investigations utilize marker-based equipment prohibitive to space, cost and time. Our multidisciplinary team has previously validated a portable markerless motion sensor to determine the knee-ankle-separation-ratio (KASR) at initial contact (IC) and peak flexion (PF) of the drop vertical jump (DVJ). The KASR compares the horizontal distance between knee and ankle joint centers. The purpose of this study is to determine if a portable motion sensor will detect sex differences in KASR at IC and PF during the DVJ when comparing adolescent athletes at ages of peak ACL injury risk. We hypothesize that a portable motion sensor will detect sex differences in the KASR at IC and PF during the DVJ in adolescent athletes during ages of peak ACL injury risk. Methods: A total of 42 healthy adolescent athletes participated. Groups included 16 year-old females (n=26, mean height=65.5±2.9 inches, mean weight=135.9±22.1 pounds) and 17 year-old males (n=16, mean height=70.9±2.9 inches, mean weight=159.2±18.6 pounds). Instructions and demonstration of the DVJ were provided prior to recording, utilizing a 31 cm high jump platform. Participants completed the DVJ by dropping to the ground, followed by an immediate maximal vertical jump as if going for a basketball rebound (Figure 1). Three DVJ were completed, measured by a single portable markerless motion sensor with customized software calculating KASR at IC and PF. The camera was positioned one meter high and three meters in the front of the participant. A three-trial average was utilized for analyses. A KASR of 1.0 signifies the knees being directly over the ankles during landing, with < 1 and > 1 representing dynamic knee valgus and varus, respectively. Sex differences between KASR at IC and PF were analyzed using an independent samples t-test with significance at p<0.05. Results: Adolescent female athletes demonstrated lower KASR values at IC (female=0.98±0.12, male=1.07±0.11, p=0.02) and PF (female=1.01±0.15, male=1.15±0.21, p=0.03) during the DVJ as compared to males. Conclusions/Significance: A portable motion sensor found sex differences in landing mechanics among adolescent athletes during peak ages of ACL injury risk, offering potential for widespread screening and targeted ACL injury prevention programs. The identification of potential ACL injury risk factors, using portable motion sensor technology to inform individually directed prevention programs, may offer declines in health care cost and long-term disability of youth athletes. References: Beck NA, Lawrence JTR, Nordin JD, DeFor TA, Tompkins M. ACL tears in school-aged children and adolescents over 20 years. Pediatrics. 2017; 139(3): e20161877. Mentiplay BF, Hasanki K, Perraton LG< Pua YH, Charlton PC, Clark RA. Three-dimensional assessment of squats and drop jumps using the Microsoft Xbox One Kinect: reliability and validity. J Sports Sci. 2018; 1:1-8. Ford, KR, Myer, GD, Hewett, TE. Reliability of landing 3D motion analysis: implications for longitudinal analyses. Med Sci Sports Exerc. 2007;39:2021-2028. Sugimoto D, Myer GD, McKeon JM, Hewett TE. Evaluation of the effectiveness of neuromuscular training to reduce anterior cruciate ligament injury in female athletes: a critical review of relative risk reduction and numbers-needed-to-treat analyses. Br J Sports Med. 2012; 46: 979-988. Ortiz, A, Rosario-Canales, M, Rodriguez, A, Seda, A, Figueroa, C, Venegas-Rios, H. Reliability and concurrent validity between two-dimensional and three-dimensional evaluations of knee valgus during drop jumps. Open Access J Sports Med. 2016;7:65-73. Mizner RL, Chmielewski TL, Toepke JJ, Tofte KB. Comparison of two-dimensional measurement techniques for predicting knee angle and moment during a drop vertical jump.” Clin J Sports Med. 2012; 22(3): 221-227. Hewett TE, Myer GD, Ford KR, et al. Biomechanical measures of neuromuscular control and valgus loading of the knee predict anterior cruciate ligament injury risk in female athletes: a prospective study,” Am J Sports Med. 2005; 33:492-501. Gray AD, Willis BW, Skubic M, et al. Development and validation of a portable and inexpensive tool to measure the drop vertical jump using the microsoft kinect V2. Sports Health. 2017; 9(6):537-544.

scholarly journals The effect of aquatic and land plyometric training on the vertical jump and delayed onset muscle soreness in brazilian soccer players

2017 ◽  
Vol 18 (5) ◽  
Author(s):  
Renato Tavares Fonseca ◽  
Rodolfo De Alkmim Moreira Nunes ◽  
Juliana Brandão Pinto de Castro ◽  
Vicente Pinheiro Lima ◽  
Sérgio Gregorio Silva ◽  
...  
Keyword(s):  
Body Mass ◽  
Muscle Soreness ◽  
Vertical Jump ◽  
Delayed Onset Muscle Soreness ◽  
Soccer Players ◽  
Control Group ◽  
Plyometric Training ◽  
Delayed Onset ◽  
Post Test ◽  
And Control

AbstractPurpose. To compare the effects of aquatic and land plyometric training on the vertical jump (VJ) and delayed onset muscle soreness (DOMS) in soccer players. Methods. Twenty-four male soccer players aged 16-18 years (16.53 ± 0.5 years) were randomly divided into three groups: aquatic plyometric training (APT) (n = 8; age: 16.4 ± 0.4 years; body mass: 68.3 ± 7.54 kg; height: 179.75 ± 8.13 cm); land plyometric training (LPT) (n = 8; age: 16.5 ± 0.5 years; body mass: 68.2 ± 7.8 kg; height: 177.0 ± 7.4 cm); and control group (n = 8; age: 16.7 ± 0.6 years; body mass: 61.2 ± 6.5 kg; height: 171.43 ± 5.75 cm), not performing any jump program. An identical training program was applied for 6 weeks, totalling 944 jumps. The VJ was evaluated on a leap jump platform and the Visual Analogue Scale measured the change in DOMS perception. Results. There was a significant increase in the VJ height in both experimental groups (LPT and APT) (p < 0.05). A significant reduction in DOMS perception was verified for the APT group in comparison with the LPT group (p < 0.05) between the first and last week of training. The foot contact time significantly decreased (p < 0.05) in the APT group from pre- to posttest. Significant improvements (p < 0.05) were observed in the flight time and jump speed from pre- to post-test in both LPT and APT groups. Conclusions. APT can increase the VJ height and reduce DOMS perception in soccer players.

scholarly journals Electromyographic Assessment of Anterior Cruciate Ligament Injury Risk in Male Tennis Players: Which Role for Visual Input? A Proof-of-Concept Study

Diagnostics ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 997
Author(s):  
Alessandro de Sire ◽  
Nicola Marotta ◽  
Andrea Demeco ◽  
Lucrezia Moggio ◽  
Pasquale Paola ◽  
...  
Keyword(s):  
Anterior Cruciate Ligament ◽  
Injury Risk ◽  
Cruciate Ligament ◽  
Acl Injury ◽  
Visual Input ◽  
Proof Of Concept ◽  
Tennis Players ◽  
Concept Study ◽  
Acl Injury Risk ◽  
Anterior Cruciate

Anterior cruciate ligament (ACL) injury incidence is often underestimated in tennis players, who are considered as subjects conventionally less prone to knee injuries. However, evaluation of the preactivation of knee stabilizer muscles by surface electromyography (sEMG) showed to be a predictive value in the assessment of the risk of ACL injury. Therefore, this proof-of-concept study aimed at evaluating the role of visual input on the thigh muscle preactivation through sEMG to reduce ACL injury risk in tennis players. We recruited male, adult, semiprofessional tennis players from July to August 2020. They were asked to drop with the dominant lower limb from a step, to evaluate—based on dynamic valgus stress—the preactivation time of the rectus femoris (RF), vastus medialis, biceps femoris, and medial hamstrings (MH), through sEMG. To highlight the influence of visual inputs, the athletes performed the test blindfolded and not blindfolded on both clay and grass surfaces. We included 20 semiprofessional male players, with a mean age 20.3 ± 4.8 years; results showed significant early muscle activation when the subject lacked visual input, but also when faced with a less-safe surface such as clay over grass. Considering the posteromedial–anterolateral relationship (MH/RF ratio), tennis players showed a significant higher MH/RF ratio if blindfolded (22.0 vs. 17.0% not blindfolded; p < 0.01) and percentage of falling on clay (17.0% vs. 14.0% in grass; p < 0.01). This proof-of-principle study suggests that in case of absence of visual input or falling on a surface considered unsafe (clay), neuro-activation would tend to protect the anterior stress of the knee. Thus, the sEMG might play a crucial role in planning adequate athletic preparation for semiprofessional male athletes in terms of reduction of ACL injury risk.

scholarly journals NEURAL ACTIVITY PROFILES ASSOCIATED WITH ACL INJURY-RISK MECHANICS IN ECOLOGICAL SPORT SPECIFIC VIRTUAL REALITY

2021 ◽  
Vol 9 (7_suppl3) ◽  
pp. 2325967121S0015
Author(s):  
Dustin R. Grooms ◽  
Jed A. Diekfuss ◽  
Alexis B. Slutsky-Ganesh ◽  
Cody R. Criss ◽  
Manish Anand ◽  
...  
Keyword(s):  
Motor Control ◽  
Neural Activity ◽  
Injury Risk ◽  
Neural Control ◽  
Acl Injury ◽  
Initial Contact ◽  
Leg Press ◽  
Visual Spatial ◽  
Peak Knee ◽  
Acl Injury Risk

Background: Anterior cruciate ligament (ACL) injury is secondary to a multifactorial etiology encompassing anatomical, biological, mechanical, and neurological factors. The nature of the injury being primarily due to non-contact mechanics further implicates neural control as a key injury-risk factor, though it has received considerably less study. Purpose: To determine the contribution of neural activity to injury-risk mechanics in ecological sport-specific VR landing scenarios. Methods: Ten female high-school soccer players (15.5±0.85 years; 165.0±6.09 cm; 59.1±11.84 kg) completed a neuroimaging session to capture neural activity during a bilateral leg press and a 3D biomechanics session performing a header within a VR soccer scenario. The bilateral leg press involved four 30 s blocks of repeated bilateral leg presses paced to a metronome beat of 1.2 Hz with 30 s rest between blocks. The VR soccer scenario simulated a corner-kick, requiring the participant to jump and head a virtual soccer ball into a virtual goal (Figure 1A-E). Initial contact and peak knee flexion and abduction angles were extracted during the landing from the header as injury-risk variables of interest and were correlated with neural activity. Results: Evidenced in Table 1 and Figure 1 (bottom row), increased initial contact abduction, increased peak abduction, and decreased peak flexion were associated with increased sensory, visual-spatial, and cerebellar activity (r2= 0.42-0.57, p corrected < .05, z max > 3.1, table & figure 1). Decreased initial contact flexion was associated with increased frontal cortex activity (r2= 0.68, p corrected < .05, z max > 3.1). Conclusion: Reduced neural efficiency (increased activation) of key regions that integrate proprioceptive, visual-spatial, and neurocognitive activity for motor control may influence injury-risk mechanics in sport. The regions found to increase in activity in relation to higher injury-risk mechanics are typically activated to assist with spatial navigation, environmental interaction, and precise motor control. The requirement for athletes to increase their activity for more basic knee motor control may result in fewer neural resources available to maintain knee joint alignment, allocate environmental attention, and handle increased motor coordination demands. These data indicate that strategies to enhance efficiency of visual-spatial and cognitive-motor control during high demand sporting activities is warranted to improve ACL injury-risk reduction. [Figure: see text][Table: see text]

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