1
|
Brito AV, Afonso J, Silva G, Fernandez-Fernandez J, Fernandes RJ. Biophysical characterization of the tennis serve: A systematic scoping review with evidence gap map. J Sci Med Sport 2024; 27:125-140. [PMID: 37980182 DOI: 10.1016/j.jsams.2023.10.018] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/11/2023] [Accepted: 10/29/2023] [Indexed: 11/20/2023]
Abstract
OBJECTIVES We aimed to assess the available evidence on the biophysics of the tennis serve, mapping the populations, interventions, contexts and other relevant information to highlight what is already known and to identify gaps in the literature. DESIGN Systematic scoping review with evidence gap map. METHODS The protocol was designed according to PRISMA 2020, Prisma-ScR guidelines and the Cochrane Handbook. The searches were conducted on July 20, 2022 and updated on April 1, 2023, in PubMed, Scopus and Web of Science (core collection). The risk of bias assessment was performed using the Cochranes method for nonrandomized studies (RoBANS) and a narrative synthesis of the main findings was performed and supplemented with an evidence gap map. RESULTS Most trials were found on serve kinematics and kinetics (95 %), analyzing only flat serves (84 and 72 %, respectively). Few trials focused on physiology (20 %; e.g. biomarkers), under-19, left or both-handed, female and intermediate beginner or starter players (29, 17, 8 and 7 %, respectively). We found a preponderance of low and unclear risk of bias (63 and 31 %, respectively) and only 7 % high, particularly, on the assessment of confounding variables. CONCLUSIONS The current scoping review reveals a few trials on physiological rather than biomechanical variables, as well as the absence of the kick and slice serve, foot-back and foot-up serve, and left-handed, female, and young player analyses. We did not find systematic mistakes or limitations in the design, conduct, or analysis that would distort the results, since only 7 % presented a high risk of bias.
Collapse
Affiliation(s)
- André V Brito
- Centre of Research, Education, Innovation and Intervention in Sport (CIFI(2)D) and Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sport, University of Porto, Portugal. https://twitter.com/AndreVilela1996
| | - José Afonso
- Centre of Research, Education, Innovation and Intervention in Sport (CIFI(2)D) and Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sport, University of Porto, Portugal
| | - Gonçalo Silva
- Centre of Research, Education, Innovation and Intervention in Sport (CIFI(2)D) and Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sport, University of Porto, Portugal
| | - Jaime Fernandez-Fernandez
- Faculty of Physical Education and Sports Sciences, Universidad de León, 24007 León, Spain; AMRED, Human Movement and Sports Performance Analysis, Universidad de León, 24007 León, Spain
| | - Ricardo J Fernandes
- Centre of Research, Education, Innovation and Intervention in Sport (CIFI(2)D) and Porto Biomechanics Laboratory (LABIOMEP), Faculty of Sport, University of Porto, Portugal.
| |
Collapse
|
2
|
Deniz V, Sariyildiz A, Buyuktas B, Basaran S. Comparison of the activation and mechanical properties of scapulothoracic muscles in young tennis players with and without scapular dyskinesis: an observational comparative study. J Shoulder Elbow Surg 2024; 33:192-201. [PMID: 37579939 DOI: 10.1016/j.jse.2023.07.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 07/01/2023] [Accepted: 07/10/2023] [Indexed: 08/16/2023]
Abstract
BACKGROUND In tennis athletes with scapular dyskinesis, the activation of the scapulothoracic muscles during serve is not known. Also, the mechanical properties (tone, elasticity, and stiffness) of the scapulothoracic muscles of the tennis athletes with scapular dyskinesis are likely to change. The study aimed to evaluate the activation of the scapulothoracic muscles while performing tennis serve and to determine the changes in the mechanical properties of the same muscles in young tennis athletes with scapular dyskinesis. METHODS Seventeen tennis athletes with scapular dyskinesis aged between 11 and 18 years (the scapular dyskinesis group) and age- and gender-matched 17 asymptomatic tennis athletes (the control group) were included in the study. Activation of scapulothoracic muscles (descending-transverse-ascending trapezius and serratus anterior) in the 3 phases (preparation, acceleration, and follow-through) of the serve was evaluated using surface electromyography, and the mechanical properties of the same muscles were measured at rest by myotonometry. RESULTS Ascending trapezius activation in the follow-through phase was lower in the scapular dyskinesis group compared with the control group (mean difference 95% confidence interval: -22.8 [-41.2 to -4.5]) (P = .017). The tone and stiffness of the transverse trapezius (P = .043 and P = .017, respectively) were higher, whereas the same parameters of the ascending trapezius were lower (P = .008 and P = .010, respectively) in the scapular dyskinesis group compared with the control group. CONCLUSIONS Activation of the ascending trapezius and the tone and stiffness of the transverse-ascending trapezius were altered in tennis athletes with scapular dyskinesis. Implementations to improve these changes can be included in the rehabilitation or training programs of young tennis athletes with scapular dyskinesis.
Collapse
Affiliation(s)
- Volkan Deniz
- Department of Physiotherapy and Rehabilitation, Tarsus University Faculty of Health Sciences, Mersin, Turkey.
| | - Aylin Sariyildiz
- Department of Physical Medicine and Rehabilitation, Cukurova University Faculty of Medicine, Adana, Turkey
| | - Bilgihan Buyuktas
- Department of Physical Education and Sports Teacher, Cukurova University Faculty of Sports Sciences, Adana, Turkey
| | - Sibel Basaran
- Department of Physical Medicine and Rehabilitation, Cukurova University Faculty of Medicine, Adana, Turkey
| |
Collapse
|
3
|
Lambrich J, Muehlbauer T. Biomechanical analyses of different serve and groundstroke techniques in tennis: A systematic scoping review. PLoS One 2023; 18:e0290320. [PMID: 37590226 PMCID: PMC10434869 DOI: 10.1371/journal.pone.0290320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Accepted: 08/07/2023] [Indexed: 08/19/2023] Open
Abstract
This systematic scoping review aims to summarize findings regarding kinetic, kinematic, and electromyographic analyses of different characteristics (i.e., type/direction and stance style) of the tennis serve and groundstroke. A systematic search of the literature was performed on the databases PubMed, Web of Science, and SportDiscus from their inception date till May 2023. A descriptive analysis of results was conducted. The literature search identified a total of N = 899 records, 23 of which met the inclusion criteria and were analysed in this review. A total of 229 participants aged 18 to 62 years participated in the studies. The studies revealed varying results, ranging from significantly lower/higher values to no significant differences between serve/groundstroke characteristics. These inconsistent results may most likely be attributed to discrepancies in the methodological approach such as players' age (18-62 years), sex (i.e., men only or both sexes), and performance level (i.e., recreational, intermediate, or advanced) as well as the applied measurement devices (i.e., force plate or pressure-detecting insoles; motion capture system, high-speed video recordings, or IMU sensors) and used outcomes (i.e., measured or estimated force etc.). Future research is needed to provide a comprehensive biomechanical analysis of different serve/groundstroke characteristics. Specifically, it is recommended to compare different tennis serve and groundstroke types/directions and stance styles in female and male age-matched players with diverging performance levels (i.e., recreational, intermediate, advanced) using combined (i.e., kinetic, kinematic, and electromyographic) biomechanical analysis.
Collapse
Affiliation(s)
- Johanna Lambrich
- Division of Movement and Training Sciences/Biomechanics of Sport, University of Duisburg-Essen, Essen, Germany
| | - Thomas Muehlbauer
- Division of Movement and Training Sciences/Biomechanics of Sport, University of Duisburg-Essen, Essen, Germany
| |
Collapse
|
4
|
Rice RP, Roach K, Kirk-Sanchez N, Waltz B, Ellenbecker TS, Jayanthi N, Raya M. Age and Gender Differences in Injuries and Risk Factors in Elite Junior and Professional Tennis Players. Sports Health 2022; 14:466-477. [PMID: 35037501 PMCID: PMC9214903 DOI: 10.1177/19417381211062834] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND Elite tennis athletes experience injuries throughout the entire body. Impairments in trunk stability, lower limb flexibility, and hip range of motion (ROM) are modifiable risk factors that can impact injuries and performance. Information on nonmodifiable risk factors such as age and gender is limited. The purpose of this investigation was to provide information on risk factors to direct clinical decision-making and injury prevention and rehab programming in this population. HYPOTHESIS Prevalence and location of injuries will differ by age group and gender. Trunk stability, lower limb flexibility, and hip ROM will differ by age group and gender. STUDY DESIGN Cross-sectional study. LEVEL OF EVIDENCE Level 3. METHODS A de-identified database (n = 237; females = 126) from the United States Tennis Association High Performance Profile (HPP) 2014-2015 was used for the analysis. Subjects were elite junior and professional tennis players (mean age 14.6 [range, 9-27] years). The HPP is a tennis-specific assessment and questionnaire that includes retrospective information on injury history. Subjects were categorized by injury, gender, and age. Injury locations were classified by region. Trunk stability measures included drop vertical jump (DVJ), single-leg squat, and prone and side planks. Lower limb measures included hamstring, quadriceps and hip flexor flexibility, and hip rotation ROM. RESULTS A total of 46% of athletes reported an injury. Significant differences were found for injury prevalence and location by age group. Adolescent athletes (age 13-17 years) had more trunk injuries, while adult athletes (age ≥18 years) had more lower limb injuries. Adolescent athletes performed worse on DVJ, dominant side plank, and hamstring flexibility compared with young (age ≤12 years) and adult athletes. Significant gender differences in hip ROM included internal rotation on both the dominant and nondominant sides. CONCLUSION Impairments in trunk stability, lower limb flexibility, and hip rotation ROM may affect both health and performance outcomes in this population. Elite tennis athletes may benefit from additional off court programming to address trunk and lower limb impairments. CLINICAL RELEVANCE Adolescent elite tennis athletes may be at higher risk of trunk injuries. Age, gender, injury history, and impairments should be considered with all assessments and programming.
Collapse
Affiliation(s)
- Robyn Porter Rice
- Department of Physical Therapy, Miller School of Medicine, University of Miami, Miami, Florida,Robyn Porter Rice, PT, PhD, Department of Physical Therapy, Miller School of Medicine, University of Miami, 5915 Ponce de Leon Boulevard, Coral Gables FL 33146 () (Twitter: @RiceRobynp)
| | - Kathryn Roach
- Department of Physical Therapy, Miller School of Medicine, University of Miami, Miami, Florida
| | - Neva Kirk-Sanchez
- Department of Physical Therapy, Miller School of Medicine, University of Miami, Miami, Florida
| | - Bret Waltz
- DocWaltz LLC, Scottsdale, Arizona,USTA Player Development, Orlando, Florida
| | - Todd S. Ellenbecker
- Vice President Medical Services, ATP Tour, Ponte Vedra Beach, Florida,Rehab Plus Sports Therapy Scottsdale, Scottsdale, Arizona
| | - Neeru Jayanthi
- Emory Sports Medicine Center, Department of Orthopedic Surgery and Family Medicine, Emory University School of Medicine, Atlanta, Georgia
| | - Michele Raya
- Department of Physical Therapy, Miller School of Medicine, University of Miami, Miami, Florida
| |
Collapse
|
5
|
Chen MZ, Wang X, Chen Q, Ma Y, Malagoli Lanzoni I, Lam WK. An analysis of whole-body kinematics, muscle strength and activity during cross-step topspin among table tennis players. INT J PERF ANAL SPOR 2022. [DOI: 10.1080/24748668.2022.2025712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Ming-Zhu Chen
- Laboratory Management Center, Shenyang Sport University, Shenyang, China
| | - Xin Wang
- Department of Kinesiology, Shenyang Sport University, Shenyang, China
| | - Qi Chen
- Physical Education Department, The University of International Business and Economics, Beijing, China
| | - Yue Ma
- Key Laboratory of Impression Evidence Examination and Identification Technology, National Police University of China, Shenyang, China
| | - Ivan Malagoli Lanzoni
- Department of Biomedical and Neuromotor Sciences, Bologna University, Bologna, Italy
| | - Wing-Kai Lam
- Department of Kinesiology, Shenyang Sport University, Shenyang, China
| |
Collapse
|
6
|
Shafizadeh M, Bonner S, Barnes A, Fraser J. Effects of task and environmental constraints on axial kinematic synergies during the tennis service in expert players. Eur J Sport Sci 2019; 20:1178-1186. [PMID: 31868108 DOI: 10.1080/17461391.2019.1701093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The aims of this study were to examine the effects of task and environmental constraints on axial synergies and to find an association between synergies and arm acceleration as a performance variable. Participants of this study were 10 expert tennis players (age: 34.4 ± 7.46) who voluntarily took part and executed 60 serves under two different conditions: no-opponent and opponent. An inertial motion unit (IMU) capture system was used to calculate the 3D angular joint motions in the neck, back and lumbar segments. The results of the principal component analysis showed that the redundancy in the axial segments is decomposed into 2 main synergies that are responsible for the loading (backward swing) and firing phase (forward swing). The total variance and loading synergy variance were significantly lower in the topspin service than other service types. The emerged firing synergy was strongly associated with the arm acceleration regardless of service type. In conclusion, the effective strategy to utilise the axial motions in the trunk is through creating functional synergies that have a flexible role based on the type of service and conditions. The topspin service showed less coordination variability relative to other types of service and serving in the opponent condition required participants to change the nature of synergy among the axial segments. These findings support the design of practice that emphasises the importance of more realistic contexts with special attention given to the order of different service types.
Collapse
Affiliation(s)
- Mohsen Shafizadeh
- Academy of Sport and Physical Activity, Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK
| | - Stuart Bonner
- Academy of Sport and Physical Activity, Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK
| | - Andrew Barnes
- Academy of Sport and Physical Activity, Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK
| | - Jonathan Fraser
- Academy of Sport and Physical Activity, Faculty of Health and Wellbeing, Sheffield Hallam University, Sheffield, UK
| |
Collapse
|
7
|
Ali MS. Impact of core stability education on postural control in children with spastic cerebral palsy. BULLETIN OF FACULTY OF PHYSICAL THERAPY 2019. [DOI: 10.4103/bfpt.bfpt_25_18] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
|
8
|
Eriksrud O, Ghelem A, Cabri J. Isokinetic strength training of kinetic chain exercises of a professional tennis player with a minor partial internal abdominal oblique muscle tear - A case report. Phys Ther Sport 2019; 38:23-29. [PMID: 31039484 DOI: 10.1016/j.ptsp.2019.04.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 04/13/2019] [Accepted: 04/19/2019] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To present a case of a right-handed professional tennis player with a left internal abdominal oblique muscle tear sustained while serving. We document the progress of a rehabilitation program consisting of primarily kinetic chain isokinetic strength training where symmetrical measurements (<10% side difference) of force and dynamic postural control were used as criteria for return to sport. METHODS Isokinetic exercises (bilateral rotational pull, unilateral vertical press and unilateral anterior push) to target trunk specific demands of the serve (flexion, rotation and lateral flexion) were done using robotic resistance. Dynamic postural control was assessed using the hand reach star excursion balance test (HSEBT). The rehabilitation program lasted 3.5 weeks (eight sessions). RESULTS At baseline isokinetic strength tests that imposed concentric muscle function demands of the injured muscle had lower force measurements (range: -32.1 to -71.9%). These force measurements improved (range: 166.1-296.5%) and were symmetrical (range: +1.6 to +7.3%) on return to sport. In addition, the HSEBT test with the greatest asymmetry (-20 cm) improved to symmetrical (+2 cm) on return to sport. CONCLUSION Symmetrical isokinetic force and dynamic postural control measurements were successful return to sport criteria as the player since has remained pain free (2 years).
Collapse
Affiliation(s)
- Ola Eriksrud
- Department of Physical Performance, Norwegian School of Sports of Sciences, Oslo, Norway.
| | | | - Jan Cabri
- Department of Physical Performance, Norwegian School of Sports of Sciences, Oslo, Norway
| |
Collapse
|
9
|
Lower Limb Maneuver Investigation of Chasse Steps Among Male Elite Table Tennis Players. ACTA ACUST UNITED AC 2019; 55:medicina55040097. [PMID: 30965645 PMCID: PMC6524024 DOI: 10.3390/medicina55040097] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Revised: 03/06/2019] [Accepted: 04/04/2019] [Indexed: 11/17/2022]
Abstract
Background and objectives: The popularity of table tennis has increased globally. As a result, the biomechanical movement patterns in the lower limb during table tennis have attracted extensive attention from coaches, scientists and athletes. The purpose of this study was to compare the differences between the long and short chasse steps in table tennis and evaluate risk factors related to injuries in the lower limb. Materials and Methods: Twelve male elite athletes performed forehand topspin strokes with long and short chasse steps in this study, respectively. The kinematics data of the lower-limb joints were measured by a Vicon motion analysis system. The electromyograms (EMG) of six lower-limb muscles were recorded using a myoelectricity system. Results: The key findings were that the angle change rate of the ankle in the long chasse step was faster with a larger range of motion (ROM) in the coronal and transverse planes. The hip was also faster in the sagittal and transverse planes but slower in the coronal plane compared with the short chasse step. In addition, the vastus medialis (VM) was the first activated muscle in the chasse step. Conclusions: The hip and ankle joints in the long chasse step and the knee joint in the short chasse step have higher susceptibility to injury. Moreover, tibialis anterior (TA), vastus medialis (VM) and gastrocnemius (GM) should be sufficiently stretched and warmed prior to playing table tennis. The results of this study may provide helpful guidance for teaching strategies and providing an understanding of potential sport injury mechanisms.
Collapse
|
10
|
Wang M, Fu L, Gu Y, Mei Q, Fu F, Fernandez J. Comparative Study of Kinematics and Muscle Activity Between Elite and Amateur Table Tennis Players During Topspin Loop Against Backspin Movements. J Hum Kinet 2018; 64:25-33. [PMID: 30429896 PMCID: PMC6231340 DOI: 10.1515/hukin-2017-0182] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
This study investigated differences of lower limb kinematics and muscle activity during table tennis topspin loop against backspin movements between elite players (EPs) and amateur players (APs). Ten EPs and ten APs performed crosscourt backhand loop movements against the backspin ball with maximal power. Vicon motion analysis and a MEGA ME6000 system was used to capture kinematics and surface EMG data. The motion was divided into two phases, including the backswing and swing. The joints' flexion and extension angle tendency between EPs and APs differed significantly. The coefficient of multiple correlation (CMC) values for EPs were all beyond 0.9, indicating high similarity of joint angles change. APs presented moderate similarity with CMC values from 0.5 to 0.75. Compared to APs, EPs presented larger ankle eversion, knee and hip flexion at the beginning moment of the backswing. In the sEMG test, EPs presented smaller standardized AEMG (average electromyography) of the lower limb muscles in the rectus femoris and tibia anterior on both sides. Additionally, the maximum activation of each muscle for EPs was smaller and MPF (mean power frequency) of the lower limb was greater during the whole movement. The present study revealed that EPs could complete this technical motion more economically than APs, meanwhile, EPs were more efficient in muscle usage and showed better balance ability.
Collapse
Affiliation(s)
- Meizi Wang
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Lin Fu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Yaodong Gu
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Yaodong Gu Faculty of Sports Science, Ningbo University, No. 818, Fenghua Road, Jiangbei District, Ningbo, Zhejiang Province, China
| | - Qichang Mei
- Faculty of Sports Science, Ningbo University, Ningbo, China
- Department of Engineering Science, University of Auckland, Auckland, New Zealand
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Fengqin Fu
- Faculty of Sports Science, Ningbo University, Ningbo, China
| | - Justin Fernandez
- Department of Engineering Science, University of Auckland, Auckland, New Zealand
- Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| |
Collapse
|
11
|
Fenter B, Marzilli TS, Wang YT, Dong XN. Effects of a Three-Set Tennis Match on Knee Kinematics and Leg Muscle Activation during the Tennis Serve. Percept Mot Skills 2016; 124:214-232. [PMID: 27733665 DOI: 10.1177/0031512516672773] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The purpose of this study was to determine the effect of a three-set tennis match on knee kinematics and leg muscle activation during the tennis serve in a real-time environment. Motion capture data and wireless electromyography of hamstrings and quadriceps muscles were collected from the back leg during the serve. A reduction of maximum knee flexion angle and a decrease of electromyography amplitudes in leg muscles were observed during the match. However, the knee angular velocity and the electromyography frequency of leg muscles remain unchanged throughout the match. The intermuscular compensation strategy to counteract fatigue might explain that the knee angular velocity was maintained despite reductions in knee flexion angle and electromyography activity of leg muscles.
Collapse
Affiliation(s)
- Brad Fenter
- 1 Department of Health and Kinesiology, The University of Texas at Tyler, TX, USA
| | - Thomas S Marzilli
- 1 Department of Health and Kinesiology, The University of Texas at Tyler, TX, USA
| | - Yong T Wang
- 1 Department of Health and Kinesiology, The University of Texas at Tyler, TX, USA
| | - Xuanliang N Dong
- 1 Department of Health and Kinesiology, The University of Texas at Tyler, TX, USA
| |
Collapse
|
12
|
Wasser JG, Chen C, Vincent HK. Kinematics of Shooting in High School and Collegiate Lacrosse Players With and Without Low Back Pain. Orthop J Sports Med 2016; 4:2325967116657535. [PMID: 27504465 PMCID: PMC4962339 DOI: 10.1177/2325967116657535] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Background: Low back pain (LBP) and motion alterations can occur in athletes who engage in high-speed throwing motions. The relationship between LBP and shooting motion in lacrosse players is not yet known. Purpose: To quantify the effects of LBP on key kinematic parameters of the lacrosse shot and determine the contribution of the severity of LBP on specific kinematic parameters of the shooting motion. Study Design: Controlled laboratory study. Methods: High school and collegiate players (N = 24) were stratified into 2 groups based on back pain symptoms (LBP or no pain). Three-dimensional motion capture of overhead throws was used to collect data on knee, pelvis, trunk, and shoulder kinematics as well as crosse stick (the stick capped with a strung net) and ball speed. Results: Mean low back numeric pain rating scale (NRSpain) score was 2.9. Knee flexion at ball release was greater in the LBP than no pain group, indicating a more bent knee (P = .04). The LBP group demonstrated less angular velocity transfer from pelvis to trunk than the no pain group (P = .05). Total range of motion of the pelvis and shoulders during the shot and follow-through were less in the LBP group than the no pain group (83.6° ± 24.5° vs 75.9° ± 24.5°, P = .05). Age- and sex-adjusted regression analyses revealed that the low back NRSpain rating contributed 6.3% to 25.0% of the variance to the models of shoulder transverse rotation range of motion, trunk and shoulder rotation angular velocities, and knee flexion angle (P < .05). Conclusion: LBP severity significantly contributes to trunk and shoulder motion restriction during lacrosse shooting. Inclusion of lumbopelvic and core training and prehabilitation programs for high school and collegiate players may reduce pain in affected players as well as help them to attain appropriate motion parameters and avoid secondary musculoskeletal injuries. Clinical Relevance: This research identified a prehabilitation need in the understudied lacrosse population. Therapeutic strategies can be developed to strengthen the throwing motion, which could control mechanical loading patterns on the low back and minimize pain symptoms in players with chronic LBP.
Collapse
Affiliation(s)
- Joseph G Wasser
- Department of Orthopaedics and Rehabilitation, Division of Research, Interdisciplinary Center for Musculoskeletal Training and Research, University of Florida, Gainesville, Florida, USA
| | - Cong Chen
- Department of Orthopaedics and Rehabilitation, Division of Research, Interdisciplinary Center for Musculoskeletal Training and Research, University of Florida, Gainesville, Florida, USA
| | - Heather K Vincent
- Department of Orthopaedics and Rehabilitation, Division of Research, Interdisciplinary Center for Musculoskeletal Training and Research, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
13
|
Trunk muscle activation, fatigue and low back pain in tennis players. J Sci Med Sport 2016; 19:311-6. [DOI: 10.1016/j.jsams.2015.04.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2014] [Revised: 03/23/2015] [Accepted: 04/08/2015] [Indexed: 11/18/2022]
|
14
|
Abstract
Tennis places high loads on the joints of players, with supraphysiologic forces being generated at the shoulder and elbow hundreds of times per match. Acute injuries tend to affect the lower extremity; chronic injuries usually involve the upper extremity. Commonly encountered upper extremity conditions include rotator cuff injury, internal impingement, superior labral tears, and epicondylitis of the elbow. Serving is the most strenuous stroke in tennis, with the highest peak muscle activity in the shoulder and forearm occurring during this stroke. The kinetic chain links upper extremity, lower extremity, and core muscle segments by transmitting coordinated activation and motion; in this regard, any pathologic process that disturbs the groin, hip, and abdominal musculature can further result in an increased risk of injury to the shoulder and upper extremity. Evolution in equipment and in play surfaces has also affected the type and frequency of injuries. Prevention programs that address the muscular imbalances throughout the kinetic chain may help reduce the incidence of both acute and chronic injuries experienced by tennis athletes.
Collapse
|
15
|
Rajeswaran G, Turner M, Gissane C, Healy JC. MRI findings in the lumbar spines of asymptomatic elite junior tennis players. Skeletal Radiol 2014; 43:925-32. [PMID: 24691895 DOI: 10.1007/s00256-014-1862-1] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 03/02/2014] [Indexed: 02/02/2023]
Abstract
OBJECTIVE To evaluate the MRI findings in the lumbar spines of asymptomatic elite junior tennis players. MATERIALS AND METHODS The lumbar spine MRI studies of 98 asymptomatic junior elite tennis players (51 male, 47 female) with a mean age of 18 years (age range 11.2-26.3 years; standard deviation 3.1) was reviewed by two consultant musculoskeletal radiologists using consensus opinion. Images were assessed using accepted classification systems. RESULTS Four players (4%) had no abnormality. Facet joint arthropathy occurred in 89.7% of the players, being mild in 84.5% of cases. There were 41 synovial cysts in 22.4% of the cohort all occurring in the presence of facet arthropathy. Disc degeneration was noted in 62.2 % of players, being mild in 76.2% of those affected. Disc herniation was noted in 30.6% of players, with 86.1% of these being broad based and 13.9% being focal. There was nerve root compression in 2%. There were 41 pars interarticularis abnormalities in 29.6% of patients, 63.4% of these being grades 1-3. There was grade 1 spondylolisthesis in 5.1% of players. The prevalence of facet joint arthropathy, disc degeneration, disc herniation and pars interarticularis fracture was lower in female players than in male and lower in the under 16-year-olds compared with the over 20-year-olds. CONCLUSION There is a significant amount of underlying pathology that would normally go undetected in this group of asymptomatic elite athletes. Whilst these findings cannot be detected clinically, their relevance is in facilitating appropriate prehabilitation to prevent loss of playing time and potentially career-ending injuries.
Collapse
Affiliation(s)
- G Rajeswaran
- Department of Radiology, Chelsea and Westminster Hospital NHS Foundation Trust, 369 Fulham Road, London, SW10 9NH, England, UK,
| | | | | | | |
Collapse
|
16
|
Campbell A, Straker L, O'Sullivan P, Elliott B, Reid M. Lumbar loading in the elite adolescent tennis serve: link to low back pain. Med Sci Sports Exerc 2014; 45:1562-8. [PMID: 23470302 DOI: 10.1249/mss.0b013e31828bea5e] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
PURPOSE This study aimed to quantify and compare lumbar region kinetics in kick and flat serves performed by elite, adolescent male players with and without a history of low back pain (LBP). Lumbar region kinematics, as well as racquet velocity and the position of the ball at impact, was described to facilitate kinetic data interpretation. METHODS Twenty Tennis Australia adolescent male players participated; 7 had a history of disabling LBP and confirmed L4/L5 injury and 13 were age-, height-, mass-, and performance-matched controls. The VICON motion analysis system was used to record racquet, upper and lower limb, trunk, and lumbar movement during three "flat" and three "kick" serves. A customized mathematical model calculated lumbar region kinetics/kinematics, racquet velocity, and ball position at impact, and these are reported as if all players were right-handed. A series of 2 × 2 mixed-model ANOVA were used to compare between pain/no pain and kick/flat serves. RESULTS There was no significant difference in racquet velocity or ball position at impact between pain groups or serve types. The players with LBP reported significantly greater (mean difference = 1.5 N · kg(-1)) peak left lateral force than the control group. The flat serve was associated with significantly greater flexion moments (mean difference = 2.7 N · kg(-1)) than the kick serve. CONCLUSIONS The lumbar region undergoes substantial loading during both the kick and the flat tennis serves, including lateral flexion forces approximately eight times those experienced during running. Given that these left lateral flexion forces are significantly greater in players with a history of disabling LBP and occur simultaneous with peak vertical force and extension and right lateral rotations, this may be an important LBP mechanism in this population.
Collapse
Affiliation(s)
- Amity Campbell
- School of Physiotherapy and Curtin Health Innovation Research Institute, Curtin University, Perth, Australia.
| | | | | | | | | |
Collapse
|
17
|
Tarnanen SP, Siekkinen KM, Häkkinen AH, Mälkiä EA, Kautiainen HJ, Ylinen JJ. Core Muscle Activation During Dynamic Upper Limb Exercises in Women. J Strength Cond Res 2012; 26:3217-24. [DOI: 10.1519/jsc.0b013e318248ad54] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
|
18
|
Kovacs M, Ellenbecker T. An 8-stage model for evaluating the tennis serve: implications for performance enhancement and injury prevention. Sports Health 2012; 3:504-13. [PMID: 23016050 PMCID: PMC3445225 DOI: 10.1177/1941738111414175] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023] Open
Abstract
BACKGROUND The tennis serve is a complex stroke characterized by a series of segmental rotations involving the entire kinetic chain. Many overhead athletes use a basic 6-stage throwing model; however, the tennis serve does provide some differences. EVIDENCE ACQUISITION To support the present 8-stage descriptive model, data were gathered from PubMed and SPORTDiscus databases using keywords tennis and serve for publications between 1980 and 2010. RESULTS An 8-stage model of analysis for the tennis serve that includes 3 distinct phases-preparation, acceleration, and follow-through-provides a more tennis-specific analysis than that previously presented in the clinical tennis literature. When a serve is evaluated, the total body perspective is just as important as the individual segments alone. CONCLUSION The 8-stage model provides a more in-depth analysis that should be utilized in all tennis players to help better understand areas of weakness, potential areas of injury, as well as components that can be improved for greater performance.
Collapse
Affiliation(s)
- Mark Kovacs
- Coaching Education and Sport Science, United States Tennis Association Player Development Incorporated, Boca Raton, Florida
| | | |
Collapse
|
19
|
Abrams GD, Harris AHS, Andriacchi TP, Safran MR. Biomechanical analysis of three tennis serve types using a markerless system. Br J Sports Med 2012; 48:339-42. [PMID: 22936411 DOI: 10.1136/bjsports-2012-091371] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
PURPOSE The tennis serve is commonly associated with musculoskeletal injury. Advanced players are able to hit multiple serve types with different types of spin. No investigation has characterised the kinematics of all three serve types for the upper extremity and back. METHODS Seven NCAA Division I male tennis players performed three successful flat, kick and slice serves. Serves were recorded using an eight camera markerless motion capture system. Laser scanning was utilised to accurately collect body dimensions and data were computed using inverse kinematic methods. RESULTS There was no significant difference in maximum back extension angle for the flat, kick or slice serves. The kick serve had a higher force magnitude at the back than the flat and slice as well as larger posteriorly directed shoulder forces. The flat serve had significantly greater maximum shoulder internal rotation velocity versus the slice serve. Force and torque magnitudes at the elbow and wrist were not significantly different between the serves. CONCLUSIONS The kick serve places higher physical demands on the back and shoulder while the slice serve demonstrated lower overall kinetic forces. This information may have injury prevention and rehabilitation implications.
Collapse
Affiliation(s)
- Geoffrey D Abrams
- Department of Orthopedic Surgery, Stanford University, Stanford, California, USA
| | | | | | | |
Collapse
|
20
|
Abrams GD, Sheets AL, Andriacchi TP, Safran MR. Review of tennis serve motion analysis and the biomechanics of three serve types with implications for injury. Sports Biomech 2012; 10:378-90. [PMID: 22303788 DOI: 10.1080/14763141.2011.629302] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
Abstract
The tennis serve has the potential for musculoskeletal injury as it is an overhead motion and is performed repetitively during play. Early studies evaluating the biomechanics and injury potential of the tennis serve utilized skin-based marker technologies; however, markerless motion measurement systems have recently become available and have obviated some of the problems associated with the marker-based technology. The late cocking and early acceleration phases of the kinetic chain of the service motion produce the highest internal forces and pose the greatest risk of injury during the service motion. Previous biomechanical data on the tennis serve have primarily focused on the flat serve, with some data on the kick serve, and very little published data elucidating the biomechanics of the slice serve. This review discusses the injury potential of the tennis serve with respect to the four phases of the service motion, the history, and early findings of service motion evaluation, as well as biomechanical data detailing the differences between the three types of serves and how this may relate to injury prevention, rehabilitation, and return to play.
Collapse
Affiliation(s)
- Geoffrey D Abrams
- Department of Orthopedic Surgery, Stanford University, Stanford, CA 94063, USA
| | | | | | | |
Collapse
|
21
|
Conte SA, Thompson MM, Marks MA, Dines JS. Abdominal muscle strains in professional baseball: 1991-2010. Am J Sports Med 2012; 40:650-6. [PMID: 22268233 DOI: 10.1177/0363546511433030] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
BACKGROUND The abdominal core muscles (internal and external oblique, rectus and transversus abdominis) play an important role in the baseball activities of pitching and hitting. Proper abdominal muscle activation during throwing and swinging is crucial for generating optimal ball velocity and bat speed. Abdominal muscle strains can result in substantial loss of playing time, and their incidence has never been reported in baseball. HYPOTHESIS The incidence of abdominal muscle strains in Major League Baseball has been rising over the past 20 years. Injuries contralateral to the dominant arm or batting side are more common and require more time to recover. STUDY DESIGN Descriptive epidemiology study. METHODS Abdominal muscle strains in baseball players were determined by retrospective review of the Major League Baseball disabled list from 1991 to 2010. Player age, position, dominant hand, batting side, and recovery time were recorded. RESULTS There were 393 abdominal muscle strains in Major League Baseball from 1991 to 2010, constituting 5% of all baseball injuries. At least 92% of these injuries were internal/external oblique or intercostal muscle strains, and 44% of injuries were sustained by pitchers. The reinjury rate was 12.1%. An upward trend was seen from 1991 to 2010, especially in early-season injuries, and the overall injury rate was 22% higher in the 2000s than in the 1990s. Pitchers averaged 35.4 days on the disabled list compared with 26.7 days for position players (P < .01); 78.1% of pitcher injuries were contralateral to their dominant arm, and 70.3% of position player injuries were contralateral to their dominant batting side (excluding switch hitters). Position players missed more time for contralateral than for ipsilateral injuries (28.9 vs 21.2 days, P = .03), whereas pitchers missed more time for ipsilateral injuries (44.5 vs 32.8 days, P = .04). CONCLUSION The incidence of abdominal muscle strains in baseball has been increasing over the past 20 years, especially early in the season, and there is a relatively high reinjury rate. This upward trend is in spite of new and more advanced diagnostic procedures, preventive core strengthening exercise programs, and rehabilitation techniques. Injuries contralateral to the dominant arm or batting side are more common.
Collapse
Affiliation(s)
- Stan A Conte
- Hospital for Special Surgery, 535 East 70th Street, New York, NY 10021, USA
| | | | | | | |
Collapse
|
22
|
Contreras B, Schoenfeld B. To Crunch or Not to Crunch: An Evidence-Based Examination of Spinal Flexion Exercises, Their Potential Risks, and Their Applicability to Program Design. Strength Cond J 2011. [DOI: 10.1519/ssc.0b013e3182259d05] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
|
23
|
Chow JW, Park SA, Tillman MD. Lower trunk kinematics and muscle activity during different types of tennis serves. BMC Sports Sci Med Rehabil 2009; 1:24. [PMID: 19825184 PMCID: PMC2770553 DOI: 10.1186/1758-2555-1-24] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2009] [Accepted: 10/13/2009] [Indexed: 11/10/2022]
Abstract
BACKGROUND To better understand the underlying mechanisms involved in trunk motion during a tennis serve, this study aimed to examine the (1) relative motion of the middle and lower trunk and (2) lower trunk muscle activity during three different types of tennis serves - flat, topspin, and slice. METHODS Tennis serves performed by 11 advanced (AV) and 8 advanced intermediate (AI) male tennis players were videorecorded with markers placed on the back of the subject used to estimate the anatomical joint (AJ) angles between the middle and lower trunk for four trunk motions (extension, left lateral flexion, and left and right twisting). Surface electromyographic (EMG) techniques were used to monitor the left and right rectus abdominis (LRA and RRA), external oblique (LEO and REO), internal oblique (LIO and RIO), and erector spinae (LES and RES). The maximal AJ angles for different trunk motions during a serve and the average EMG levels for different muscles during different phases (ascending and descending windup, acceleration, and follow-through) of a tennis serve were evaluated. RESULTS The repeated measures Skill x Serve Type x Trunk Motion ANOVA for maximal AJ angle indicated no significant main effects for serve type or skill level. However, the AV group had significantly smaller extension (p = 0.018) and greater left lateral flexion (p = 0.038) angles than the AI group. The repeated measures Skill x Serve Type x Phase MANOVA revealed significant phase main effects in all muscles (p < 0.001) and the average EMG of the AV group for LRA was significantly higher than that of the AI group (p = 0.008). All muscles showed their highest EMG values during the acceleration phase. LRA and LEO muscles also exhibited high activations during the descending windup phase, and RES muscle was very active during the follow-through phase. CONCLUSION Subjects in the AI group may be more susceptible to back injury than the AV group because of the significantly greater trunk hyperextension, and relatively large lumbar spinal loads are expected during the acceleration phase because of the hyperextension posture and profound front-back and bilateral co-activations in lower trunk muscles.
Collapse
Affiliation(s)
- John W Chow
- Center for Neuroscience and Neurological Recovery, Methodist Rehabilitation Center, Jackson, Mississippi, USA
| | - Soo-An Park
- Department of Orthopedic Surgery, Asan Medical Center, University of Ulsan, Seoul, South Korea
| | - Mark D Tillman
- Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, Florida, USA
| |
Collapse
|
24
|
Bonnefoy A, Slawinski J, Leveque J, Riquet A, Miller C. Relationship between the vertical racquet head height and the lower limb motions of elite players' flat serve. Comput Methods Biomech Biomed Engin 2009. [DOI: 10.1080/10255840903065522] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
|
25
|
Evaluating the effect of electrode location on surface EMG amplitude of the m. erector spinae p. longissimus dorsi. J Electromyogr Kinesiol 2008; 19:e257-66. [PMID: 18556215 DOI: 10.1016/j.jelekin.2008.03.013] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2007] [Revised: 03/13/2008] [Accepted: 03/13/2008] [Indexed: 11/24/2022] Open
Abstract
Variations in surface electromyography (SEMG) amplitude have been shown to be dependent on the dislocation of recording electrodes. Yet no literature is available about the effect of electrode dislocation on SEMG amplitude of the lower back muscles. In this project, the aim was to determine this effect by investigating changes in the SEMG root mean square (RMS), induced by a well-defined dislocation of the recording electrodes. Bipolar SEMG of the longissimus dorsi (LD) muscles was measured in 16 healthy subjects undertaking five functional tasks (standing, forward flexion, re-extension, unsupported sitting and arm/leg lifting), and for eight of those subjects the experiment was repeated within two weeks. Intra-class correlation coefficients (ICCs) were used to show the reliability of the RMS in relation to electrode dislocation, the repeatability of the tasks, and the test-retest reliability. Results showed that: (1) lateral dislocation causes a significant decrease (18%, p<0.001) in RMS; (2) longitudinal dislocation does not change the RMS; and (3) the variability caused by electrode dislocation is comparable to the variability caused by repetitions of tasks or by electrode repositioning. Our conclusion is that positioning in the mediolateral direction should be exact to minimize changes in SEMG amplitude due to dislocation. However, precise longitudinal electrode positioning seems to be less critical in experimental setups which measure the SEMG of the lower back muscles.
Collapse
|
26
|
Maquirriain J, Ghisi JP, Kokalj AM. Rectus abdominis muscle strains in tennis players. Br J Sports Med 2008; 41:842-8. [PMID: 17957025 DOI: 10.1136/bjsm.2007.036129] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Rectus abdominis muscle strains are common and debilitating injuries among competitive tennis players. Eccentric overload, followed by forced contraction of the non-dominant rectus abdominis during the cocking phase of the service motion is the accepted injury mechanism. A tennis-specific rehabilitation program emphasising eccentrics and plyometric strengthening of the abdominal wall muscles, contributes to the complete functional recovery in tennis players, and could help reduce recurrences.
Collapse
Affiliation(s)
- Javier Maquirriain
- Centro Nacional de Alto Rendimiento Deportivo, Pilar, Buenos Aires, Argentina.
| | | | | |
Collapse
|
27
|
Sánchez-Muñoz C, Sanz D, Zabala M. Anthropometric characteristics, body composition and somatotype of elite junior tennis players. Br J Sports Med 2007; 41:793-9. [PMID: 17957016 PMCID: PMC2465306 DOI: 10.1136/bjsm.2007.037119] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/07/2007] [Indexed: 11/04/2022]
Abstract
OBJECTIVES The aims of this study were to describe the anthropometric characteristics, body composition and somatotype of elite male and female junior tennis players, to compare the anthropometric data, body composition and somatotype of the first 12 elite junior tennis players on the ranking with the lower ranked players, and to establish an anthropometric profile chart for elite junior tennis players. METHODS A total of 123 (57 males and 66 females) elite junior tennis players participated in this study. The athletes were divided into two groups, the first 12 and the lower ranked players, according to gender. A total of 17 anthropometric variables were recorded of each subject. RESULTS There were no significant differences in height and weight between the first 12 and the lower ranked boys, while the first 12 girls were significantly taller than the lower ranked girls (p = 0.009). Significant differences were found for humeral and femoral breadths between the first 12 and the lower ranked girls (p = 0.000; p = 0.004, respectively). The mean (SD) somatotype of elite male junior tennis players could be defined as ectomesomorphic (2.4 (0.7), 5.2 (0.8), 2.9 (0.7)) and the mean (SD) somatotype of elite female junior tennis players evaluated could be defined as endomesomorphic (3.8 (0.9), 4.6 (1.0), 2.4 (1.0)). No significant differences were found in somatotype components between the first 12 and the lower ranked players of both genders. CONCLUSIONS When comparing the first 12 and the lower ranked elite junior tennis players of both genders, no significant differences were observed in any measured item for the boys. By contrast, significant differences were observed in height and humeral and femoral breadths between the first 12 and the lower ranked girls, whereby the first 12 were taller and had wider humeral and femoral breadths than the lower ranked players. These differences could influence the playing style of junior female players.
Collapse
|
28
|
|
29
|
Connell D, Ali K, Javid M, Bell P, Batt M, Kemp S. Sonography and MRI of Rectus Abdominis Muscle Strain in Elite Tennis Players. AJR Am J Roentgenol 2006; 187:1457-61. [PMID: 17114537 DOI: 10.2214/ajr.04.1929] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
OBJECTIVE The objective of this study was to describe the imaging findings at sonography and MRI of rectus abdominis muscle strain in tennis players. CONCLUSION Asymmetrical hypertrophy of the recti is seen in elite tennis players. The muscle belly hypertrophies on the side opposite the dominant arm and is subject to muscle tears of its deep fibers below the umbilicus. Imaging can be used to show these injuries.
Collapse
Affiliation(s)
- David Connell
- Department of Radiology, Royal National Orthopaedic Hospital, Brockley Hill, Stanmore, London HA7 4LP, United Kingdom.
| | | | | | | | | | | |
Collapse
|
30
|
Abstract
Success in tennis requires a mix of player talent, good coaching, appropriate equipment, and an understanding of those aspects of sport science pertinent to the game. This paper outlines the role that biomechanics plays in player development from sport science and sport medicine perspectives. Biomechanics is a key area in player development because all strokes have a fundamental mechanical structure and sports injuries primarily have a mechanical cause.
Collapse
Affiliation(s)
- B Elliott
- University of Western Australia, Perth, WA, Australia.
| |
Collapse
|