Medicine and Health Sciences Commons^™

Low Pre-Season Hamstring-To-Quadriceps Strength Ratio Identified In Players Who Further Sustained In-Season Hamstring Strain Injuries: A Retrospective Study From A Brazilian Serie A Team, Filipe Veeck, Cassio V. Ruas, Matheus Daros Pinto, Rafael Grazioli, Gustavo Pacheco Cardoso, Thiago Albuquerque, Lucas Schipper, Henrique Gonçalves Valente, Victor H. Santos, Márcio Dornelles, Paulo Rabaldo, Clarice S. Rocha, Bruno Manfredini Baroni, Eduardo Lusa Cadore, Ronei Silveira Pinto

Research outputs 2022 to 2026

A common pre-season injury prevention assessment conducted by professional football clubs is the hamstring-to-quadriceps (H:Q) strength ratio calculated by peak torque (PT). However, it is debatable whether players that present low pre-season H:Q ratios are more susceptible to further sustaining in-season hamstring strain injuries (HSI). Based upon retrospective data from a Brazilian Serie A football squad, a particular season came to our attention as ten out of seventeen (~59%) professional male football players sustained HSI. Therefore, we examined the pre-season H:Q ratios of these players. H:Q conventional (CR) and functional (FR) ratios, and the respective knee extensor/flexor PT from the …

Adaptive Goal Processes And Underlying Motives That Sustain Mental Wellbeing And New Year Exercise Resolutions, Joanne M. Dickson, Amelia Hart, Caitlin Fox-Harding, Christopher D. Huntley

Research outputs 2022 to 2026

Exercise resolutions are the most common goals people set each New Year. However, research has rarely examined adaptive goal processes and motives that may maintain wellbeing and resolution pursuit. We therefore investigated if (1) personal goal flexibility and tenacity maintain mental wellbeing and adherence to New Year exercise resolutions and if (2) underlying intrinsic and extrinsic motives maintain wellbeing and sustained exercise resolution adherence. A community sample (N = 297) completed an online longitudinal study. At baseline, participants listed their most important exercise-related New Year resolution. Participants then completed measures to assess goal flexibility and tenacity, resolution motives, and mental …

Exercise Medicine Considerations For Pregnancy-Associated Breast Cancer: Characteristics, Prognosis And Treatment, Brianna Fleay, Favil Singh, Christobel Saunders, Dennis R. Taaffe, Daniel A. Galvao, Robert Newton, Caitlin Fox-Harding

Research outputs 2022 to 2026

Breast cancer is the most prevalent cancer in women worldwide and is the most common cancer diagnosis made during pregnancy or in the postpartum period. When breast cancer is diagnosed either during pregnancy or in the first-year postpartum, it is referred to as pregnancy-associated breast cancer. The aim of this review is to assess existing literature regarding the recommendations and outcomes of participating in exercise for people with pregnancy-associated breast cancer. The occurrence of pregnancy-associated breast cancer is increasing as a growing number of women delay first pregnancies. Women undergoing treatment for pregnancy-associated breast cancer are dealing with both cancer …

No Effect Of Repeated Post-Resistance Exercise Cold Or Hot Water Immersion On In-Season Body Composition And Performance Responses In Academy Rugby Players: A Randomised Controlled Cross-Over Design, Barry G. Horgan, Shona L. Halson, Eric J. Drinkwater, Nicholas P. West, Nicolin Tee, Rebekah D. Alcock, Dale W. Chapman, G. Gregory Haff

Research outputs 2022 to 2026

Purpose:

Following resistance exercise, uncertainty exists as to whether the regular application of cold water immersion attenuates lean muscle mass increases in athletes. The effects of repeated post-resistance exercise cold versus hot water immersion on body composition and neuromuscular jump performance responses in athletes were investigated.

Methods:

Male, academy Super Rugby players (n = 18, 19.9 ± 1.5 y, 1.85 ± 0.06 m, 98.3 ± 10.7 kg) participated in a 12-week (4-week × 3-intervention, i.e., control [CON], cold [CWI] or hot [HWI] water immersion) resistance exercise programme, utilising a randomised cross-over pre–post-design. Body composition measures were collected using dual-energy X-ray …

Neuromuscular Fatigue And Muscle Damage Following A Simulated Singles Badminton Match, Zengyuan Lin, Anthony J. Blazevich, Chris R. Abbiss, Jodie Cochrane Wilkie, Kazunori Nosaka

Research outputs 2022 to 2026

Purpose:

To understand muscle damage in badminton, changes in neuromuscular function were investigated after simulated badminton singles matches performed by ten state-level male players.

Methods:

Each participant played eight matches and measurements were taken before, immediately after, and 1 and 24 h after each match. Maximal voluntary isometric contraction (MVC) torque of the knee extensors and flexors, voluntary activation (VA) during MVC and torques generated by doublet (T_Doublet), 20 (T₂₀) and 80 Hz (T₈₀) electrical stimulations of the knee extensors were measured from the dominant leg (the racket-hold arm side). Muscle soreness was assessed …

Sprint Cycling Rate Of Torque Development Associates With Strength Measurement In Trained Cyclists, Shannon Connolly, Peter Peeling, Martyn J. Binnie, Paul S. R. Goods, Christopher Latella, Janet L. Taylor, Anthony J. Blazevich, Wouter P. Timmerman, Chris R. Abbiss

Research outputs 2022 to 2026

Purpose:

A cyclist’s rate of force/torque development (RFD/RTD) and peak force/torque can be measured during single-joint or whole-body isometric tests, or during cycling. However, there is limited understanding of the relationship between these measures, and of the mechanisms that contribute to each measure. Therefore, we examined the: (i) relationship between quadriceps central and peripheral neuromuscular function with RFD/RTD in isometric knee extension, isometric mid-thigh pull (IMTP), and sprint cycling; and (ii) relationship among RFD/RTD and peak force/torque between protocols.

Methods:

Eighteen trained cyclists completed two familiarisation and two experimental sessions. Each session involved an isometric knee extension, IMTP, and sprint …

Connective Adaptive Resistance Exercise (Care) Machines For Accentuated Eccentric And Eccentric-Only Exercise: Introduction To An Emerging Concept, James L. Nuzzo, Matheus Daros Pinto, Kazunori Nosaka

Research outputs 2022 to 2026

Eccentric resistance exercise emphasizes active muscle lengthening against resistance. In the past 15 years, researchers and practitioners have expressed considerable interest in accentuated eccentric (i.e., eccentric overload) and eccentric-only resistance exercise as strategies for enhancing performance and preventing and rehabilitating injuries. However, delivery of eccentric resistance exercise has been challenging because of equipment limitations. Previously, we briefly introduced the concept of connected adaptive resistance exercise (CARE)—the integration of software and hardware to provide a resistance that adjusts in real time and in response to the individual’s volitional force within and between repetitions. The aim of the current paper is to …

Changes In Deadlift Six Repetition Maximum, Countermovement Jump Performance, Barbell Velocity, And Perceived Exertion Over The Duration Of A Microcycle, Stuart N. Guppy, Tsuyoshi Nagatani, Wayne C. K. Poon, Kristina L. Kendall, Jason P. Lake, G. Gregory Haff

Research outputs 2022 to 2026

The primary aim of this study was to investigate the stability of the six-repetition maximum (6RM) deadlift over the length of a five-day microcycle and whether the fatigue induced by maximal effort testing detrimentally impacted preparedness. Twelve participants performed four testing sessions, comprising a one-repetition maximum test and three 6RM tests separated by 48 hours. Countermovement jumps were performed before each testing session, and barbell velocity was measured during each warm-up set to assess changes in preparedness. The 6RM deadlift was not statistically different between any of the testing sessions (p  =  .056; η_p²  =  0.251). Similarly, …

Overview Of Muscle Fatigue Differences Between Maximal Eccentric And Concentric Resistance Exercise, James L. Nuzzo, Matheus D. Pinto, Kazunori Nosaka

Research outputs 2022 to 2026

Since the 1970s, researchers have studied a potential difference in muscle fatigue (acute strength loss) between maximal eccentric (ECCmax) and concentric (CONmax) resistance exercise. However, a clear answer to whether such a difference exists has not been established. Therefore, the aim of our paper was to overview methods and results of studies that compared acute changes in muscle strength after bouts of ECCmax and CONmax resistance exercise. We identified 30 relevant studies. Participants were typically healthy men aged 20–40 years. Exercise usually consisted of 40–100 isokinetic ECCmax and CONmax repetitions of the knee extensors or elbow flexors. Both ECCmax and …

Injury Profiles Of Police Recruits Undergoing Basic Physical Training: A Prospective Cohort Study, Nicole Merrick, Nicolas H. Hart, Andrea B. Mosler, Garth Allen, Myles C. Murphy

Research outputs 2022 to 2026

Purpose:

A lack of published epidemiological data among police recruits presents a major challenge when designing appropriate prevention programs to reduce injury burden. We aimed to report the injury epidemiology of Western Australian (WA) Police Force recruits and examine sex and age as injury risk factors

Methods:

Retrospective analyses were conducted of prospectively collected injury data from WA Police Force recruits between 2018–2021. Injury was defined as ‘time-loss’ and injury incidence rate per 1000 training days (Poisson exact 95% confidence intervals) was calculated. For each region and type of injury, the incidence, severity, and burden were calculated. The association between …

The Stability Of The Deadlift Three Repetition Maximum, Stuart N. Guppy, Tsuyoshi Nagatani, Wayne C. K. Poon, Kristina L. Kendall, Jason P. Lake, G. Gregory Haff

Research outputs 2022 to 2026

This study investigated the stability of three repetition maximum (3RM) strength during the deadlift. Eleven participants performed four testing sessions comprising a one repetition maximum test and 3RM tests separated by 48 h. Preparedness was assessed before each testing session using countermovement jumps and by measuring barbell velocity during each set of deadlifts. Trivial statistically significant differences were determined for the 3RM between T1 and both T2 (p = 0.012; ES [95% CI] = −0.1 [−0.58, 0.41]) and T3 (p = 0.027; ES [95% CI] = −0.09 [−0.57, −0.43]). No significant differences were noted between T2 and T3 …

The Effects Of A Unilateral Strength And Power Training Intervention On Inter-Limb Asymmetry And Physical Performance In Male Amateur Soccer Players, Francesco Bettariga, Luca Maestroni, Luca Martorelli, Paul Jarvis, Anthony Turner, Chris Bishop

Research outputs 2022 to 2026

The aims of this study were (a) to investigate the effects of a unilateral training program in reducing inter-limb asymmetry in male soccer players; (b) to explore such effects on measures of physical performance and unilateral inter-limb asymmetry. Twenty-four soccer players, randomly assigned to a 6-week unilateral strength and power training (UNI) (n = 12) or a control group (CON) (n = 12), performed single countermovement jump (SLCMJ), single leg broad jump (SLBJ), single leg drop jump (SLDJ), 10-m sprint, and 505 change of direction (COD) speed test. Raw jump scores revealed small to large improvements in SLCMJ, SLBJ, and …

Countermovement Jump And Squat Jump Force-Time Curve Analysis In Control And Fatigue Conditions, Steven Hughes, John Warmenhoven, G. Gregory Haff, Dale W. Chapman, Sophia Nimphius

Research outputs 2014 to 2021

This study aimed to reanalyze previously published discrete force data from countermovement jumps (CMJs) and squat jumps (SJs) using statistical parametric mapping (SPM), a statistical method that enables analysis of data in its native, complete state. Statistical parametric mapping analysis of 1-dimensional (1D) force-time curves was compared with previous zero-dimensional (0D) analysis of peak force to assess sensitivity of 1D analysis. Thirty-two subjects completed CMJs and SJs at baseline, 15 minutes, 1, 24, and 48 hours following fatigue and control conditions in a pseudo random cross-over design. Absolute (CMJ_ABS/SJ_ABS) and time-normalized (CMJ_NORM/SJ_NORM) …

Characterising Lower-Body Musculoskeletal Morphology And Whole-Body Composition Of Elite Female And Male Australian Football Players, Callum J. Mccaskie, Marc Sim, Robert U. Newton, Jarryd Heasman, Brent Rogalski, Nicolas H. Hart

Research outputs 2022 to 2026

Background: Physical demands and injury rates differ between elite female and male Australian Football (AF) players. To improve understanding of contributing physical factors to these differences, the purpose of this study was to investigate lower-body morphology and whole-body composition of elite footballers competing in the Australian Football League (AFL) and Australian Football League Women’s (AFLW). Methods: Lower-body morphology and whole-body composition of 23 AFL players and 23 AFLW players were assessed using peripheral Quantitative Computed Tomography and Dual-energy X-ray Absorptiometry at the beginning of pre-season. Differences between cohorts, with sub-analyses of kicking vs. support limbs, and experienced vs. inexperienced player …

Changes In Insulin Sensitivity And Lipid Profile Markers Following Initial And Secondary Bouts Of Multiple Eccentric Exercises, Trevor C. Chen, Min Jyue Huang, Leonardo C. R. Lima, Tai Ying Chou, Hung Hao Wang, Jui Hung Tu, Shi Che Lin, Kazunori Nosaka

Research outputs 2022 to 2026

An acute bout of eccentric exercise affects insulin sensitivity and lipid profile, but how the magnitude of muscle damage affects them is not clear. We compared changes in blood insulin sensitivity and lipid markers after the first (EC1) and second (EC2) eccentric exercise bouts. Fifteen sedentary young men performed arm, leg and trunk muscle eccentric exercises, and repeated them 2 weeks later. Fasting blood samples were taken before, 2 h and 1–5 days after each exercise bout to analyze plasma creatine kinase (CK) activity, serum glucose (GLU), insulin, homeostasis model assessment (HOMA), triacylglycerols (TG), total (TC) and low- (LDLC) and …

The Reliability And Magnitude Of Time-Dependent Force-Time Characteristics During The Isometric Midthigh Pull Are Affected By Both Testing Protocol And Analysis Choices, Stuart N. Guppy, Yosuke Kotani, Claire J. Brady, Shannon Connolly, Paul Comfort, Gregory G. Haff

Research outputs 2022 to 2026

This study aimed to investigate whether the use of short-duration (SHORT) isometric midthigh pull (IMTP) trials resulted in greater reliability and magnitude of time-dependent force-time characteristics than traditionally performed IMTP trials (TRAD). Fourteen subjects with > 6 months' training experience with the power clean volunteered to take part in the study. Subjects performed five ∼1-second IMTP trials (SHORT) and five 5-second IMTP trials (TRAD). SHORT resulted in substantially more reliable rate of force development (RFD) measures (intraclass correlation coefficient [ICC] = 0.97–0.99; coefficient of variation [CV] = 2.6–7.0%), particularly during time bands from force-onset to 150 ms, compared with TRAD when …

Myokine Expression And Tumor-Suppressive Effect Of Serum Following 12 Weeks Of Exercise In Prostate Cancer Patients On Adt, Jin-Soo Kim, Rebekah Louise Wilson, Dennis Taaffe, Daniel A. Galvao, Elin S. Gray, Robert Newton

Research outputs 2014 to 2021

Purpose:

Although several mechanisms have been proposed for the tumor-suppressive effect of exercise, little attention has been given to myokines, even though skeletal muscle is heavily recruited during exercise resulting in myokine surges. We measured resting serum myokine levels before and after an exercise-based intervention and the effect of this serum on prostate cancer cell growth.

Methods:

Ten prostate cancer patients undertaking androgen deprivation therapy (age, 73.3 ± 5.6 yr) undertook a 12-wk exercise-based intervention including supervised resistance training, self-directed aerobic exercise, and protein supplementation. Body composition was assessed by dual-energy x-ray absorptiometry and muscle strength by the one-repetition maximum …

Musculoskeletal Injury Epidemiology In Law Enforcement And Firefighter Recruits During Physical Training: A Systematic Review, Myles Calder Murphy, Holly-Ann George, Muhammad Naqi, Patrick J. Owen, Paola Chivers, Nicolas H. Hart

Research outputs 2022 to 2026

Objectives: Report the injury epidemiology of law enforcement and firefighter recruits. Design: A systematic epidemiological review following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses 2020 guidelines was completed. Data sources: Five online databases were searched from database inception to 5 May 2021. Eligibility criteria for selecting studies: Prospective and retrospective studies that reported data on musculoskeletal injuries sustained by law enforcement or firefighter recruits were included. We reported on all components of injury where data were available. All injury incidence rates were calculated as per 1000 training days (Poisson 95% CI) to allow comparisons between studies. Study quality …

Running Performance Of Male Versus Female Players In Australian Football Matches: A Systematic Review, Christopher Wing, Nicolas H. Hart, Callum Mccaskie, Petar Djanis, Fadi Ma’Ayah, Kazunori Nosaka

Research outputs 2014 to 2021

Background:

Australian Football is a fast paced, intermittent sport, played by both male and female populations. The aim of this systematic review was to compare male and female Australian Football players, competing at elite and sub-elite levels, for running performance during Australian Football matches based on the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA).

Methods:

Medline, SPORTDiscus, and Web of Science searches, using search terms inclusive of Australian Football, movement demands and microsensor technology, returned 2535 potential manuscripts, of which 33 were included in the final analyses.

Results:

Results indicated that male athletes performed approximately twice the total …

Eccentric-Only Versus Concentric-Only Resistance Training Effects On Biochemical And Physiological Parameters In Patients With Type 2 Diabetes, Christine Kudiarasu, Wafina Rohadhia, Yoshihiro Katsura, Tomoko Koeda, Favil Singh, Kazunori Nosaka

Research outputs 2014 to 2021

Background:

The benefits of resistance training for patients with type 2 diabetes (T2D) are well documented; however, the effects of exercise with different muscle contraction types such as eccentric versus concentric contractions on physiological outcomes for this population are not clear. This study compared eccentric-only (ECC) and concentric-only resistance training (CON) to test the hypothesis that ECC would be superior to CON to improve insulin sensitivity, lipid profile, body composition, muscle strength and physical function of patients with T2D.

Methods:

Adults with T2D (50–79 years) were allocated to the ECC (n = 9) or CON group (n = 9). Resistance …

A Comparison Of Manual And Automatic Force-Onset Identification Methodologies And Their Effect On Force-Time Characteristics In The Isometric Midthigh Pull, Stuart N. Guppy, Claire J. Brady, Yosuke Kotani, Shannon Connolly, Paul Comfort, Jason P. Lake, G. Gregory Haff

Research outputs 2014 to 2021

The aim of this study was to assess the agreement of three different automated methods of identifying force-onset (40 N, 5 SDs, and 3 SDs) with manual identification, during the isometric mid-thigh pull (IMTP). Fourteen resistance-trained participants with > 6 months experience training with the power clean volunteered to take part. After three familiarisation sessions, the participants performed five maximal IMTPs separated by 1 min of rest. Fixed bias was found between 40 N and manual identification for time at force-onset. No proportional bias was present between manual identification and any automated threshold. Fixed bias between manual identification and automated was …

Win, Draw, Or Lose? Global Positioning System-Based Variables’ Effect On The Match Outcome: A Full-Season Study On An Iranian Professional Soccer Team, Hadi Nobari, Norbert Keshish Banoocy, Rafael Oliveira, Jorge Pérez-Gómez

Research outputs 2014 to 2021

The aim of the study was to determine the between-match and between-halves match variability of various Global Positioning System (GPS) variables and metabolic power average (MPA) in competitions, based on the match results obtained by professional soccer players over a full season. Observations on individual match performance measures were undertaken on thirteen outfield players competing in the Iranian Premier League. The measures selected for analysis included total duration, accelerations in zones (AccZ1, 2, and 3), decelerations in zones (DecZ1, 2, and 3), and MPA collected by the Wearable Inertial Measurement Unit (WIMU). The GPS manufacturer set the thresholds for the …

The Influence Of Mental Fatigue On Sessional Ratings Of Perceived Exertion In Elite Open And Closed Skill Sports Athletes, Joseph O. C. Coyne, Aaron J. Coutts, Robert U. Newton, G. Gregory Haff

Research outputs 2014 to 2021

ABSTRACT: Coyne, JOC, Coutts, AJ, Newton, RU, and Haff, GG. The influence of mental fatigue on sessional ratings of perceived exertion in elite open and closed skill sports athletes. J Strength Cond Res 35(4): 963-969, 2021-The main purpose of this investigation was to examine influence of mental fatigue on sessional ratings of perceived exertion (sRPE) over a training week in elite athletes in open skill (OS, i.e., more unpredictable and externally paced sports) and closed skill (CS, i.e., more predictable and internally paced) sports. Visual analogue scales for mental fatigue, sRPE (CR-10 scale), and training duration were collected from an …

Fitness Testing Parameters For Alpine Ski Racing, James J. Pritchard

Research outputs 2014 to 2021

Alpine ski racing requires high levels of isometric, eccentric, and concentric muscle actions through wide ranges of hip, knee, and ankle mobility. The course duration of ∼ 40 seconds for slalom racing to upward of 2.5 minutes for downhill racing necessitates high levels of anaerobic endurance, aerobic power, and force production to be successful. In addition, due to the highly technical skill aspect of ski racing, neuromuscular coordination is of utmost importance. This review identifies the most effective performance testing methods for alpine ski racing, as well as highlighting their relevance to the physiological parameters of the sport.

Relationships Between Internal Training Load In A Taper With Elite Weightlifting Performance Calculated Using Different Moving Average Methods, Joseph O. C. Coyne, Robert U. Newton, G. Gregory Haff

Research outputs 2014 to 2021

Purpose:

A simple and 2 different exponentially weighted moving average methods were used to investigate the relationships between internal training load and elite weightlifting performance.

Methods:

Training impulse data (sessional ratings of perceived exertion × training duration) were collected from 21 elite weightlifters (age = 26.0 [3.2] y, height = 162.2 [11.3] cm, body mass = 72.2 [23.8] kg, previous 12-mo personal best total 96.3% [2.7%] of world record total) during the 8 weeks prior to the 2016 Olympic Games qualifying competition. The amount of training modified or cancelled due to injury/illness was also collected. The training stress balance (TSB) …

Relationships Between Different Internal And External Training Load Variables And Elite International Women’S Basketball Performance, Joseph Coyne, Aaron J. Coutts, Robert Newton, Greg Haff

Research outputs 2014 to 2021

Purpose:

To investigate the relationships between internal and external training load (TL) metrics with elite international women’s basketball performance.

Methods:

Sessional ratings of perceived exertion, PlayerLoad^™/minute, and training duration were collected from 13 elite international-level female basketball athletes (age 29.0 [3.7] y, stature 186.0 [9.8] cm, body mass 77.9 [11.6] kg) during the 18 weeks prior to the International Basketball Federation Olympic qualifying event for the 2016 Rio Olympic Games. Training stress balance, differential load, and the training efficiency index were calculated with 3 different smoothing methods. These TL metrics and their change in the last 21 days …

Reliability Of Isokinetic Tests Of Velocity‐ And Contraction Intensity‐Dependent Plantar Flexor Mechanical Properties, Matheus D. Pinto, Cody J. Wilson, Anthony D. Kay, Anthony J. Blazevich

Research outputs 2014 to 2021

“Flexibility” tests are traditionally performed voluntarily relaxed by rotating a joint slowly; however, functional activities are performed rapidly with voluntary/reflexive muscle activity. Here, we describe the reliabilities and differences in maximum ankle range of motion (ROM_max) and plantar flexor mechanical properties at several velocities and levels of voluntary force from a new test protocol on a commercially available dynamometer. Fifteen participants had their ankle joint dorsiflexed at 5, 30, and 60° s⁻¹ in two conditions: voluntarily relaxed and while producing 40% and 60% of maximal eccentric torque. Commonly reported variables describing ROM_max and resistance to stretch …

Evaluating Match Running Performance In Elite Australian Football: A Narrative Review, Christopher Wing, Nicolas H. Hart, Fadi Ma’Ayah, Kazunori Nosaka

Research outputs 2014 to 2021

During Australian football (AF) matches, players are subjected to high running loads, which are intermittent in nature. There is a growing body of research that highlights factors which can both positively and negatively affect this match running performance (e.g., the total distance travelled by a player during match-play). In order to appropriately evaluate these factors, a thorough search of MEDLINE, SportDiscus and Web of Science databases was performed, with a total of 17 manuscripts included within the final evaluation. The main findings from this review highlighted that match running performance is increased amongst those playing in midfield and half back/forward …

Influence Of The Covid-19 Pandemic On Mood And Training In Australian Community Tennis Players, Mitchell Turner, Philipp Beranek, Shane L. Rogers, Kazunori Nosaka, Olivier Girard, Travis Cruickshank

Research outputs 2014 to 2021

The COVID-19 outbreak has led to the implementation of strict restrictions in Australia, which have severely impacted sporting activities. Tennis is played by 6.2% of the population within the Oceania region, and is a valuable sport for maintaining social, mental, and physical health. Current literature indicates the COVID-19 pandemic has negatively affected the mental health of Australian residents. The aim of this study was to investigate changes in training and match play due to the outbreak, and its effects on emotional well-being of Australian senior tennis players. Additionally, explore any differences between middle aged (41-60 years) and senior (61 years …

An Assessment Of The Hopping Strategy And Inter-Limb Asymmetry During The Triple Hop Test: A Test–Retest Pilot Study, Kyle Davey, Paul Read, Joseph Coyne, Paul Jarvis, Anthony Turner, Jon Brazier, Nejc Šarabon, Matthew J. Jordan, Chris Bishop

Research outputs 2014 to 2021

The aims of the present study are to: (1) determine within-and between-session reliability of multiple metrics obtained during the triple hop test; and (2) determine any systematic bias in both the test and inter-limb asymmetry scores for these metrics. Thirteen male young American football athletes performed three trials of a triple hop test on each leg on two separate occasions. In addition to the total distance hopped, manual detection of touch down and toe-off were calculated via video analysis, enabling flight time (for each hop), ground contact time (GCT), reactive strength index (RSI), and leg stiffness (between hops) to be …