Sports Sciences Commons^™

What Is Resistance Exercise? A Review Of Current Uses And Potential Ways Forward, Lars H. Lohmann, José Afonso, David G. Behm, Stanislaw D. Siegel, Michael Keiner, Klaus Wirth, Anthony J. Blazevich, Eric R. Helms, Alyssa Joy Spence, Konstantin Warneke

Research outputs 2022 to 2026

The resistance exercise (RE) literature highlights the importance and impact of RE in sports performance, daily life, and clinical outcomes. While RE research dates back to the 19th century, current definitions of what constitutes RE are varied and give rise to questions about the requisites of RE. For example, some definitions refer to movements or muscle contractions against external resistance whereas others consider all repeated actions against one’s bodyweight. Taken to the limit, this could introduce confusion between RE and endurance exercise, for example. Without a clear definition, systematic reviews (with meta-analysis) discuss outcomes of studies examining the effects of …

Does Performing Partial Repetitions Beyond Momentary Failure Enhance Muscle Hypertrophy In Volume-Load-Equated Calf-Raise Resistance Training?, Amirali Goli, Parsa Attarieh, João Pedro Nunes, Saman Nehegadar, Saaed Khani, Mohmad Fashi, Sajjad Ahmadizad

Research outputs 2022 to 2026

The aim of this study was to determine whether extending traditional calf-raise resistance training sets with partial-range-of-motion (ROM) repetitions in the more dorsiflexed ROM enhances muscular hypertrophy. Sixteen untrained men (25.0±1.7y) completed 10 weeks of unilateral standing calf-raise training (2×/wk) in a within-subject design: one leg performed traditional 10-14RM sets to full-ROM momentary failure (MF; 4-6 sets/session) and the other leg performed half as many sets to full-ROM failure followed by partial-ROM repetitions to a second failure in the more dorsiflexed ROM (PBF; 2-3 sets/session). Total volume-load was equated between conditions; repetitions were counted the same way regardless of the …

Enhancing Physical Performance With Ischemic Preconditioning: A Systematic Review And Meta-Analysis Of Moderators And Performance Outcomes, Yilin Zhang, Kai Xu, Hao Kong, Mingyue Yin, Chenghao Liu, Yun Xie, Liam Kilduff, Gustavo R. Mota, Olivier Girard

Research outputs 2022 to 2026

This study examined the effects of ischemic preconditioning (IPC) on physical performance, considering the influence of timing, warm-up (WU), participant characteristics, and IPC protocols structure. A total of 90 trials (1,439 participants) were retrieved from three databases and assessed using PICOS criteria. Multilevel meta-analyses with cluster-robust variance adjustments were conducted to calculate pooled effect sizes (Hedge’s g). Risk of bias and certainty of evidence were assessed using the RoB 2 tool and GRADE framework. IPC produced a trivial but significant improvement in physical performance (g = 0.13, P < 0.01), which persisted after excluding SHAM effects (g = 0.10; P < 0.01). Significant improvements were observed for maximum repetitions, time to failure, and power output, but not for jump ability, strength, or oxygen uptake. Comparable benefits were found for anaerobic (g = 0.15) and aerobic (g = 0.10) exercise, with greater effects in males and less-trained participants. Performance was further enhanced when IPC was followed by WU (g = 0.16), with the optimal IPC-to-WU interval being ~42 minutes. Without WU, the effective IPC window narrowed to 6–7 minutes. In practice, IPC can enhance physical performance, independently of sham effects, moderated by sex, training level, and WU. For competition or testing, the most effective strategy appears to be 3 or 4 × 5-min IPC protocol, followed by a 42-min interval, standardized warm-up, and endurance testing. For mechanistic studies, WU should be excluded, and testing conducted 6-7 minutes post-IPC. Future research should target women, middle-aged individuals, and elite athletes.

Influence Of Isometric Hamstring Assessment Modality: Asymmetries Across Bilateral And Unilateral Testing Procedures, Adam E. Sundh, Nicholas J. Ripley, A. J. Lamb, Conor J. Cantwell, Paul Comfort

Research outputs 2022 to 2026

Purpose: The aim of this study was to evaluate whether unilateral and bilateral assessments display comparable results during the isometric long-lever bridge and to examine the directionality of asymmetry fluctuations across testing occasions. Methods: Forty-four participants comprising of 30 men (age: 19.4 ± 1.3 years; height: 179.8 ± 6.3 cm; body mass: 80.4 ± 10.3 kg) and 14 women (age: 20.0 ± 1.3 years; height: 166.9 ± 7.2 cm; body mass: 64.4 ± 7.4 kg) volunteered to participate in the study. All participants completed two separate testing sessions consisting of two maximal bilateral and unilateral repetitions respectively of the isometric …

One Of These Things Is Not Like The Others: Disentangling The Concepts Of Range Of Motion Versus Flexibility, And Flexibility Training Versus Stretching, José Afonso, Anthony J. Blazevich, David George Behm, Markus Tilp, Konstantin Warneke

Research outputs 2022 to 2026

In this Current Opinion, we revisit key terminological distinctions in sports sciences, emphasizing the implications of conflating related but distinct concepts, particularly range of motion (ROM) versus flexibility and flexibility training versus stretching. While often used interchangeably, these terms represent nuanced constructs with distinct physiological and practical implications. ROM encompasses both modifiable (e.g., soft tissue extensibility, neural control) and non-modifiable factors (e.g., bone structure), whereas flexibility is only one of several trainable components of ROM, largely referring to the extensibility of periarticular soft tissues. Misunderstanding these distinctions risks erroneous assessments and inappropriate exercise prescriptions. We also challenge the common practice …

Unifying To Advance Understanding: Collaborative, Community-Driven And ‘Open’ Approaches For Better Science In Sport, John Warmenhoven, Ian Shrier, Garrett S. Bullock, Alex O. Holcombe, Sophia Nimphius, Paolo Menaspà, Aaron J. Coutts, Franco M. Impellizzeri

Research outputs 2022 to 2026

Historically, sport science and medicine researchers have had difficulty obtaining adequate sample sizes, limiting their ability to make accurate generalizations to populations of athletes. To move towards better and more generalizable research, sport could look to other fields of research, and draw upon collaborative approaches for performing science. These include concepts such as big teams approaches for conducting experimental research, developing data repositories centred on a holistic inter-disciplinary view of the athlete and exploring privacy preserving meta-analytic inspired concepts such as federated analyses or pooled synthetic data. These approaches have enormous potential but do come with their own difficulties and …

An Exploratory Survey Of The Application Of Accentuated Eccentric Loading In Resistance Training, Jiahao Yang, Comfort, Kristina Kendall, G. Gregory Haff

Research outputs 2022 to 2026

The aim of this study was to investigate how accentuated eccentric loading (AEL) is currently utilised by strength and conditioning (S&C) coaches. The survey consisted of closed- and open-ended questions divided into 3 key areas of focus (1-Coach and Athlete Demographic, 2-Perceptions of AEL, and 3-Program Design) was administered to S&C coaches. Response frequencies for sections 1 and 2 were calculated as percentages of total respondents, whereas frequencies in Section 3 were calculated relative to respondents who selected each specific training purpose. A thematic analysis was conducted for the responses to an open-ended question. A total of 38 respondents met …

Aspiring Athletes Managing Sport, Education, Social, And Family Life: A Scoping Review, Donna Howard, Ivan Jeftic, Paul Goods, Ben Jackson, Caitlin Fox-Harding, Michael Rosenberg

Research outputs 2022 to 2026

Objectives: This scoping review considers the experiences of aspiring high school-aged athletes as they navigate the complexities of managing sport, education, social, and family life. The review synthesises existing literature on the decisions, barriers, facilitators, and support systems that influence aspiring athletes' pathways. Design: Systematic scoping review. Methods: Following the PRISMA-ScR framework, four databases were searched (SCOPUS, SPORTDiscus, PsycInfo, CINAHL), and studies involving aspiring high school aged athletes were uploaded to Covidence. Results: Across the four databases 1781 studies were identified through abstract screening and 61 of these studies were used for the final review. Despite the significant commitment that …

Influence Of Chronotype On Cycling Performance In Simulated 20-Km Time Trials—A Pilot Study, Sabrina Forster, Sascha Schwindling, Chris Abbiss, Fabienne Döringer, Andreas Klütsch, Anne Hecksteden, Tim Meyer

Research outputs 2022 to 2026

The chronotype (CT) refers to an individual's diurnal preference towards morningness (M) or eveningness (E). The aim of this study was to determine the influence of chronotype on 20-km cycling performance throughout the day. Seventy-six competitive male cyclists and triathletes completed the Morningness-Eveningness Questionnaire to determine chronotype. Only participants categorised as ‘definite’ M- (n = 10) and E-types (n = 7) were included in the study. In a randomised order and separated by 2–7 days, participants performed four self-paced 20-km cycling time trials at four different times of the day (06:00 h, 12:00 h, 18:00 h, 22:00 h). Mental readiness …

Single Joint Posterior Chain Isometric Testing Using Force Plates: A Systematic Review Of The Methodologies And Reliability Of Testing Methods, Jack T. Fahey, Christopher Bramah, Richie Barber, James Williams, John J. Mcmahon, Paul Comfort, Nicholas J. Ripley

Research outputs 2022 to 2026

The posterior chain muscles (i.e. hamstring and gluteal) play an important role in performance and injury prevention. Posterior chain muscle injuries lead to time lost from training, competition and increased reinjury risk. Force plates enable valid and reliable assessment, current methods assessing isometric posterior chain (IPC) force production using force plates have yet to be reviewed. This review was designed to systematically review methods of single joint IPC force plate testing; establish existing reliability; and summarise descriptive data. A literature search was conducted using the following search terms: ‘force plat*’ AND ‘isometric’ AND (‘hamstring*’ OR ‘knee flex*’ OR ‘posterior chain’ …

Two Strategies To Improve Stability In A Precision-Based Task: Insights From The Badminton Short Serve, Yochi Iino, Jodie Cochrane Wilkie, Senshi Fukashiro, Shinsuke Yoshioka, Shayne Vial

Research outputs 2022 to 2026

The badminton short serve is a highly precise task requiring accurate control of racquet face orientation, which directly influences shuttlecock trajectory and limits an opponent's ability to attack. Previous studies on motor redundancy have emphasized covariation among elemental variables as the primary mechanism for stabilizing performance. However, when the sensitivities of elemental variables differ, performance can also be stabilized by unevenly distributing individual variances without altering correlation — an approach that has received limited attention. This study investigated whether elite players use both the correlation strategy and the uneven variance strategy to stabilize racquet face angles during the short serve. …

Superior Effects Of High-Intensity Interval Eccentric Cycling Training On Neuromuscular Adaptations With Similar Aerobic Adaptations To Concentric Cycling, Marcin Lipski, Joanne Trezise, Chris R. Abbiss, Kazunori Nosaka

Research outputs 2022 to 2026

Purpose: We compared the effects of high-intensity interval eccentric (EC) versus concentric cycling (CC) training on aerobic capacity, muscle function and morphology. Methods: Healthy men (19–56 y) performed EC (n = 9) or CC (n = 8) training twice a week for 8 weeks. The training progressed from 5 × 2-min intervals with 1-min rest to 7 × 2-min intervals with 30-s rest. EC and CC were matched for perceived effort, and progressed from 30 to 36% of concentric peak power output (PPO10s) for CC and from 45 to 70% PPO10s for EC. Changes in peak oxygen consumption (VO2peak), incremental …

Acute Effects Of Re-Warm-Up On Physical Performance, Muscle Temperature, And Perceived Exertion In Basketball Players: A Systematic Review And Meta-Analysis With Individual Participant Data, Yu Feng Yang, Enrique Flórez-Gil, Christos Koutsouridis, Yu Ming Zhong, Nuno Mateus, Eduardo Abade, Ching Feng Cheng, Mengde Lyu, Kai Xu

Research outputs 2022 to 2026

Objectives: (1) the acute effects of RWU on physical performance, body temperature (BT), and rating of perceived exertion (RPE) in basketball players; and (2) individual-level performance improvements across different RWU methods.

Methods: Three databases were searched for RWU studies in basketball players. An individual participant data meta-analysis was conducted using a two-stage approach with multilevel models, including adjustments for small sample sizes. Effect sizes were expressed as standardized mean changes (SMC) for within-group comparisons and standardized mean differences (SMD) for between-group comparisons.

Results: Seven studies (n = 82; 35 females, 47 males) were included, with individual raw data obtained from …

Hamstring Strength Assessment Methods In Sport: A Systematic Review And Meta-Analysis Of Post-Activity Strength Decrements, Asymmetry Benchmarks, And Measurement Reliability, Adam E. Sundh, Nicholas J. Ripley, A. J. Lamb, Paul Comfort

Research outputs 2022 to 2026

Hamstring strain injuries (HSI) represent one of the most prevalent and recurrent injuries in sport, making reliable strength assessment essential for neuromuscular monitoring in athletic populations. Despite the breadth of available testing modalities, no comprehensive synthesis of assessment methods, their reliability, post-activity strength responses, or normative asymmetry values has been undertaken. This systematic review and meta-analysis aims to evaluate the reliability of hamstring strength assessment methods, quantify the time-course of strength decrements following competition, establish normative inter-limb asymmetry benchmarks, and identify gaps to guide future assessment practices. PubMed, Scopus, SPORTDiscus, and Web of Science were searched from inception to November …

Mechanisms Influencing Maximum Joint Range Of Motion And Stiffness: A Narrative Review, Camila D. Lima, Anthony J. Blazevich

Research outputs 2022 to 2026

Joint ‘flexibility’ is an encompassing term influenced by both a joint’s maximum range of motion (ROMmax) and its resistance to rotation, i.e. its stiffness. A critical amount of flexibility is thought to be important for both sports performance and daily and occupational tasks. Improvements in joint ROMmax, specifically, are often assumed to result from material and mechanical changes in the joint’s soft tissue structures; however, they also may result from changes in sensory information relayed from peripheral receptors to the brain, or the interpretation of that information. Changes in psychological state mediated by pain, state arousal and other psychological factors …

Post Activation Performance Enhancement Effects On Countermovement Jumps In Men And Women, Gabriel Felipe Arantes Bertochi, Márcio Fernando Tasinafo Júnior, Leonardo Lima, Kazunori Nosaka, Enrico Fuini Puggina

Research outputs 2022 to 2026

The present study investigated the post-activation performance enhancement (PAPE) effects of six different conditioning activities on countermovement jump (CMJ) height and compared the PAPE effects between sexes. We recruited 18 male and 17 female participants (age: 24.6 ± 3.7 y, height: 1.71 ± 0.10 m, body mass: 75.7 ± 16.1 kg) with at least one year of resistance exercise experience. They performed a familiarization session in which the one-repetition maximum back squat (1-repetition maximum back squat: 134 ± 32 kg; 1- repetition maximum back squat/body mass: 1.8 ± 0.4) was assessed. This was followed by six visits for six different …

Relationships Between Physical Performance Characteristics And Match Characteristics Of English Academy Soccer Players, B. Dickinson, P. Jones, P. Comfort

Research outputs 2022 to 2026

The aim of this study was to determine the relationships between physical performance and match characteristics of Elite academy soccer players using pooled data across U15, U16, U18, U23 age groups. Sixty elite academy soccer players including u15 (Subject: N = 15; age: 14.64 ± 0.25; mass: 59.88 ± 9.12 kg; height: 171 ± 6.69 cm), u16 (Subject: N = 15; age: 15.42 ± 0.36; mass: 65.11 ± 8.70 kg; height: 175 ± 7.21 cm), u18 (Subject: N = 15; age: 17.00 ± 1.00; mass: 72.85 ± 7.43 kg; height: 179 ± 6.43 cm), u23 (Subject: N = 15; age: …

Single Joint Assessment Of Isometric Plantarflexor Force Characteristics Using Portable Force Plates: A Systematic Review Of Methods And Reliability, James Williams, Paul Comfort, Nicholas J. Ripley, Jack T. Fahey, Ritchie Barber, Christopher Bramah

Research outputs 2022 to 2026

The aim of this systematic review was to (1) identify differences in isometric force plate testing procedures for the ankle plantarflexors and (2) determine the reliability of existing methods to inform minimum reporting standards. A systematic search of PubMed, Web of Science, Google Scholar, MEDLINE and CINAHL was conducted from inception to 2025, for peer-reviewed studies using portable force plates to assess isometric plantarflexor force. PRISMA guidelines were followed. Two independent reviewers assessed methodological quality using the COSMIN Risk of Bias tool and Mixed Methods Appraisal Tool, with discrepancies resolved collaboratively. Twenty studies met the inclusion criteria, revealing methodological variations …

The Evolution Of Match-Play In Major League Soccer From 2018 To 2023, Callum J. Mccaskie, Christopher Wing

Research outputs 2022 to 2026

Major League Soccer (MLS) has experienced significant growth since its establishment 30 years ago. However, no research has investigated the on-field performance trends. Thus, the purpose of this study was to examine the evolution of MLS match-play via technical and tactical key performance indicators, and investigate the differences between teams according to league finishing position. MLS on-field performance indicators were obtained across six seasons from open-source website FBref. Mean game values were collected from 21 match performance indicators for every MLS team over six seasons. Teams were also classified according to their league finishing position at the conclusion of each …

An Exploratory Analysis Of The Role Of Sex In Load Carriage, Rachel E. Perez, Dustin R. Slivka, Brent C. Ruby

Graduate Student Theses, Dissertations, & Professional Papers

Axially loaded weight may impose a metabolic demand equivalent to that of fat mass (FM) during load carriage. Males (M) typically have a lower body fat percentage than females (F), resulting in metabolic demand differences during load carriage that may be mitigated by accounting for FM in pack loads. PURPOSE: To determine whether normalizing pack load to FM equalizes metabolic cost across sexes during load carriage. METHODS: Twenty-eight participants (14M, 23 ± 5 y, 1.81 ± 0.07 m, 78.7 ± 10.0 kg, 12.7 ± 5.4% body fat, VO₂peak 4.18 ± 0.54 L·min^-1; 14F, 22 ± 4 …