Medicine and Health Sciences Commons^™

Influence Of Physical And Technical Aspects On Change Of Direction Performance Of Rugby Players: An Exploratory Study, Tomás T. Freitas, Pedro E. Alcaraz, Julio Calleja-González, Ademir F. S. Arruda, Aristide Guerriero, Valter P. Mercer, Lucas A. Pereira, Felipe P. Carpes, Michael R. Mcguigan, Irineu Loturco

Research outputs 2014 to 2021

We examined the relationships between change of direction (COD) speed and deficit, and a series of speed-and power-related measurements in national team rugby union players and analyzed the influence of movement patterns on COD ability. Eleven male athletes completed the following physical assessments on different days: day 1—anthropometric measurements, and lower-body kinematic parameters (assessed with eight inertial sensors) and completion time in COD tests (proagility, 45◦ cutting maneuver (CUT), and “L” (L-Drill)); day 2—bilateral and unilateral squat and countermovement jumps, 40 m linear sprint, and bar-power output in the jump squat and half-squat exercises. Pearson’s product–moment correlations were performed to …

Content Analysis Of Patent Applications For Strength Training Equipment Filed In The United States Before 1980, James L. Nuzzo

Research outputs 2014 to 2021

Nuzzo, JL. Content analysis of patent applications for strength training equipment filed in the United States before 1980. J Strength Cond Res 35(10): 2952–2962, 2021—Strength training history is an emerging academic area. The aim of the current study was to describe quantitively the history of inventions for strength training equipment. Content analysis was conducted of patent applications for strength training equipment filed with the U.S. Patent and Trademark Office before 1980. Applications were identified using relevant keyword searches in Google Patents. A total of 551 patent applications were analyzed. The earliest application identified was filed in 1860. Applications never exceed …

Kinematic And Neuromuscular Measures Of Intensity During Drop Jumps In Female Volleyball Players, Maximiliano Torres-Banduc, Rodrigo Ramirez-Campillo, David Cristobal Andrade, Julio Calleja-González, Pantelis Theo Nikolaidis, John J. Mcmahon, Paul Comfort

Research outputs 2014 to 2021

The aim of this study was to assess drop jump (DJ) performance variables (jump height, contact time, and reactive strength index) concomitant to surface electromyography (sEMG) of lower limb muscles during DJs from different drop heights (intensities). The eccentric and concentric phase sEMG from the gastrocnemius medialis, biceps femoris, and vastus medialis muscles were assessed during all tests, with sEMG activity normalized to maximal voluntary isometric contraction (MVIC). In a cross-sectional, study, 10 amateur female volleyball players (age 22.1 ± 1.8 years; body mass 72.9 ± 15.2 kg; height 1.70 ± 0.08 m) completed DJs from six heights [15-90 cm …

The Bench Press Grip Width Does Not Affect The Number Of Repetitions Performed At Different Velocity Loss Thresholds, Alejandro Pérez-Castilla, Ivan Jukic, G. Gergory Haff, Amador García-Ramos

Research outputs 2014 to 2021

© 2021 by the authors. Licensee MDPI, Basel, Switzerland. This study aimed (I) to compare the number of repetitions that can be completed to failure (XRM) and before reaching a 15%, 30%, or 45% velocity loss threshold (XVLT) in the bench press exercise performed using different grip widths, and (II) to examine the inter-individual variability in the percentage of completed repetitions with respect to the XRM when the set volume is prescribed based on a fixed number of repetitions (FNR) and several velocity loss thresholds (VLT). Nineteen men performed four separate sessions in a random order where there was a …

Effects Of Variations In Resistance Training Frequency On Strength Development In Well-Trained Populations And Implications For In-Season Athlete Training: A Systematic Review And Meta-Analysis, Matthew Cuthbert, G. Gregory Haff, Shawn M. Arent, Nicholas Ripley, John J. Mcmahon, Martin Evans, Paul Comfort

Research outputs 2014 to 2021

Background: In-season competition and tournaments for team sports can be both long and congested, with some sports competing up to three times per week. During these periods of time, athletes need to prepare technically, tactically and physically for the next fixture and the short duration between fixtures means that, in some cases, physical preparation ceases, or training focus moves to recovery as opposed to progressing adaptations. Objective: The aim of this review was to investigate the effect of training frequency on muscular strength to determine if a potential method to accommodate in-season resistance training, during busy training schedules, could be …

Evaluating A Web- And Telephone-Based Personalised Exercise Intervention For Individuals Living With Metastatic Prostate Cancer (Exerciseguide): Protocol For A Pilot Randomised Controlled Trial, Holly E. L. Evans, Cynthia C. Forbes, Daniel A. Galvão, Corneel Vandelanotte, Robert U. Newton, Gary Wittert, Suzanne Chambers, Andrew D. Vincent, Ganessan Kichenadasse, Nicholas Brook, Danielle Girard, Camille E. Short

Research outputs 2014 to 2021

© 2021, The Author(s). Introduction: Preliminary research has shown the effectiveness of supervised exercise-based interventions in alleviating sequela resulting from metastatic prostate cancer. Despite this, many individuals do not engage in sufficient exercise to gain the benefits. There are many barriers, which limit the uptake of face-to-face exercise in this population including lack of suitable facilities, remoteness, and access to experts, significant fatigue, urinary incontinence and motivation. Technology-enabled interventions offer a distance-based alternative. This protocol describes a pilot two-armed randomised controlled study that will investigate the feasibility and preliminary efficacy of an online exercise and behavioural change tool (ExerciseGuide) amongst …

Using Velocity To Predict The Maximum Dynamic Strength In The Power Clean, G. Gregory Haff, Amador Garcia-Ramos, Lachlan P. James

Research outputs 2014 to 2021

The primary aim of the present study was to examine the commonly performed training exercise for athlete preparation. Twenty-two recreationally trained males (age: 26.3 ± 4.1 y, height: 1.80 ± 0.07 m; body mass (BM): 87.01 ± 13.75 kg, 1-repetitoon maximum(1-RM)/BM: 0.90 ± 0.19 kg) participated in the present study. All subjects had their 1-RM power clean tested with standard procedures. On a separate testing day, subjects performed three repetitions at 30% and 45%, and two repetitions at 70% and 80% of their 1-RM power clean. During all trials during both sessions, peak velocity (PV) and mean velocity (MV) were …

Autoregulation In Resistance Training: Addressing The Inconsistencies, Leon Greig, Ben Hayden Stephens Hemingway, Rodrigo R. Aspe, Kay Cooper, Paul Comfort, Paul A. Swinton

Research outputs 2014 to 2021

© 2020, The Author(s). Autoregulation is a process that is used to manipulate training based primarily on the measurement of an individual’s performance or their perceived capability to perform. Despite being established as a training framework since the 1940s, there has been limited systematic research investigating its broad utility. Instead, researchers have focused on disparate practices that can be considered specific examples of the broader autoregulation training framework. A primary limitation of previous research includes inconsistent use of key terminology (e.g., adaptation, readiness, fatigue, and response) and associated ambiguity of how to implement different autoregulation strategies. Crucially, this ambiguity in …

Isokinetic Eccentric Exercise Substantially Improves Mobility, Muscle Strength And Size, But Not Postural Sway Metrics In Older Adults, With Limited Regression Observed Following A Detraining Period, Anthony David Kay, Anthony John Blazevich, Millie Fraser, Lucy Ashmore, Mathew William Hill

Research outputs 2014 to 2021

© 2020, The Author(s). Introduction: Eccentric exercise can reverse age-related decreases in muscle strength and mass; however, no data exist describing its effects on postural sway. As the ankle may be more important for postural sway than hip and knee joints, and with older adults prone to periods of inactivity, the effects of two 6-week seated isokinetic eccentric exercise programmes, and an 8-week detraining period, were examined in 27 older adults (67.1 ± 6.0 years). Methods: Neuromuscular parameters were measured before and after training and detraining periods with subjects assigned to ECC (twice-weekly eccentric-only hip and knee extensor contractions) or …

Foam Rolling As A Recovery Tool Following Eccentric Exercise: Potential Mechanisms Underpinning Changes In Jump Performance, Eric J. Drinkwater, Christopher Latella, Christopher Wilsmore, Stephen P. Bird, Melissa Skein

Research outputs 2014 to 2021

Purpose: Recovery from exercise-induced muscle damage (EIMD) is paramount in sports performance. Foam rolling (FR) has been suggested to improve acute performance; however, the ability to facilitate recovery from eccentric (ECC) exercise remains unclear.

Methods: Eleven males undertook 6 × 25 ECC knee extensions to induce muscular damage. Immediately, 24, 48, and 72 h post-training countermovement jump (CMJ), maximal voluntary isometric contraction (MVIC), pressure-pain threshold (PPT), knee flexion range of motion (ROM), and mid-thigh circumference (MTC) were assessed. Neurophysiological measures included voluntary activation (VA), peak twitch torque (PTT), time to peak twitch (PTT_time), and rate of twitch torque …

Mechanical Suppression Of Osteolytic Bone Metastases In Advanced Breast Cancer Patients: A Randomised Controlled Study Protocol Evaluating Safety, Feasibility And Preliminary Efficacy Of Exercise As A Targeted Medicine, Nicolas H. Hart, Daniel A. Galvão, Christobel Saunders, Dennis R. Taaffe, Kynan T. Feeney, Nigel A. Spry, Daphne Tsoi, Hilary Martin, Raphael Chee, Tim Clay, Andrew D. Redfern, Robert U. Newton

Research outputs 2014 to 2021

BACKGROUND: Skeletal metastases present a major challenge for clinicians, representing an advanced and typically incurable stage of cancer. Bone is also the most common location for metastatic breast carcinoma, with skeletal lesions identified in over 80% of patients with advanced breast cancer. Preclinical models have demonstrated the ability of mechanical stimulation to suppress tumour formation and promote skeletal preservation at bone sites with osteolytic lesions, generating modulatory interference of tumour-driven bone remodelling. Preclinical studies have also demonstrated anti-cancer effects through exercise by minimising tumour hypoxia, normalising tumour vasculature and increasing tumoural blood perfusion. This study proposes to explore the promising …

Relationship Between Strength And Power Production Capacities In Trained Sprint Track Cyclists, James Vercoe, Mike R. Mcguigan

Research outputs 2014 to 2021

The purpose of this study was to investigate the relationship between strength and power capabilities in trained sprint track cyclists. Ten participants including six women and four men (age: 22.1±6.8 years, body height: 176.1±6.7 cm, body weight: 72.1±7.9 kg) performed isometric mid-thigh pull (IMTP) and isokinetic sprint tests. Variables measured included peak force (PF), peak rate of force development (PRFD) for the IMTP and maximal torque and maximal power (Pmax) for the isokinetic sprint test. There was a strong relationship between PF on the IMTP and maximal peak torque values across five isokinetic sprints (r=.890-.925). Strong relationships were also shown …

Effects Of Cluster Sets And Rest-Redistribution On Mechanical Responses To Back Squats In Trained Men, James J. Tufano, Jenny A. Colon, Sophia Nimphius, Lee E. Brown, Alex Petkovic, Justin Frick, Greg Haff

Research outputs 2014 to 2021

Eight resistance-trained men completed three protocols separated by 48-96 hours. Each protocol included 36 repetitions with the same rest duration, but the frequency and length of rest periods differed. The cluster sets of four (CS4) protocol included 30 s of rest after the 4th, 8th, 16th, 20th, 28th, and 32nd repetition in addition to 120 s of rest after the 12th and 24th repetition. For the other two protocols, the total 420 s rest time of CS4 was redistributed to include nine sets of four repetitions (RR4) with 52.5 s of rest after every four repetitions, or 36 sets of …

Effect Of Four Weeks Detraining On Strength, Power, And Sensorimotor Ability Of Adolescent Surfers, Tai T. Tran, Lina Lundgren, Josh Secomb, Oliver R. Farley, Greg Haff, Sophia Nimphius, Robert Newton, Lee Brown, Jeremy Sheppard

Research outputs 2014 to 2021

Background:

Surfing is a high skill sport that requires a considerable amount of time in a variety of ocean conditions to help develop the fundamental techniques.

Objective:

The purpose of this study was to investigate the effect of four weeks of detraining on strength, power, and sensorimotor ability in adolescent surfers.

Methods:

Nineteen adolescent surfers (13.8 A 1.7 y, 53.6 A 10.8 kg and 165.1 A 8.9 cm) participated in four weeks of detraining (surfing participation maintained but resistance training ceased) following seven weeks of periodized resistance training. Maximal isometric strength, power, and sensorimotor ability pre-test results were determined from …

Greater Strength Gains After Training With Accentuated Eccentric Than Traditional Isoinertial Loads In Already Strength-Trained Men, Simon Walker, Anthony J. Blazevich, Greg Haff, James J. Tufano, Robert Newton, Keijo Häkkinen

Research outputs 2014 to 2021

As training experience increases it becomes more challenging to induce further neuromuscular adaptation. Consequently, strength trainers seek alternative training methods in order to further increase strength and muscle mass. One method is to utilize accentuated eccentric loading, which applies a greater external load during the eccentric phase of the lift as compared to the concentric phase. Based upon this practice, the purpose of this study was to determine the effects of 10 weeks of accentuated eccentric loading vs. traditional isoinertial resistance training in strength-trained men. Young (22 ± 3 years, 177 ± 6 cm, 76 ± 10 kg, n = …