Dustin J. Oranchuk

Morpho (United States)

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John Cronin

Auckland University of Technology

Gustavo Ribeiro da Mota

Universidade Federal do Triângulo Mineiro

Adam G. Storey

Auckland University of Technology

Moacir Marocolo

Universidade Federal de Juiz de Fora

André R. Nelson

Victoria University

Bernardo Neme Ide

Universidade Federal do Triângulo Mineiro

Amanda Piaia Silvatti

Universidade Federal de Viçosa

Shelley Diewald

Auckland University of Technology

Bruno Victor Corrêa da Silva

Centro Universitário de Belo Horizonte

T. L. Robinson

Adams State University

Cooperative Institutions

Auckland University of Technology

University of Calgary

Manouba University

Universidade Federal do Triângulo Mineiro

Universidade Federal de Juiz de Fora

University of Colorado System

Seattle University

Victoria School of Management

Victoria University

University of Auckland

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Superficial heat administration and foam rolling increase hamstring flexibility acutely; with amplifying effects

Physical Therapy in Sport (2019)

Dustin J. Oranchuk Matthew R. Flattery T. L. Robinson

10.1016/j.ptsp.2019.10.004

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Citations (17)

The Validity of a Portable Strain-Gauge Apparatus Versus a Commercial Isokinetic Dynamometer for Evaluating Knee Extension Kinetics

International Journal of Sports Physical Therapy (2024)

Dustin J. Oranchuk Chris Juneau Shelley Diewald Jono Neville John Cronin

Isokinetic dynamometers are widely used when assessing neuromuscular function including knee extension kinetics. However, these dynamometers are often prohibitively expensive and are not portable. Thus strain-gauge technology has grown in popularity.

Dynamometer

Strain gauge

10.26603/001c.92742

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Citations (3)

relationship of anthropometric and physical performance characteristics on competitive success in amateur, elite, and professional rodeo athletes

Dustin J. Oranchuk LeeAnne Gullet Michael Kicia Brandon Thome Alex Game

Elite

Elite Athletes

Professional sport

Competitive athletes

Competitive sport

10.51224/srxiv.148

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Citations (0)

Comparison of the Hang High Pull and Loaded Jump Squat for the Development of Vertical Jump and Isometric Force-Time Characteristics

The Journal of Strength and Conditioning Research (2017)

Dustin J. Oranchuk T. L. Robinson Zachary J. Switaj Eric J. Drinkwater

Oranchuk, DJ, Robinson, TL, Switaj, ZJ, and Drinkwater, EJ. Comparison of the hang high pull and loaded jump squat for the development of vertical jump and isometric force-time characteristics. J Strength Cond Res 33(1): 17-24, 2019-Weightlifting movements have high skill demands and require expert coaching. Loaded jumps have a comparably lower skill demand but may be similarly effective for improving explosive performance. The purpose of this study was to compare vertical jump performance, isometric force, and rate of force development (RFD) after a 10-week intervention using the hang high pull (hang-pull) or trap-bar jump squat (jump-squat). Eighteen National Collegiate Athletic Association Division II swimmers (8 males, 10 females) with at least 1 year of resistance training experience volunteered to participate. Testing included the squat jump (SJ), countermovement jump, and the isometric midthigh pull (IMTP). Vertical ground reaction forces were analyzed to obtain jump height and relative peak power. Relative peak force, peak RFD, and relative force at 5 time bands were obtained from the IMTP. Subjects were randomly assigned to either a hang pull (n = 9) or jump-squat (n = 9) training group and completed a 10-week, volume-equated, periodized training program. Although there was a significant main effect of training for both groups, no statistically significant between-group differences were found (p ≥ 0.17) for any of the dependent variables. However, medium effect sizes in favor of the jump-squat training group were seen in SJ height (d = 0.56) and SJ peak power (d = 0.69). Loaded jumps seem equally effective as weightlifting derivatives for improving lower-body power in experienced athletes. Because loaded jumps require less skill and less coaching expertise than weightlifting, loaded jumps should be considered where coaching complex movements is difficult.

Squat

Vertical jump

Ground reaction force

10.1519/jsc.0000000000001941

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Citations (34)

The effect of regional quadriceps anatomical parameters on angle-specific isometric torque expression

Applied Physiology Nutrition and Metabolism (2020)

Dustin J. Oranchuk Will G. Hopkins André R. Nelson Adam G. Storey John Cronin

The length-tension relationship affects knee extension performance; however, whether anatomical variations in different quadriceps regions affect this relationship is unknown. Regional (proximal, middle, distal) quadriceps thickness (MT), pennation angle, and fascicle length of 24 males (48 limbs) were assessed via ultrasonography. Participants also performed maximal voluntary isometric torque (MVIT) assessments at 40°, 70°, and 100° of knee flexion. Measures were recorded on 3 separate occasions. Linear regression models predicting angle-specific torque from regional anatomy provided adjusted simple and multiple correlations (√adjR2) with bootstrapped compatibility limits to assess magnitude. Middle vastus lateralis MT and MVIT at 100° (√adjR2 = 0.64) was the largest single correlation, with distal vastus lateralis MT having the greatest mean correlations regardless of angle (√adjR2 = 0.61 ± 0.05, mean ± SD). Lateral distal MT and architecture had larger (Δ√adjR2 = 0.01 to 0.43) single and multiple correlations with MVIT than the lateral proximal (√adjR2 = 0.15 to 0.69 vs -0.08 to 0.65). Conversely, middle anterior MT had greater (Δ√adjR2 = 0.08 to 0.38) single and multiple correlations than proximal MT (√adjR2 = 0.09 to 0.49 vs -0.21 to 0.14). The length-tension relationship was trivially affected by regional quadriceps architecture. The middle and distal quadriceps were the strongest predictors of MVIT at all joint angles. Therefore, researchers may wish to focus on middle and distal lateral quadriceps anatomy when performing ultrasonographic evaluations. Novelty: The length-tension relationship is minimally affected by regional quadriceps anatomical parameters. Middle and distal vastus lateralis and lateral vastus intermedius anatomy were consistently the best predictors of torque. Practitioners may focus their assessments on the middle and distal regions of the lateral quadriceps' musculature.

Muscle architecture

Fascicle

Quadriceps muscle

Vastus lateralis muscle

10.1139/apnm-2020-0565

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Citations (10)

The effects of regional quadriceps architecture on angle-specific rapid force expression

Applied Physiology Nutrition and Metabolism (2023)

Dustin J. Oranchuk Will G. Hopkins John Cronin Adam G. Storey André R. Nelson

Evaluating anatomical contributions to performance can increase understanding of muscle mechanics and guide physical preparation. While the impact of anatomy on muscular performance is well studied, the effects of regional quadriceps architecture on rapid torque or force expression are less clear. Regional (proximal, middle, and distal) quadriceps (vastus lateralis, rectus femoris, and vastus intermedius) thickness (MT), pennation angle (PA), and fascicle length (FL) of 24 males (48 limbs) were assessed via ultrasonography. Participants performed maximal isometric knee extensions at 40°, 70°, and 100° of knee flexion to evaluate rate of force development from 0 to 200 ms (RFD0-200). Measurements were repeated on three occasions with the greatest RFD0-200 and mean muscle architecture measures used for analysis. Linear regression models predicting angle-specific RFD0-200 from regional anatomy provided adjusted correlations (√adjR2) with bootstrapped compatibility limits. Mid-rectus femoris MT (√adjR2 = 0.41-0.51) and proximal vastus lateralis FL (√adjR2 = 0.42-0.48) were the best single predictors of RFD0-200, and the only measures to reach precision with 99% compatibility limits. Small simple correlations were found across all regions and joint angles between RFD0-200 and vastus lateralis MT (√adjR2 = 0.28 ± 0.13; mean ± SD), vastus lateralis FL (√adjR2 = 0.33 ± 0.10), rectus femoris MT (√adjR2 = 0.38 ± 0.10), and lateral vastus intermedius MT (√adjR2 = 0.24 ± 0.10). Between-correlation comparisons are reported within the article. Researchers should measure mid-region rectus femoris MT and vastus lateralis FL to efficiently and robustly evaluate potential anatomical contributions to rapid knee extension force changes, with distal and proximal measurements providing little additional value. However, correlations were generally small to moderate, suggesting that neurological factors may be critical in rapid force expression.

Muscle architecture

Vastus lateralis muscle

Rectus femoris muscle

Quadriceps muscle

10.1139/apnm-2023-0074

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Citations (1)

Is There Any Non-functional Training? A Conceptual Review

Bernardo Neme Ide Amanda Piaia Silvatti Moacir Marocolo Clarcson Plácido Conceição dos Santos Bruno Victor Corrêa da Silva

This conceptual review aimed to investigate whether "functional training" (FT) programs are different from traditional strength, power, flexibility, and endurance training programs. A search for the twenty most recent papers published involving FT was performed in the PubMed/Medline database. Definition, concepts, benefits, and the exercises employed in FT programs were analyzed. The main results were: 1) there is no agreement about a universal definition for FT; 2) FT programs aim at developing the same benefits already induced by traditional strength, power, flexibility, and endurance training programs; 3) exercises employed are also the same. The inability to define FT makes differentiation difficult. Physical training programs can be easily described and classified as strength, power, flexibility, endurance, and the specific exercises employed (e.g., traditional resistance training, ballistic exercises, plyometrics and Olympic-style weightlifting, continuous and high-intensity interval training). This proper description and classification may improve communication in sports science and improve interdisciplinary integration. Aiming to avoid confusion and misconceptions, and based on the current evidence, we recommend that the terms FT, high-intensity FT, and functional fitness training no longer describe any physical training program.

Confusion

Plyometrics

Strength Training

10.20944/preprints202110.0426.v1

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Citations (1)

Commentary: “You're Only as Strong as Your Weakest Link”: A Current Opinion About the Concepts and Characteristics of Functional Training

Frontiers in Physiology (2021)

Bernardo Neme Ide Moacir Marocolo Clarcson Plácido Conceição dos Santos Bruno Victor Corrêa da Silva Amanda Piaia Silvatti

GENERAL COMMENTARY article Front. Physiol., 04 November 2021Sec. Exercise Physiology https://doi.org/10.3389/fphys.2021.744144

Link (geometry)

10.3389/fphys.2021.744144

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Citations (7)

Kinetic and kinematic profile of eccentric quasi-isometric loading

Sports Biomechanics (2021)

Dustin J. Oranchuk Shelley Diewald Joseph W. McGrath André R. Nelson Adam G. Storey

Eccentric quasi-isometric (EQI) contractions (maintaining a yielding contraction for as long as possible, beyond task failure) have gained interest in research and applied settings. However, little is known regarding the biomechanical profile of EQIs. Fourteen well-trained males performed four maximal effort knee-extensor EQIs, separated by 180 seconds. Angular impulse, velocity, and time-under-tension through the 30–100º range of motion (ROM), and in eight ROM brackets were quantified. Statistical parametric mapping, analyses of variance, and standardised effects (Hedges' g (ES), %Δ) detected between-contraction joint-angle-specific differences in time-normalised and absolute variables. Mean velocity was 1.34º·s−1 with most (62.5 ± 4.9%) of the angular impulse imparted between 40–70º. Most between-contraction changes occurred between 30–50º (p≤ 0.067, ES = 0.53 ± 0.31, 60 ± 52%), while measures remained constant between 50–100º (= 0.069–0.83, ES = 0.10 ± 0.26, 14.3 ± 24.6%). EQIs are a time-efficient means to impart high cumulative mechanical tension, especially at short to medium muscle lengths. However, angular impulse distribution shifts towards medium to long muscle lengths with repeat contractions. Practitioners may utilise EQIs to emphasize the initial portion of the ROM, and limit ROM, or apply EQIs in a fatigued state to emphasize longer muscle lengths.

10.1080/14763141.2021.1890198

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Videographic Variability of Triple and Quintuple Horizontal Hop Performance

Journal of Sport Rehabilitation (2024)

Anthony P. Sharp Jonathon Neville Shelley Diewald Dustin J. Oranchuk John Cronin

Context : Horizontal hops can provide insight into how athletes can tolerate high-intensity single-leg stretch loads and are commonly used in athlete monitoring and injury management. Variables like flight, contact, and total time provide valuable diagnostic information to sports science professionals. However, gold-standard assessment tools (eg, 3-dimensional motion capture, force plates) require monetary and technological resources. Therefore, we used a tablet and free software to determine the between-rater, within-rater, and test–retest variability of the temporal events of multiple horizontal hop tests. Design : Reliability study. Methods : Nine healthy males (20.8 [1.3] y, 71.4 [9.8] kg, 171.7 [4.5] cm) across various university sports teams and clubs volunteered and performed several triple (3-Hop) and quintuple (5-Hop) horizontal hops over 3 testing sessions. Six raters detected temporal events from video to determine between-rater variability, while a single rater quantified within-session and test–retest variability. The temporal variables of flight time, ground contact time for each individual hop, and the total time of each hoping series were determined. The consistency of measures was interpreted using the coefficient of variation and interclass correlation coefficients (ICC). Results : Good to excellent between-rater consistency was observed for all hops (ICC = .85–1.00). Absolute (coefficient of variation ≤ 2.0%) and relative consistency (ICC = .98–1.00) was excellent. Test–retest variability showed acceptable levels of absolute consistency (coefficient of variation ≤ 8.7%) and good to excellent consistency in 10/16 variables (ICC = .81–.93), especially those later in the hopping cycle. Conclusions : A tablet and free digitizing software are reliable in detecting temporal events during multiple horizontal hops, which could have exciting implications for power diagnostics and return-to-play decisions. Therefore, rehabilitation and performance professionals can confidently utilize the highly accessible equipment from this study to track multiple hop performances.

Coefficient of variation

10.1123/jsr.2023-0245

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Citations (1)