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Specialty: Sports Medicine
Source: Journal of Strength and Conditioning Research
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Total 39 results found since Jan 2013.
Validity of Bioelectric Impedance in Relation to Dual-Energy X-Ray Absorptiometry for Measuring Baseline and Change in Body Composition After an Exercise Program in Stroke
Vanzella, LM, Lawand, R, Shuaib, M, Oh, P, Corbett, D, and Marzolini, S. Validity of bioelectric impedance in relation to dual-energy x-ray absorptiometry for measuring baseline and change in body composition after an exercise program in stroke. J Strength Cond Res 36(12): 3273–3279, 2022—Exercise is an important strategy to improve fat-free mass (FFM) and reduce percent fat mass (FM%). However, no study has reported on a valid, cost-effective method to measure changes in body composition after stroke. The purpose of the study is to determine the level of agreement between bioelectrical impedance analysis (BIA) and dua...
Source: Journal of Strength and Conditioning Research - November 26, 2022 Category: Sports Medicine Tags: Original Research Source Type: research
Wearing Compression Garment Enhances Central Hemodynamics? A Systematic Review and Meta-Analysis
Lee, DCW, Ali, A, Sheridan, S, Chan, DKC, and Wong, SHS. Wearing compression garment enhances central hemodynamics? a systematic review and meta-analysis. J Strength Cond Res 36(8): 2349–2359, 2022—Compression garments (CG) are believed to enhance exercise performance and recovery by improving central hemodynamic responses. However, evidence is inconclusive. We performed a systematic review and meta-analysis to determine the effect of wearing CG at rest or after a physiological challenge on central hemodynamic responses, including cardiac output, stroke volume (SV), heart rate (HR), systolic blood pressure, diastolic b...
Source: Journal of Strength and Conditioning Research - August 1, 2022 Category: Sports Medicine Tags: Brief Review Source Type: research
Spinal and Pelvic Kinematics During Prolonged Rowing on an Ergometer vs. Indoor Tank Rowing
Trompeter, K, Weerts, J, Fett, D, Firouzabadi, A, Heinrich, K, Schmidt, H, Brüggemann, GP, and Platen, P. Spinal and pelvic kinematics during prolonged rowing on an ergometer vs. indoor tank rowing. J Strength Cond Res 35(9): 2622–2628, 2021—This investigation aimed to compare spinopelvic kinematics during rowing on an ergometer vs. in a rowing tank and to evaluate changes with progressing fatigue. Spinal and pelvic kinematics of 8 competitive scull rowers (19.0 ± 2.1 years, 179.9 ± 7.6 cm, and 74.8 ± 8.1 kg) were collected during 1 hour of rowing on an ergometer and in a rowing tank using a routine training protoc...
Source: Journal of Strength and Conditioning Research - September 1, 2021 Category: Sports Medicine Tags: Original Research Source Type: research
Effects of Time of Day on Race Splits, Kinematics, and Blood Lactate During a 50-m Front Crawl Performance
This study aimed to investigate the performance, race splits, metabolic, and stroke parameters during 2 successive 50-m front crawl under conditions simulating a competition. Eleven competitive male swimmers (20 ± 3 years, 182 ± 5 cm, and 77 ± 5 kg) performed 2 successive 50-m front crawl trials in a 50-m swimming pool at 10 am and 5 pm. Block time (tB), 15-m performance (t.15-m), and 50-m performance (t.50-m) were measured. Velocity (V), stroke rate (SR), stroke length (SL), and stroke index (SI) were measured at 3 time points during the trials. Pre-trial and post-trial blood samples were taken to determine blood lacta...
Source: Journal of Strength and Conditioning Research - February 26, 2021 Category: Sports Medicine Tags: Original Research Source Type: research
Energetics of Swimming With Hand Paddles of Different Surface Areas
Crocker, GH, Moon, JF, Nessler, JA, and Newcomer, SC. Energetics of swimming with hand paddles of different surface areas. J Strength Cond Res 35(1): 205–211, 2021—Hand paddles are one of the most common training aids used by the competitive swimmer, yet little is known regarding how hand paddle surface area affects the metabolic cost of transport (COT) while swimming. The purpose of this study was to determine how altering hand paddle size affects energy use during submaximal, front-crawl (i.e., freestyle) swimming. Twenty-six proficient, adult swimmers (13 men and 13 women) completed six 3-minute trials in a flume at...
Source: Journal of Strength and Conditioning Research - December 24, 2020 Category: Sports Medicine Tags: Original Research Source Type: research
Pacing During 200-m Competitive Masters Swimming
This study aimed to examine masters athletes pacing strategies categorized by stroke, gender, age, and performance level. Data were retrieved from World and European masters swimming championships and contained data for 4,272 performances. Performances were coded for stroke, gender, age, and performance classification (PC). Performance classification was based on comparison to the appropriate masters world record. Performances were then normalized, with split times being expressed as a percentage faster or slower than average 50-m split time to determine relative pace. Coefficient of variation (CV) of 50-m time was examine...
Source: Journal of Strength and Conditioning Research - June 25, 2020 Category: Sports Medicine Tags: Original Research Source Type: research
Kinematic Differences in Shoulder Roll and Hip Roll at Different Front Crawl Speeds in National Level Swimmers
This study aimed to quantify the range and velocity of hip roll, shoulder roll, and torso twist (produced by differences in the relative angle between shoulder roll and hip roll) in front crawl at different swimming speeds. Longitudinal torso kinematics was compared between sprint and 400-m pace front crawl using 3D kinematics of 13 elite Scottish front crawl specialists. The range (sprint: 78.1°; 400 m: 61.3°) and velocity of torso twist (sprint: 166.3°·s−1; 400 m: 96.9°·s−1) were greater at sprint than 400-m pace. These differences were attributed to reductions in hip roll (sprint: 36.8°; 400 m: 49.9°) withou...
Source: Journal of Strength and Conditioning Research - December 28, 2019 Category: Sports Medicine Tags: Original Research Source Type: research
Recovery Time Profiling After Short-, Middle- and Long-Distance Swimming Performance
Piras, A, Cortesi, M, Campa, F, Perazzolo, M, and Gatta, G. Recovery time profiling after short-, middle- and long-distance swimming performance. J Strength Cond Res 33(5): 1408–1415, 2019—We investigated cardiac autonomic responses and hemodynamic parameters on recovery time after short-, middle- and long-swimming performance. Ten male regional-level swimmers were tested to estimate time and frequency domains of arterial baroreflex sensitivity (BRS) and heart rate variability after 100, 200, and 400 m of front crawl. We found a BRS reduction for 90 minutes after a maximal 100- and 200-m front crawl event, meanwhile th...
Source: Journal of Strength and Conditioning Research - May 1, 2019 Category: Sports Medicine Tags: Original Research Source Type: research
Electromyographic Analysis of the Surf Paddling Stroke Across Multiple Intensities
Nessler, JA, Ponce-Gonzalez, JG, Robles-Rodriguez, C, Furr, H, Warner, M, and Newcomer, SC. Electromyographic analysis of the surf paddling stroke across multiple intensities. J Strength Cond Res 33(4): 1102–1110, 2019—Surfers spend a majority of their time in the water paddling. The purpose of this study was to examine activity in 5 muscles that contribute to paddling at different velocities and to characterize oxygen use, paddling cadence, and surfboard motion at each velocity. Twelve recreational surfers completed an incremental paddling test on a short surfboard in a swim flume. Surface electromyography was recorde...
Source: Journal of Strength and Conditioning Research - March 29, 2019 Category: Sports Medicine Tags: Original Research Source Type: research
Comparison of Incremental Intermittent and Time Trial Testing in Age-Group Swimmers
Zacca, R, Azevedo, R, Peterson Silveira, R, Vilas-Boas, JP, Pyne, DB, Castro, FAdS, and Fernandes, RJ. Comparison of incremental intermittent and time trial testing in age-group swimmers. J Strength Cond Res 33(3): 801–810, 2019—The aim of this study was to compare physiological and biomechanical characteristics between an incremental intermittent test and a time trial protocol in age-group swimmers. Eleven national level age-group swimmers (6 men and 5 women) performed a 7 × 200-m incremental intermittent protocol (until exhaustion; 30-second rest) and a 400-m test (T400) in front crawl on separate days. Cardiorespir...
Source: Journal of Strength and Conditioning Research - February 21, 2019 Category: Sports Medicine Tags: Original Research Source Type: research
Effect of an 11-Week In-Water Training Program With Increased Resistance on the Swimming Performance and the Basic Kinematic Characteristics of the Front Crawl Stroke
Gourgoulis, V, Valkoumas, I, Boli, A, Aggeloussis, N, and Antoniou, P. Effect of an 11-week in-water training program with increased resistance on the swimming performance and the basic kinematic characteristics of the front crawl stroke. J Strength Cond Res 33(1): 95–103, 2019—The purpose of the study was to assess the effect of an 11-week in-water training program with increased resistance on the swimming performance and the basic kinematic characteristics of the front crawl stroke in young female swimmers. Twelve swimmers were matched in pairs according to their best performance in 50-m front crawl swimming and then...
Source: Journal of Strength and Conditioning Research - December 19, 2018 Category: Sports Medicine Tags: Original Research Source Type: research
The Effects of a Cycling Warm-up Including High-Intensity Heavy-Resistance Conditioning Contractions on Subsequent 4-km Time Trial Performance
Chorley, A and Lamb, KL. The effects of a cycling warm-up including high-intensity heavy-resistance conditioning contractions on subsequent 4-km time trial performance. J Strength Cond Res 33(1): 57–65, 2019—Previous exercise has been shown to improve subsequent performance through different mechanisms. Sport-specific conditioning contractions can be used to exploit the “post-activation potentiation” (PAP) phenomenon to enhance performance although this has rarely been investigated in short endurance events. The aim of this study was to compare a cycling warm-up with PAP-inducing conditioning contractions (CW) with...
Source: Journal of Strength and Conditioning Research - December 19, 2018 Category: Sports Medicine Tags: Original Research Source Type: research
Effect of Energy Drink Consumption on Power and Velocity of Selected Sport Performance Activities
Jacobson, BH, Hester, GM, Palmer, TB, Williams, K, Pope, ZK, Sellers, JH, Conchola, EC, Woolsey, C, and Estrada, C. Effect of energy drink consumption on power and velocity of selected sport performance activities. J Strength Cond Res 32(6): 1613–1618, 2018—Energy drinks (ED) comprise a multibillion dollar market focused on younger, active, and competitive individuals. Marketing includes claims of improved alertness and performance. The purpose of this study was to assess power (W) and velocity (m·s−1) of a simulated, isolated forehand stroke (FHS), and a countermovement vertical jump (CVJ) before and after ingestio...
Source: Journal of Strength and Conditioning Research - May 23, 2018 Category: Sports Medicine Tags: Original Research Source Type: research
Walking Speed, Risk Factors, and Cardiovascular Events in Older Adults—Systematic Review
We examined the associations of WS measures with markers of cardiovascular risk and with cardiovascular events in noninstitutionalized subjects older than 60 years. A systematic review of observational studies was conducted using MEDLINE and SCOPUS from inception of the databases to December 2014, aiming at studies that evaluated WS as the primary outcome (usual or maximal pace) within a distance ≤20 m associated with cardiovascular health. All 15 included studies (29,845 subjects) reported significant associations of WS with different cardiovascular risk factors (coronary artery calcification, C-reactive protein, hypert...
Source: Journal of Strength and Conditioning Research - October 26, 2017 Category: Sports Medicine Tags: Brief Review Source Type: research
Warm-up for Sprint Swimming: Race-Pace or Aerobic Stimulation? A Randomized Study
Abstract: Neiva, HP, Marques, MC, Barbosa, TM, Izquierdo, M, Viana, JL, Teixeira, AM, and Marinho, DA. Warm-up for sprint swimming: race-pace or aerobic stimulation? A randomized study. J Strength Cond Res 31(9): 2423–2431, 2017—The aim of this study was to compare the effects of 2 different warm-up intensities on 100-m swimming performance in a randomized controlled trial. Thirteen competitive swimmers performed two 100-m freestyle time-trials on separate days after either control or experimental warm-up in a randomized design. The control warm-up included a typical race-pace set (4 × 25 m), whereas the experimental ...
Source: Journal of Strength and Conditioning Research - August 26, 2017 Category: Sports Medicine Tags: Original Research Source Type: research
