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Full-Text Articles in Life Sciences
The Predictability Of Peak Oxygen Consumption Using Submaximal Ratings Of Perceived Exertion In Adolescents, Danilo V. Tolusso, Ward C. Dobbs, Michael Esco
The Predictability Of Peak Oxygen Consumption Using Submaximal Ratings Of Perceived Exertion In Adolescents, Danilo V. Tolusso, Ward C. Dobbs, Michael Esco
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 1173-1183, 2018. Rating of perceived exertion (RPE) extrapolation involves mathematically extending the submaximal relationship between RPE and oxygen consumption (VO2) to maximal intensity. This technique allows practitioners to forego, potentially dangerous, maximal exertion testing while attaining accurate measures of maximal oxygen consumption used for exercise prescription. This method has been proven accurate in adults, but much less in known when applied to an adolescent population. The purpose of this study was to assess the accuracy of the RPE extrapolation as method for estimating VO2max in adolescents. Twenty-two healthy, asymptomatic adolescents performed …
Foot-To-Foot Bioelectrical Impedance, Air Displacement Plethysmography, And Dual Energy X-Ray Absorptiometry In Resistance-Trained Men And Women, Justin Merrigan, Sina Gallo Phd, Jennifer Fields, Margaret T. Jones Phd
Foot-To-Foot Bioelectrical Impedance, Air Displacement Plethysmography, And Dual Energy X-Ray Absorptiometry In Resistance-Trained Men And Women, Justin Merrigan, Sina Gallo Phd, Jennifer Fields, Margaret T. Jones Phd
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 1145-1155, 2018. Accurate assessment of body composition is important to athletic performance goal setting and nutritional program design. Dual-energy x-ray absorptiometry (DXA) is considered the “gold standard” in body composition assessment, yet the cost renders DXA unfeasible for many. Therefore, it is of interest to compare other body composition assessment methods to DXA in resistance-trained individuals whose focus is athletic performance. The purpose of the current study was to determine the agreement in estimates of body composition ((body fat (BF%); fat mass (FM); fat free mass (FFM)) by bioelectrical impedance analysis (BIA; Tanita SC-331S) …
Relationships Between Assessments In A Physical Ability Test For Law Enforcement: Is There Redundancy In Certain Assessments?, Karly Cesario, Joe Dulla, Ashley Blood Good, Matthew R. Moreno, J. Jay Dawes, Robert G. Lockie
Relationships Between Assessments In A Physical Ability Test For Law Enforcement: Is There Redundancy In Certain Assessments?, Karly Cesario, Joe Dulla, Ashley Blood Good, Matthew R. Moreno, J. Jay Dawes, Robert G. Lockie
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 1063-1073, 2018. The purpose of this study was to investigate the relationships between tests incorporated into a physical assessment battery (PAT) for a law enforcement (LEA) to determine if there were redundancies (i.e. tests measuring the same qualities). A retrospective analysis of 226 recruits (196 males, 30 females) was conducted. The PAT consisted of: maximal push-ups and sit-ups completed in 60 s; a 75-yard pursuit run (75PR); maximal revolutions completed on an arm ergometer in 60 s; and a 2.4 km run. A one-way ANOVA (p<0.05) determined if there were significant differences in the PAT data between the sexes. Pearson’s correlations (p<0.05) calculated relationships between each of the tests within the PAT, and males and females were analyzed separately. Further, tests that could potentially measure similar qualities, including upper-body endurance (push-ups/arm ergometer), abdominal endurance (push-ups/sit-ups), and aerobic fitness (arm ergometer/2.4 km run) were investigated further with one-sample t-tests to determine agreement. Males performed better than the females in all tests (p≤0.017). There were significant correlations …
Comparison Of Physical Activity During Zumba With A Human Or Video Game Instructor, Bridgette Schneekloth, Gregory A. Brown
Comparison Of Physical Activity During Zumba With A Human Or Video Game Instructor, Bridgette Schneekloth, Gregory A. Brown
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 1019-1030, 2018. Using a physically active video game presents an opportunity for a person to engage in exercise in the privacy of their own home, yet still receive some feedback on the quality of their exercise performance. The purpose of this project was to compare the physical activity between participating in a Zumba exercise class led by a human and using a Zumba video game. Eight women (33.0 ± 3.0 y, 34.8 ± 8.1 % body fat) who regularly participated in a Zumba exercise class were measured for heart rate, number of steps taken, …
Aerobic Fitness Is Of Greater Importance Than Strength And Power In The Load Carriage Performance Of Specialist Police, Jeremy Robinson, Adam Roberts, Shane Irving, Robin M. Orr
Aerobic Fitness Is Of Greater Importance Than Strength And Power In The Load Carriage Performance Of Specialist Police, Jeremy Robinson, Adam Roberts, Shane Irving, Robin M. Orr
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 987-998, 2018.Police officers are required to carry external loads as part of their occupation. One means of preparing officers to carry loads is through physical conditioning. The aim of this study was to investigate whether strength, power or aerobic endurance had the greatest association with load carriage performance. Retrospective data from 42 male specialist tactical police officers (mean body weight = 88.8±8.25 kg) informed this study. Baseline data were provided for strength (1 Repetition Maximum [RM] bench press, deadlift, squat and pull-up), lower body power (vertical jump, 10m sprint) and aerobic (‘beep’ test) …
Effect Of A Flying Versus Stationary Start On Wingate Test Outcomes Using An Electromagnetically-Braked Cycle Ergometer In Advanced Resistance-Trained Males, Nicolas W. Clark, Dale R. Wagner, Edward M. Heath
Effect Of A Flying Versus Stationary Start On Wingate Test Outcomes Using An Electromagnetically-Braked Cycle Ergometer In Advanced Resistance-Trained Males, Nicolas W. Clark, Dale R. Wagner, Edward M. Heath
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 980-986, 2018.The purpose of this study was to compare power outputs of the flying start to the stationary start method on an electromagnetically–braked cycle ergometer. Twenty advanced resistance-trained men (age 24.6 ± 4.5 years; 25.4 ± 2.5 kg/m2) volunteered to participate in this study. A counter-balanced, repeated-measures design was utilized to randomly assign participants to either the flying start or the stationary start for their first Wingate test. Paired ttests were used to evaluate mean differences between start methods. Peak power (PP), mean power (MP), total work (TW), peak cadence (PC), …
Musculoskeletal Flexibility And Quality Of Life: A Feasibility Study Of Homeless Young Adults In Los Angeles County, Marina A. Marmolejo, Makda Medhanie, Heather Tarleton
Musculoskeletal Flexibility And Quality Of Life: A Feasibility Study Of Homeless Young Adults In Los Angeles County, Marina A. Marmolejo, Makda Medhanie, Heather Tarleton
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 968-979, 2018. Proper musculoskeletal health is dependent on the efficient inner workings of muscles, tendons, ligaments, joints, and bones. The homeless experience can be physically debilitating to these tissues and anatomical structures. This feasibility study aims to explore how to answer the overarching question: do the lived experiences of homeless young adults negatively affect their musculoskeletal health? Questionnaires were distributed to assess the demographic characteristics, physical activity, health behaviors, and sleep patterns of 40 homeless young adults and 45 university students in Los Angeles County. Participants also completed supervised stretch tests to assess musculoskeletal …
Validity Of Critical Velocity Concept For Weighted Sprinting Performance, Nathan D. Dicks, Tammy V. Joe, Kyle J. Hackney, Robert W. Pettitt
Validity Of Critical Velocity Concept For Weighted Sprinting Performance, Nathan D. Dicks, Tammy V. Joe, Kyle J. Hackney, Robert W. Pettitt
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 900-909, 2018. We investigated the validity of a recently developed equation for predicting sprinting times of various tactical loads based upon the performance of a running 3-min all-out exercise test (3MT). Thirteen recreationally trained participants completed the running 3MT to determine critical velocity (CV) and finite running capacity for running velocities exceeding CV (D’). Two subsequent counterbalanced loaded sprints of 800 and 1000 m distances with 20 and 15% of their body mass, respectively, were evaluated. Estimated times (t, sec) for running 800 and 1000 m with a tactical load was derived …
Acute Cardiometabolic Responses To Medicine Ball Interval Training In Children, Avery D. Faigenbaum, Jie Kang, Nicholas A. Ratamess, Anne C. Farrell, Nicole Ellis, Ira Vought, Jill Bush
Acute Cardiometabolic Responses To Medicine Ball Interval Training In Children, Avery D. Faigenbaum, Jie Kang, Nicholas A. Ratamess, Anne C. Farrell, Nicole Ellis, Ira Vought, Jill Bush
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 886-899, 2018. Medicine ball interval training (MBIT) has been found to be an effective exercise modality in fitness programs, yet the acute physiological responses to this type of this exercise in youth are unknown. The purpose of this study was to examine the acute cardiometabolic responses to MBIT in children. Fourteen children (mean age 10.1 ± 1.3 yr) were tested for peak oxygen uptake (VO2peak) on a treadmill and subsequently (> 48 hours later) performed a progressive 10 min MBIT protocol of 5 exercises (EX): standing marches (EX1), alternating lunges (EX2), squat …
Pacing Of An Untrained 17-Year-Old Teenager In A Marathon Attempt, Beat Knechtle, Celina Knechtle, Thomas Rosemann, Pantelis Nikolaidis
Pacing Of An Untrained 17-Year-Old Teenager In A Marathon Attempt, Beat Knechtle, Celina Knechtle, Thomas Rosemann, Pantelis Nikolaidis
International Journal of Exercise Science
International Journal of Exercise Science 11(6): 856-866, 2018. Although there has been increased scientific interest for physiological responses to endurance running and pacing, limited information exists for adolescents participating in endurance events. We are reporting the case of an untrained 17-year-old female teenager (body mass 50.6 kg, height 167 cm and body mass index 18.1 kg/m2) who intended to run a marathon within 6 hours without preparation. The young woman missed her goal by just 2 km. When the average running speed per hour was analysed, there was a major effect of race hour on running speed (p …
The Impact Of An External Load Of Football Equipment On Dynamic Balance As Assessed By The Modified Star Excursion Balance Test, Thomas J. Denehy, Timothy F. Marshall, Kim Spaccarotella, Walter Andzel
The Impact Of An External Load Of Football Equipment On Dynamic Balance As Assessed By The Modified Star Excursion Balance Test, Thomas J. Denehy, Timothy F. Marshall, Kim Spaccarotella, Walter Andzel
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 797-805, 2018.Ankle sprains are common injuries, especially for football players, and may result in ankle instability, which can limit performance and increase injury risk. Ankle stability return to play criteria is often assessed under loaded conditions, even though previous research suggests loaded conditions affect dynamic balance. The purpose of this study was to evaluate dynamic balance under loaded conditions. A modified Star Excursion Balance Test (SEBT), incorporating anterior, posterior medial and posterior lateral reach directions under the loaded condition of NCAA Division III football equipment was evaluated. Thirty male collegiate football players completed …
Reliability And Validation Of The Hexoskin Wearable Bio-Collection Device During Walking Conditions, Jeffrey Montes, John C. Young, Richard D. Tandy, James W. Navalta
Reliability And Validation Of The Hexoskin Wearable Bio-Collection Device During Walking Conditions, Jeffrey Montes, John C. Young, Richard D. Tandy, James W. Navalta
International Journal of Exercise Science
International Journal of Exercise Science 11(7): 806-816, 2018. To evaluate if the Hexoskin smart shirt (HxS) would produce valid and reliable measurements for heart rate (HR), respiratory rate (RR), minute ventilation (VE), step count (SC), and energy expenditure (EE) when compared to a Polar T-31 heart rate monitor, an Applied Electrochemistry Moxus Metabolic System, and a manual step count. A two-day walking treadmill protocol with participants walking for 3 minutes at 3 speeds (1.5mph, 2.5mph, 3.5mph, 0% grade) was performed. Forty-nine volunteers participated the first day, forty-six on the second, thirty-one were used for reliability. Values calculated for …
Selecting The Best Of The Best: Associations Between Anthropometric And Fitness Assessment Results And Success In Police Specialist Selection, Robin (Rob) Marc Orr, Erin Caust, Benjamin Hinton, Rodney Pope
Selecting The Best Of The Best: Associations Between Anthropometric And Fitness Assessment Results And Success In Police Specialist Selection, Robin (Rob) Marc Orr, Erin Caust, Benjamin Hinton, Rodney Pope
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 785-796, 2018. To successfully complete specialist police selection, officers must be physically fit. The aim of this study was to investigate the relationship between performance on selected anthropometric and fitness tests and successful selection into a specialist police unit. Thirty-two male police officers (mean age = 29.48±4.99 years) participated in a Barrier Fitness Assessment (BFA), followed by a Specialist Selection Course (SSC). The BFA spanned two consecutive days of testing (pull-ups, push-ups, seven-stage sit-ups, a timed loaded pack march, a Multi-Stage Fitness Test, an agility run, a lift and carry task and a 300m …
A Preliminary Analysis Of The Relationship Between The Multistage Fitness Test And 300-M Run In Law Enforcement Officers: Implications For Fitness Assessment, Matthew R. Moreno, Robert G. Lockie, Charles L. Kornhauser, Ryan J. Holmes, J. Jay Dawes
A Preliminary Analysis Of The Relationship Between The Multistage Fitness Test And 300-M Run In Law Enforcement Officers: Implications For Fitness Assessment, Matthew R. Moreno, Robert G. Lockie, Charles L. Kornhauser, Ryan J. Holmes, J. Jay Dawes
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 730-738, 2018. Law enforcement agencies (LEAs) often use fitness tests to assess recruits and incumbents. One fitness test that is gaining popularity is the 20-meter multistage fitness test (20m-MSFT). However, the potential length of this assessment, in addition to the repeated direction changes, means this test may not be appropriate for all officers (e.g. older officers, or those with physical impairments). The 300-m run is shorter, features no direction changes, and could provide an indication of fitness. The study purpose was to investigate the relationship between the 20m-MSFT and 300–m run. Retrospective analysis of …
A Two-Test Protocol For The Precise Determination Of The Maximal Lactate Steady State, Daniel Yaeger, Jena Winger, Kristin Murphy, Stasinos Stavrianeas
A Two-Test Protocol For The Precise Determination Of The Maximal Lactate Steady State, Daniel Yaeger, Jena Winger, Kristin Murphy, Stasinos Stavrianeas
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 681-695, 2018. The purpose of this study was to determine the efficacy of a two-test method for precisely identifying the Maximal Lactate Steady State (MLSS). Eight male competitive cyclists performed two bouts on a cycle ergometer. Following a maximal oxygen consumption (O2max) test (66.91 ± 5.29 mL∙kg-1∙min-1) we identified the lactate deflection point using the visual deflection (TVis), Log-Log (TLog), Dmax (TDmax), RER = 1.00 (TRER), ventilatory threshold (TVent), and the 1.0 mmol·L-1 increase above baseline …
The Effect Of The Menstrual Cycle On The Reliability Of Contact-Electrode Bioelectrical Impedance Analyzers, Emily A. Cumberledge, Cassandra Myers, Jennifer J. Venditti, Curt B. Dixon, Joseph L. Andreacci
The Effect Of The Menstrual Cycle On The Reliability Of Contact-Electrode Bioelectrical Impedance Analyzers, Emily A. Cumberledge, Cassandra Myers, Jennifer J. Venditti, Curt B. Dixon, Joseph L. Andreacci
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 625-632, 2018. Bioelectrical impedance analysis (BIA) is a noninvasive and relatively inexpensive method of assessing body composition. Manufacturers of BIA technology recommend to avoid testing women when they perceive to be retaining water during the menstrual cycle. The purpose of the present investigation was to examine the effect of the menstrual cycle on body composition determined by contact-electrode BIA analyzers. Forty-three college-aged women volunteered to participate in this study (age=21.2 ± 1.1 years; body mass index = 24.0 ± 3.7 kg/m2). Subjects had their body composition assessed using four different contact-electrode BIA …
Examination Of Resistance Settings Based On Body Weight For The 3-Minute All-Out Critical Power Test, Marlene J. Schulte, Jody L. Clasey, Bradley S. Fleenor, Haley C. Bergstrom
Examination Of Resistance Settings Based On Body Weight For The 3-Minute All-Out Critical Power Test, Marlene J. Schulte, Jody L. Clasey, Bradley S. Fleenor, Haley C. Bergstrom
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 585-597, 2018. There are conflicting suggestions regarding the most valid resistance (3-5% of body weight) to use for the critical power (CP) 3-min all-out (CP3min) test to estimate CP and anaerobic work capacity (AWC). The purpose of this study was to determine if the CP and AWC estimates from the CP3min test were affected by the percentage of body weight used to set the resistance on a Monark cycle ergometer. Ten recreationally trained participants (mean ± SD: Age: 22.2 ± 2.2 yrs.) completed the CP3min test at resistances of 4.5% …
Congruent Accuracy Of Wrist-Worn Activity Trackers During Controlled And Free-Living Conditions, Christopher J. Dondzila, Colleen Lewis, Justin R. Lopez, Tonya Parker
Congruent Accuracy Of Wrist-Worn Activity Trackers During Controlled And Free-Living Conditions, Christopher J. Dondzila, Colleen Lewis, Justin R. Lopez, Tonya Parker
International Journal of Exercise Science
International Journal of Exercise Science 11(7): 575-584, 2018. To examine activity tracker accuracy for measuring steps, energy expenditure, and heart rate in controlled and free-living conditions. Forty participants performed four, five-minute stages (walking: 53.7 m∙min-1, 80.5 m∙min-1; running: 134.1 m∙min-1, 160.9 m∙min-1) while wearing the Fitbit Charge HR (FB) and the Mio FUSE (MF) activity trackers. Measurements included steps, energy expenditure (kcals), and heart rate (beats∙min-1). In addition to the FB and MF, participants wore the NL-1000 (NL) activity tracker during waking hours of the subsequent day. One way ANOVAs with Tukey’s post hoc analyses were performed to compare mean …
Validation Of The Piezorx® Step Count And Moderate To Vigorous Physical Activity Times In Free Living Conditions In Adults: A Pilot Study, Myles W. O'Brien, William R. Wojcik, Lisette D' Entremont, Jonathon R. Fowles
Validation Of The Piezorx® Step Count And Moderate To Vigorous Physical Activity Times In Free Living Conditions In Adults: A Pilot Study, Myles W. O'Brien, William R. Wojcik, Lisette D' Entremont, Jonathon R. Fowles
International Journal of Exercise Science
International Journal of Exercise Science 11(7): 541-551, 2018. The purpose of the study was to: 1) Validate the PiezoRx® for steps and intensity related physical activity in free-living conditions compared to the criterion measure. 2) Compare PiezoRx®’s steps and intensity related physical activity to physiological assessments. 3) To assess the utility of the PiezoRx® in a subsample of participants. Thirty-nine participants consisting of 28 females aged 54.9±10.6 (33-74) years and 11 males aged 63.9±10.9 (44-80) years wore the PiezoRx® physical activity monitor and the ActiGraph® accelerometer for one full week and completed a physical assessment. A subsample (n=24) wore the …
The Accuracy And Validity Of Ios-Based Heart Rate Apps During Moderate To High Intensity Exercise, Alexa M. Bouts, Lauren Brackman, Elizabeth Martin, Adam M. Subasic, Edward S. Potkanowicz
The Accuracy And Validity Of Ios-Based Heart Rate Apps During Moderate To High Intensity Exercise, Alexa M. Bouts, Lauren Brackman, Elizabeth Martin, Adam M. Subasic, Edward S. Potkanowicz
International Journal of Exercise Science
International Journal of Exercise Science 11(7): 533-540, 2018. People use their smartphones for everything from web browsing to tracking fitness metrics. However, it is unclear whether smartphone-based apps that use photoplethysmography to measure heart rate are an accurate or valid measure of exercise intensity. Purpose was to determine the accuracy and validity of two iOS-based heart rate monitors, Runtastic Heart Rate Monitor and Pulse Tracker PRO by Runtastic (Runtastic) and Instant Heart Rate+: Heart Rate and Pulse Monitor by Azumio (Instant Heart Rate), when compared to the electrocardiogram (ECG) and Polar® T31 uncoded heart rate monitor from moderate to vigorous …
Comparison Of Techniques For Tracking Body Composition Changes Across A Basketball Season, Ashley Ploudre, Jerry Mayhew
Comparison Of Techniques For Tracking Body Composition Changes Across A Basketball Season, Ashley Ploudre, Jerry Mayhew
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 425-438, 2018. Body composition assessment has become an integral part of athletes’ training schedules. Questions remain concerning the accuracy of various methods to track body composition changes over a competitive year cycle. The purpose of this study was to compare various methods of tracking body composition across a college women’s basketball season. Fourteen Division II women (age = 20.1 ± 1.2 y) were measured prior to the season (T1), after pre-season conditioning (T2), at mid-season (T3), and at the end of the season (T4) using skinfolds (SKF), two bioelectric impedance analysis (BIA) devices, and …
Comparison Of Body Composition Measurements In Lean Female Athletes, Carly L. Houska, Jessica D. Kemp, Jamal S. Niles, Amy Morgan, Robin M. Tucker, Mary-Jon Ludy
Comparison Of Body Composition Measurements In Lean Female Athletes, Carly L. Houska, Jessica D. Kemp, Jamal S. Niles, Amy Morgan, Robin M. Tucker, Mary-Jon Ludy
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 417-424, 2018. This study compared body composition measurements in lean female athletes. The primary objective was to compare the accuracy of percent body fat (%BF) determined by bioelectrical impedance analysis (BIA), air-displacement plethysmography (ADP), and underwater weighing (UWW) in female Division I cheerleaders (n = 10 bases, 6 back-spots, and 12 flyers) from two universities. The secondary objective was to compare health risk predicted by %BF to body mass index (BMI) categorizations. UWW was considered the gold standard for assessing %BF. Pearson correlation coefficients were used to determine associations between methods. Repeated measures …
Association Between Different Non-Invasively Derived Thresholds With Lactate Threshold During Graded Incremental Exercise., Conor J. Raleigh, Bernard Donne, Neil Fleming
Association Between Different Non-Invasively Derived Thresholds With Lactate Threshold During Graded Incremental Exercise., Conor J. Raleigh, Bernard Donne, Neil Fleming
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 391-403, 2018. We compared lactate threshold (TLac)with non-invasive markers of an aerobic-anaerobic transition; namely, ventilatory (VT) and tissue saturation index (TSIT) thresholds. While identification of a breakpoint in blood lactate concentration ([BLa]) is common for determination of an aerobic-anaerobic transition, non-invasive measures, VT and NIRS, have also received attention as a means of determining this critical exercise intensity. We hypothesised that one or other of these non-invasive measures would have a strong association with TLac. Thirty-one (n=31) competitive male athletes (mean ± SD, age 29±9 yr, height 1.81±0.1 …
An Analysis Of Collegiate Club-Sport Female Lacrosse Players: Sport-Specific Field Test Performance And The Influence Of Lacrosse Stick Carrying, Robert G. Lockie, Samantha A. Birmingham-Babauta, John J. Stokes, Tricia M. Liu, Fabrice G. Risso, Adrina Lazar, Dominic V. Giuliano, Ashley J. Orjalo, Matthew R. Moreno, Alyssa A. Stage, Deshaun L. Davis
An Analysis Of Collegiate Club-Sport Female Lacrosse Players: Sport-Specific Field Test Performance And The Influence Of Lacrosse Stick Carrying, Robert G. Lockie, Samantha A. Birmingham-Babauta, John J. Stokes, Tricia M. Liu, Fabrice G. Risso, Adrina Lazar, Dominic V. Giuliano, Ashley J. Orjalo, Matthew R. Moreno, Alyssa A. Stage, Deshaun L. Davis
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 269-280, 2018. Lacrosse is a field-based, intermittent sport that requires players to use a stick with a shaft and mesh pocket to manipulate the ball. However, there has been limited analysis of the characteristics of collegiate club-sport players, and whether stick carry influences the sprinting speed of lacrosse players. As a result, this study investigated the field test characteristics of collegiate club-sport female lacrosse players, and the effects of stick carry on linear and change-of-direction speed. Nine players (seven field players, two goalkeepers) volunteered for this study and completed: vertical jump and standing broad …
Acute Specific Effects Of Caffeine-Containing Energy Drink On Different Physical Performances In Resistance-Trained Men, Camilla Astley, Diego Souza, Marcos Polito
Acute Specific Effects Of Caffeine-Containing Energy Drink On Different Physical Performances In Resistance-Trained Men, Camilla Astley, Diego Souza, Marcos Polito
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 260-268, 2018. Caffeine containing energy drink (ED) is frequently used as ergogenic aid, but its effect on performance need more investigation. Thus, the aim of this study was to analyze the effects of acute ingestion of an ED on the physical performance of resistance-trained men subjected to successive tests in the same experimental protocol. Fifteen resistance-trained males (21.0 ± 0.3 yrs; 177.4 ± 1.8 cm; 79.6 ± 1.8 kg) ingested 2.5 mg caffeine per kg of body weight (619.5 ± 14.6 mL of ED) or a placebo in a double-blind randomized cross-over design. Physical …
The Effects Of Medicine Ball Training On Bat Swing Velocity In Prepubescent Softball Players, Mallory S. Kobak, Michael J. Rebold, Stacey L. Buser, Rachele M. Kappler, Ronald Otterstetter
The Effects Of Medicine Ball Training On Bat Swing Velocity In Prepubescent Softball Players, Mallory S. Kobak, Michael J. Rebold, Stacey L. Buser, Rachele M. Kappler, Ronald Otterstetter
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 75-83, 2018. The purpose of this study was to assess the effects of an 8-week medicine ball training program on bat swing velocity in prepubescent softball players. Twenty-seven female prepubescent softball players (age = 10.2 ± 1.2) participated in this study. Participants were randomly assigned to either a medicine ball training (MB = 13) or control (CON = 14) group. Pre- and post-testing consisted of 10 dry swings using the bat that the participants would normally use during competition, which was then followed by 10 hits off of a pitching machine with …
No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown
No Effect Of Assisted Hip Rotation On Bat Velocity, Michelle Rivera, Whitney D. Leyva, David C. Archer, Cameron N. Munger, Casey M. Watkins, Megan A. Wong, Ian J. Dobbs, Andrew J. Galpin, Jared W. Coburn, Lee E. Brown
International Journal of Exercise Science
International Journal of Exercise Science 11(4): 68-74, 2018. Softball and baseball are games that require multiple skill sets such as throwing, hitting and fielding. Players spend a copious amount of time in batting practice in order to be successful hitters. Variables commonly associated with successful hitting include bat velocity and torso rotation. The concept of overspeed bodyweight assistance (BWA) has shown increases in vertical jump and sprint times, but not hip rotation and batting. The purpose of this study was to examine the effects of assisted hip rotation on bat velocity. Twenty-one male and female recreational softball and baseball players …