John C. Garner
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View article: Impact of Differing Instability Devices on Postural Sway Parameters
Impact of Differing Instability Devices on Postural Sway Parameters Open
Single-limb balance training is integral to preventing and rehabilitating lower extremity injuries. Previous investigations have shown that when using instability devices, differences may or may not exist in the postural sway parameters du…
View article: Seasonal Change in Countermovement Jump Performance in NCAA Women’s Golfers
Seasonal Change in Countermovement Jump Performance in NCAA Women’s Golfers Open
Background of Study: The countermovement vertical jump (CMJ) task has been reported to have positive associations with golf-specific performance variables. Additionally, the CMJ is commonly used to assess neuromuscular fatigue in athletic …
View article: Occupational Footwear Design Influences Biomechanics and Physiology of Human Postural Control and Fall Risk
Occupational Footwear Design Influences Biomechanics and Physiology of Human Postural Control and Fall Risk Open
While design modifications present on work boots improve safety, they may not always provide optimal human performance during work tasks. Understanding the impact of these different design features on biomechanical and physiological postur…
View article: Preliminary results from the LUX‐Dx insertable cardiac monitor remote programming and performance (LUX‐Dx PERFORM) study
Preliminary results from the LUX‐Dx insertable cardiac monitor remote programming and performance (LUX‐Dx PERFORM) study Open
Despite the wide adoption of insertable cardiac monitors (ICMs), high false‐positive rates, suboptimal signal quality, limited ability to detect atrial flutter, and lack of remote programming remain challenging. The LUX‐Dx PERFORM study wa…
View article: The Influence of Shoe and Cleat Type on Lower Extremity Muscle Activation in Youth Baseball Pitchers
The Influence of Shoe and Cleat Type on Lower Extremity Muscle Activation in Youth Baseball Pitchers Open
Background: Baseball pitching is a dynamic movement where the lower extremities generate and sequentially transfer energy to the upper extremities to maximize ball velocity. The need for lower body muscular strength to produce adequate pus…
View article: Association Between Body Composition and Vertical Jump Performance in Female Collegiate Volleyball Athletes
Association Between Body Composition and Vertical Jump Performance in Female Collegiate Volleyball Athletes Open
Background of Study: Associations between measures of body composition and vertical jump height have previously been established using a range of instrumentation and prediction equations. Limited data has presented using gold standard meas…
View article: Sensory Organization Test Conditions Influence Postural Strategy Rather than Footwear or Workload
Sensory Organization Test Conditions Influence Postural Strategy Rather than Footwear or Workload Open
Background: Postural strategies such as ankle, hip, or combined ankle-hip strategies are used to maintain optimal postural stability, which can be influenced by the footwear type and physiological workload. Purpose: This paper reports prev…
View article: Squat Jump Movement Onset Thresholds Influence on Kinetics and Kinematics
Squat Jump Movement Onset Thresholds Influence on Kinetics and Kinematics Open
Background of Study: Differing movement onset thresholds have been used when analyzing the squat jump movement from force-time data obtained from a force platform. This makes comparisons difficult between investigations as this will impact…
View article: Role of Occupational Footwear and Prolonged Walking on Lower Extremity Muscle Activation during Maximal Exertions and Postural Stability Tasks
Role of Occupational Footwear and Prolonged Walking on Lower Extremity Muscle Activation during Maximal Exertions and Postural Stability Tasks Open
Background: Occupational footwear and a prolonged duration of walking have been previously reported to play a role in maintaining postural stability. The purpose of this paper was to analyze the impact of three types of occupational footwe…
View article: An analysis of postural control strategies in various types of footwear with varying workloads
An analysis of postural control strategies in various types of footwear with varying workloads Open
Footwear and physiological workload have been reported to impact postural stability. Analyses of postural strategies during sensory organisation test (SOT) can aid better understanding of postural control behaviour. The paper reports previ…
View article: Lower Extremity Muscle Activation in Alternative Footwear during Stance Phase of Slip Events
Lower Extremity Muscle Activation in Alternative Footwear during Stance Phase of Slip Events Open
Muscle activity from the slipping leg have been previously used to analyze slip induced falls. However, the impact of casual alternative footwear on slipping leg muscle activity when exposed to slippery environments is still unknown. The p…
View article: Comparison of Countermovement and Squat Jumps Performance In Recreationally Trained Males
Comparison of Countermovement and Squat Jumps Performance In Recreationally Trained Males Open
The vertical jump has been shown to be an effective tool in assessing neuromuscular fatigue. The two most common iterations of the vertical jump are the countermovement and squat jumps. This investigation sought to identify if differences …
View article: Kinematic and Coordination Variability in Runners with and Without Patellofemoral Pain
Kinematic and Coordination Variability in Runners with and Without Patellofemoral Pain Open
Background: Patellofemoral pain (PFP) is a common overuse injury that has been suggested to cause abnormal gait kinematics and variability in runners with PFP. Conflicting results have been presented as to the variability of joint kinemati…
View article: Muscle Activity during Postural Stability Tasks: Role of Military Footwear and Load Carriage
Muscle Activity during Postural Stability Tasks: Role of Military Footwear and Load Carriage Open
Decrements to postural control manifest as an increase in muscle activity, indicating continuous attempts to maintain body equilibrium and postural stability. Extrinsic factors such as footwear, and intrinsic factors such as muscle fatigue…
View article: Comparison of anthropometrics and physical performance in professional baseball pitchers
Comparison of anthropometrics and physical performance in professional baseball pitchers Open
Objectives: Previous investigations have shown that differences exist between positional groups within a team, which has led to more specific methods of training to enhance performance for that positional group during competition. The purp…
View article: Examining Changes in Bat Swing Kinematics in Different Areas of the Strike Zone in Collegiate Baseball Players
Examining Changes in Bat Swing Kinematics in Different Areas of the Strike Zone in Collegiate Baseball Players Open
Background: According to the National Collegiate Athletic Association (NCAA) there are over 34,000 athletes who compete in baseball at the collegiate level. These individuals spend countless hours training to improve their ability at bat p…
View article: Using Motion Sensor Technology to Manage Risk of Injury in a Strength and Conditioning Program for Female Collegiate Athletes
Using Motion Sensor Technology to Manage Risk of Injury in a Strength and Conditioning Program for Female Collegiate Athletes Open
Background of Study: Females generally have a 6-8 times higher risk for lower extremity injury compared to male counterparts due to biomechanical differences and/or poor landing strategies. In recent years, a great deal of focus has been p…
View article: Impact of Hydration Status on Jump Performance in Recreationally Trained Males
Impact of Hydration Status on Jump Performance in Recreationally Trained Males Open
The vertical jump is commonly used as a means of evaluating athlete readiness. Athletes have been shown to arrive to training and competition in a hypohydrated state. Thus, this investigation sought to examine the impact of hydration statu…
View article: Impact of Hydration Status on Electromyography and Ratings of Perceived Exertion During the Vertical Jump
Impact of Hydration Status on Electromyography and Ratings of Perceived Exertion During the Vertical Jump Open
Background: The vertical jumping task is commonly used to assess lower-body power output in athletic populations, in addition to being commonly used to during investigations of hydration and anaerobic performance. Changes in neuromuscular …
View article: Differences in Falls and Recovery from a Slip Based on an Individual’s Lower Extremity Corrective Response
Differences in Falls and Recovery from a Slip Based on an Individual’s Lower Extremity Corrective Response Open
Background: Slips and falls account for high rates of injury and mortality in multiple populations. The corrective responses during the slip perturbation have been well documented. However, when a fall results from a slip, it is unclear wh…
View article: The relationship between measures of lower body power and pitching velocity in professional baseball pitchers
The relationship between measures of lower body power and pitching velocity in professional baseball pitchers Open
Objectives: The purpose of this study was to examine the relationship between lower-body power output and pitching velocity in professional baseball pitchers. Design and Methods: A cross-sectional design was used to assess twenty-seven min…
View article: Influences of Athletic Footwear on Ground Reaction Forces During A Sidestep Cutting Maneuver on Artificial Turf
Influences of Athletic Footwear on Ground Reaction Forces During A Sidestep Cutting Maneuver on Artificial Turf Open
Background: Recreational athletes can select their desired footwear based on personal preferences of shoe properties such as comfort and weight. Commonly worn running shoes and cleated footwear with similar stud geometry and distribution a…
View article: Postural Control in Workplace Safety: Role of Occupational Footwear and Workload
Postural Control in Workplace Safety: Role of Occupational Footwear and Workload Open
Maintaining postural stability is crucial, especially in hazardous occupational environments. The purpose of the study was to assess the role of three occupational footwear (low top shoe (LT); tactical work boot (TB) and steel-toed work bo…
View article: Evaluating Human Balance Following an Exercise Intervention in Previously Sedentary, Overweight Adults
Evaluating Human Balance Following an Exercise Intervention in Previously Sedentary, Overweight Adults Open
Previous research suggests that an improvement in body composition could potentially lead to improvement in balance performance in previously overweight individuals. The purpose of this study was to evaluate if an exercise intervention wit…
View article: Strength and Conditioning
Strength and Conditioning Open
While a graduate assistant, he was responsible for isokinetic performance testing
View article: A Prospective Study Comparing Distance-based vs. Time-based Exercise Prescriptions of Walking and Running in Previously Sedentary Overweight Adults
A Prospective Study Comparing Distance-based vs. Time-based Exercise Prescriptions of Walking and Running in Previously Sedentary Overweight Adults Open
Prior work has reported that the declines observed in body mass index (BMI) and circumference measurements in their cross-sectional data were twice as large when calculated from distance energy expenditure estimations compared to energy ex…
View article: Impact of alternative footwear on human energy expenditure
Impact of alternative footwear on human energy expenditure Open
Purpose: Use of alternative footwear options such as flip-flop style sandals and minimalist athletic shoes are becoming increasingly popular footwear choices. The purpose of the investigation was to analyze the energy expenditure and oxyge…
View article: The Effects of a Self-Adapted, Jaw Repositioning Mouthpiece and Jaw Clenching on Muscle Activity during Vertical Jump and Isometric Clean Pull Performance
The Effects of a Self-Adapted, Jaw Repositioning Mouthpiece and Jaw Clenching on Muscle Activity during Vertical Jump and Isometric Clean Pull Performance Open
Purpose: The purpose of this study was to investigate the effects of a self-adapted, jaw repositioning mouthpiece and jaw clenching on muscle activity during the countermovement vertical jump (CMVJ) and isometric mid-thigh clean pull (MTCP…