Marc Klimstra
YOU?
Author Swipe
View article: Fall Risk for Older Adults is Impacted by the Frequency and Intensity of Physical Activity
Fall Risk for Older Adults is Impacted by the Frequency and Intensity of Physical Activity Open
Engaging in physical activity is known to prevent falls in older adults, however the relative influence of the intensity, duration and frequency of physical activity is unclear. This study investigated the relationship between fall history…
View article: Contribution of trunk swing to the performance of fixed-seat rowing
Contribution of trunk swing to the performance of fixed-seat rowing Open
Introduction This study aimed to test the contribution of trunk swing to the performance during fixed-seat rowing in eligible and non-eligible (NE) para rowers. Assessment of trunk swing is used to classify para rowers with physical disabi…
View article: Rugby Sevens sRPE Workload Imputation Using Objective Models of Measurement
Rugby Sevens sRPE Workload Imputation Using Objective Models of Measurement Open
While accurate athlete load monitoring is crucial for preventing injury and optimizing performance, the commonly used session rating of perceived exertion training load or competition load method faces limitations due to compliance issues …
View article: A Comparison of the Application of Load Monitoring Metrics for Key Match Characteristics in Women’s Rugby Sevens
A Comparison of the Application of Load Monitoring Metrics for Key Match Characteristics in Women’s Rugby Sevens Open
In rugby sevens, multiple high-speed matches in quick succession make effective workload monitoring essential to support decision-making around athlete preparedness and competition strategy. Match characteristics like score differential, p…
View article: COGNITIVE PERFORMANCE DIFFERENTIALLY MODERATES THE ASSOCIATION BETWEEN GAIT VELOCITY AND FALL RISK
COGNITIVE PERFORMANCE DIFFERENTIALLY MODERATES THE ASSOCIATION BETWEEN GAIT VELOCITY AND FALL RISK Open
Cognitive-walking dual-task paradigms are an effective tool for assessing fall risk. Surprisingly, the moderating influence of cognitive performance on the association between gait velocity (GV) and fall risk has not been explored. The pre…
View article: The Minimum Number of Strides Required for Reliable Gait Measurements in Older Adult Fallers and Non-Fallers
The Minimum Number of Strides Required for Reliable Gait Measurements in Older Adult Fallers and Non-Fallers Open
While the value of walking gait metrics collected using pressure-sensing walkways has shown promise for fall risk assessment, there is no consensus on the minimum number of strides required to obtain reliable metrics. This study aimed to d…
View article: Radar Sensor Data Fitting for Accurate Linear Sprint Modelling
Radar Sensor Data Fitting for Accurate Linear Sprint Modelling Open
Background: Accurate linear sprint modelling is essential for evaluating athletes’ performance, particularly in terms of force, power, and velocity capabilities. Radar sensors have emerged as a critical tool in capturing precise velocity d…
View article: Exponential Functions Permit Estimation of Anaerobic Work Capacity and Critical Power from Less than 2 Min All-Out Test
Exponential Functions Permit Estimation of Anaerobic Work Capacity and Critical Power from Less than 2 Min All-Out Test Open
The Critical Power Model (CPM) is key for assessing athletes’ aerobic and anaerobic energy systems but typically involves lengthy, exhausting protocols. The 3 min all-out test (3MT) simplifies CPM assessment, yet its duration remains deman…
View article: The Relationship Between Horizontal Jumping and Sprinting Ability Across Sexes in Young Active Adults
The Relationship Between Horizontal Jumping and Sprinting Ability Across Sexes in Young Active Adults Open
Purpose: The purpose of this research was to investigate the relationship between horizontal jump distance, 10 m time, and 30–40 m time in multi-sport athletes separated by sex and sprint speed. Methods: A total of 1352 athletes (742 males…
View article: Estimate Anaerobic Work Capacity and Critical Power with Constant-Power All-Out Test
Estimate Anaerobic Work Capacity and Critical Power with Constant-Power All-Out Test Open
Background: The critical power model (CPM) is used extensively in sports to characterize fitness by estimating anaerobic work capacity (W’) and critical power (CP). Traditionally, estimates of CP and W’ require repeated, time-consuming tes…
View article: Predicting Athlete Workload in Women’s Rugby Sevens Using GNSS Sensor Data, Contact Count and Mass
Predicting Athlete Workload in Women’s Rugby Sevens Using GNSS Sensor Data, Contact Count and Mass Open
The use of session rating of perceived exertion (sRPE) as a measure of workload is a popular athlete load monitoring tool. However, the nature of sRPE means the contribution of salient, sport-specific factors to athlete load in field sport…
View article: The Determination of On-Water Rowing Stroke Kinematics Using an Undecimated Wavelet Transform of a Rowing Hull-Mounted Accelerometer Signal
The Determination of On-Water Rowing Stroke Kinematics Using an Undecimated Wavelet Transform of a Rowing Hull-Mounted Accelerometer Signal Open
Boat acceleration profiles can provide valuable information for coaches and practitioners to make meaningful technical interventions and monitor the determinants of success in rowing. Previous studies have used simple feature detection met…
View article: Erosion of Stumble Correction Evoked with Superficial Peroneal Nerve Stimulation in Older Adults during Walking
Erosion of Stumble Correction Evoked with Superficial Peroneal Nerve Stimulation in Older Adults during Walking Open
In healthy young adults, electrical stimulation of the superficial peroneal cutaneous nerve (SPn) innervating the dorsum of the foot has been shown to elicit functionally relevant reflexes during walking that are similar to those evoked by…
View article: A Comparison of Bioelectric and Biomechanical EMG Normalization Techniques in Healthy Older and Young Adults during Walking Gait
A Comparison of Bioelectric and Biomechanical EMG Normalization Techniques in Healthy Older and Young Adults during Walking Gait Open
This study compares biomechanical and bioelectric electromyography (EMG) normalization techniques across disparate age cohorts during walking to assess the impact of normalization methods on the functional interpretation of EMG data. The b…
View article: Wheelchair Rugby Sprint Force-Velocity Modeling Using Inertial Measurement Units and Sport Specific Parameters: A Proof of Concept
Wheelchair Rugby Sprint Force-Velocity Modeling Using Inertial Measurement Units and Sport Specific Parameters: A Proof of Concept Open
Background: Para-sports such as wheelchair rugby have seen increased use of inertial measurement units (IMU) to measure wheelchair mobility. The accessibility and accuracy of IMUs have enabled the quantification of many wheelchair metrics …
View article: A Simple and Valid Method to Calculate Wheelchair Frame Rotation Using One Wheel-Mounted IMU
A Simple and Valid Method to Calculate Wheelchair Frame Rotation Using One Wheel-Mounted IMU Open
Wheelchair sports have been using Inertial Measurement Units (IMU) to measure mobility metrics during training, testing and competition. Presently, the most suitable solution to calculate wheelchair speed and frame rotation is the 3IMU met…
View article: Evaluation of Different Pressure-Based Foot Contact Event Detection Algorithms across Different Slopes and Speeds
Evaluation of Different Pressure-Based Foot Contact Event Detection Algorithms across Different Slopes and Speeds Open
If validated, in-shoe pressure measuring technology allows for the field-based quantification of running gait, including kinematic and kinetic measures. Different algorithmic methods have been proposed to determine foot contact events from…
View article: Characterization of the Kinetyx SI Wireless Pressure-Measuring Insole during Benchtop Testing and Running Gait
Characterization of the Kinetyx SI Wireless Pressure-Measuring Insole during Benchtop Testing and Running Gait Open
This study characterized the absolute pressure measurement error and reliability of a new fully integrated (Kinetyx, SI) plantar-pressure measurement system (PPMS) versus an industry-standard PPMS (F-Scan, Tekscan) during an established be…
View article: Can Principal Component Analysis Be Used to Explore the Relationship of Rowing Kinematics and Force Production in Elite Rowers during a Step Test? A Pilot Study
Can Principal Component Analysis Be Used to Explore the Relationship of Rowing Kinematics and Force Production in Elite Rowers during a Step Test? A Pilot Study Open
Investigating the relationship between the movement patterns of multiple limb segments during the rowing stroke on the resulting force production in elite rowers can provide foundational insight into optimal technique. It can also highligh…
View article: Sex Differences in Spatiotemporal Gait Parameters of Transtibial Amputees
Sex Differences in Spatiotemporal Gait Parameters of Transtibial Amputees Open
Research addressing lower limb amputee gait and prosthetic design often focuses on men, despite female lower limb amputees having different risk factors and lower success with their prosthetics overall. It is widely agreed that sex differe…
View article: Comparison of Imputation Methods for Missing Rate of Perceived Exertion Data in Rugby
Comparison of Imputation Methods for Missing Rate of Perceived Exertion Data in Rugby Open
Rate of perceived exertion (RPE) is used to calculate athlete load. Incomplete load data, due to missing athlete-reported RPE, can increase injury risk. The current standard for missing RPE imputation is daily team mean substitution. Howev…
View article: Age-related erosion of obstacle avoidance reflexes evoked with electrical stimulation of tibial nerve during walking
Age-related erosion of obstacle avoidance reflexes evoked with electrical stimulation of tibial nerve during walking Open
In young healthy adults, characteristic obstacle avoidance reflexes have been demonstrated in response to electrical stimulation of cutaneous afferents of the foot during walking. It is unknown whether there is an age-related erosion of th…
View article: Comparing executive function, evoked hemodynamic response, and gait as predictors of variations in mobility for older adults
Comparing executive function, evoked hemodynamic response, and gait as predictors of variations in mobility for older adults Open
These results are in keeping with assertions that diminished executive control is related to fall risk. Notably, the group differences observed in prefrontal cortical activation and in gait parameters may ultimately precede those observed …
View article: Neuromechanical interactions between the limbs during human locomotion: an evolutionary perspective with translation to rehabilitation
Neuromechanical interactions between the limbs during human locomotion: an evolutionary perspective with translation to rehabilitation Open
During bipedal locomotor activities, humans use elements of quadrupedal neuronal limb control. Evolutionary constraints can help inform the historical ancestry for preservation of these core control elements support transfer of the huge bo…