Zdenek Svoboda - Academia.edu (original) (raw)

Papers by Zdenek Svoboda

Research paper thumbnail of Experience Related Impacts on Jump Performance of Elite and Collegiate Basketball Players; Investigation on Force-Time Curvature Variables

Research paper thumbnail of Relationships between force-time curve variables and jump height during countermovement jumps in young elite volleyball players

Research paper thumbnail of Reliability of Ankle–Foot Complex Isokinetic Strength Assessment Using the Isomed 2000 Dynamometer

Medicina

For quantifying muscle strength in clinical and research practice, establishing the reliability o... more For quantifying muscle strength in clinical and research practice, establishing the reliability of measurements, specifically to the procedures used, is essential for credible findings. The objective was to establish the reliability of isokinetic measurement of ankle plantar and dorsal flexors (PF/DF) and invertors and evertors (INV/EV) on an IsoMed 2000 dynamometer. Twenty healthy subjects (10 males, 10 females, mean age: 23.1 ± 3.1 years) completed an isokinetic measurement session. The intraclass correlation coefficient (ICC) and standard error of measurement were assessed for peak torque and work of ankle PF/DF (concentric and eccentric) and INV/EV (concentric) for the preferred and nonpreferred limb. Standardized isokinetic measurements of reciprocal PF/DF and INV/EV muscle actions were associated with ICC ranging from 0.77 to 0.98 for the majority of observed parameters. The exception was work in the eccentric mode in the ankle DF and peak torque in the concentric mode in the ...

Research paper thumbnail of P 096 - Differences in postural stability in the elderly: Not all tests measure the same

Gait & posture, Jan 26, 2018

Measurements of the center of pressure (CoP) acquired with a person positioned on a force plate i... more Measurements of the center of pressure (CoP) acquired with a person positioned on a force plate is one of the most commonly used tool to investigate a balance. Several studies show a significant degradation of the body stability after the age of 60 years, however, these conclusions were based on a limited number of indicators. Also, these studies don't take into consideration the change in stability in very old age groups and sex of subjects.In our study, not all parameters lead to the same conclusions. The vast majority of the results didn't show any statistically significant difference when considering the age groups. Therefore, it is not advisable to use a small number of parameters for the assessment of postural stability. When comparing the group of women with the group of men, most parameters show statistically significant differences during standing on foam surface and with closed eyes. In the case of the standing on a firm surface and with open eyes, parameters did n...

Research paper thumbnail of Assessment of postural stability in stable and unstable conditions

Acta of bioengineering and biomechanics, 2017

The aim of the study was to determine whether it is possible to assess static balance on an unsta... more The aim of the study was to determine whether it is possible to assess static balance on an unstable surface using center of pressure velocities obtained with a force platform when standing on a wobble board. The center of pressure velocities were recorded with a force platform within three days (four trials per day) in thirty young adults in three conditions: standing on a rigid surface, compliant surface, and on a wobble board. Reliability of mean velocities of the center of pressure was examined using intraclass correlation coefficients. Relationships between the three conditions were assessed with Pearson correlation coefficients. Intra-session reliability was excellent for standing on a rigid surface and on a compliant surface and good for standing on a wobble board. Inter-session reliability was good for all parameters in all conditions, except for poor reliability in the anterior-posterior direction in standing on a wobble board. All correlations between the same parameter in...

Research paper thumbnail of KINEMATIC ANALYSIS OF GAIT IN PATIENTS WITH JUVENILE HALLUX VALGUS DEFORMITY(1B3 Orthopaedic & Rehabilitation Biomechanics III)

The Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics

Research paper thumbnail of Relation between knee extensors' strength, postural stability and variability of centre of pressure displacement during gait in adult women

Research paper thumbnail of Evaluation of the effect of heel lift on postural stability and symmetry of muscle activity

Journal of Back and Musculoskeletal Rehabilitation

Research paper thumbnail of Intra- and inter-session reliability of traditional and entropy-based variables describing stance on a wobble board

Medical Engineering & Physics

Research paper thumbnail of Postural control during single leg stance in slackliners and controls

Research paper thumbnail of The effect of fatigue on bipedal postural control in patients with severe chronic obstructive pulmonary disease

European Respiratory Journal, 2016

Research paper thumbnail of The effect of brisk walking on postural stability, bone mineral density, body weight and composition in women over 50 years with a sedentary occupation: a randomized controlled trial

Research paper thumbnail of Temporal symmetry of sound and prosthetic limbs during transtibial amputee gait with various prosthetic alignment

Research paper thumbnail of Time–motion analysis of basketball players: a reliability assessment of Video Manual Motion Tracker 1.0 software

Http Dx Doi Org 10 1080 02640414 2013 805237, Feb 21, 2014

Research paper thumbnail of The influence of walking speed on equine back motion in relation to hippotherapy

Wiener Tierarztliche Monatsschrift, 2010

Research paper thumbnail of Fuzzy expert system for determining the human gait phase

2014 International Conference on Applied Electronics, Sep 1, 2014

Research paper thumbnail of The Variability of a Horse’s Movement at Walk in Hippotherapy

Kineziologija, Dec 31, 2012

Research paper thumbnail of Dočasná symetrie zdravých a protetických končetin během chůze osoby s transtibiální amputací s různým protetickým zařazením Temporal symmetry of sound and prosthetic limbs during transtibial amputee gait with various prosthetic alignment

Research paper thumbnail of Quantification of Trunk Postural Stability Using Convex Polyhedron of the Time-Series Accelerometer Data

Journal of Healthcare Engineering, 2016

Techniques to quantify postural stability usually rely on the evaluation of only two variables, t... more Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron (CP), together with a traditional method, based on area of the confidence ellipse (ACE). Ten patients (Pts) with cerebellar ataxia and eleven healthy individuals of control group (CG) participated in the study. The results show a significant increase of volume of the CP (CPV) in Pts or CG standing on foam surface with eyes open (EO) and eyes closed (EC) after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confi...

Research paper thumbnail of Effect of repeated therapeutic horse riding sessions on the trunk movement of the rider

Neuro endocrinology letters, Jan 19, 2015

To assess the rider's movement during walking the horse in repeated therapeutic horse riding ... more To assess the rider's movement during walking the horse in repeated therapeutic horse riding sessions and to determine the relationship between movements of the horse's back and the rider's trunk. A total of 12 healthy females (age: 23.3±2.8 years; height: 167.3±4.2 cm; weight: 59.2±5.3 kg) participated in 10 therapeutic horse riding sessions. Two English Thoroughbreds with similar body constitution (aged 19 and 14 years) were used in the experiment. Nine markers were placed on the rider's body and the horse's back, and four video cameras with a 25 Hz frequency were used. Collected data were processed with APAS software. The mediolateral displacements of C7, Th12, and L5 were gradually decreasing in each of the first three sessions. Statistically significant differences (p<0.05) were found between individual sessions in the displacement of C7, Th12 and L5 in the mediolateral and vertical directions as well as in the shoulder and pelvic lateral tilt and rotatio...

Research paper thumbnail of Experience Related Impacts on Jump Performance of Elite and Collegiate Basketball Players; Investigation on Force-Time Curvature Variables

Research paper thumbnail of Relationships between force-time curve variables and jump height during countermovement jumps in young elite volleyball players

Research paper thumbnail of Reliability of Ankle–Foot Complex Isokinetic Strength Assessment Using the Isomed 2000 Dynamometer

Medicina

For quantifying muscle strength in clinical and research practice, establishing the reliability o... more For quantifying muscle strength in clinical and research practice, establishing the reliability of measurements, specifically to the procedures used, is essential for credible findings. The objective was to establish the reliability of isokinetic measurement of ankle plantar and dorsal flexors (PF/DF) and invertors and evertors (INV/EV) on an IsoMed 2000 dynamometer. Twenty healthy subjects (10 males, 10 females, mean age: 23.1 ± 3.1 years) completed an isokinetic measurement session. The intraclass correlation coefficient (ICC) and standard error of measurement were assessed for peak torque and work of ankle PF/DF (concentric and eccentric) and INV/EV (concentric) for the preferred and nonpreferred limb. Standardized isokinetic measurements of reciprocal PF/DF and INV/EV muscle actions were associated with ICC ranging from 0.77 to 0.98 for the majority of observed parameters. The exception was work in the eccentric mode in the ankle DF and peak torque in the concentric mode in the ...

Research paper thumbnail of P 096 - Differences in postural stability in the elderly: Not all tests measure the same

Gait & posture, Jan 26, 2018

Measurements of the center of pressure (CoP) acquired with a person positioned on a force plate i... more Measurements of the center of pressure (CoP) acquired with a person positioned on a force plate is one of the most commonly used tool to investigate a balance. Several studies show a significant degradation of the body stability after the age of 60 years, however, these conclusions were based on a limited number of indicators. Also, these studies don't take into consideration the change in stability in very old age groups and sex of subjects.In our study, not all parameters lead to the same conclusions. The vast majority of the results didn't show any statistically significant difference when considering the age groups. Therefore, it is not advisable to use a small number of parameters for the assessment of postural stability. When comparing the group of women with the group of men, most parameters show statistically significant differences during standing on foam surface and with closed eyes. In the case of the standing on a firm surface and with open eyes, parameters did n...

Research paper thumbnail of Assessment of postural stability in stable and unstable conditions

Acta of bioengineering and biomechanics, 2017

The aim of the study was to determine whether it is possible to assess static balance on an unsta... more The aim of the study was to determine whether it is possible to assess static balance on an unstable surface using center of pressure velocities obtained with a force platform when standing on a wobble board. The center of pressure velocities were recorded with a force platform within three days (four trials per day) in thirty young adults in three conditions: standing on a rigid surface, compliant surface, and on a wobble board. Reliability of mean velocities of the center of pressure was examined using intraclass correlation coefficients. Relationships between the three conditions were assessed with Pearson correlation coefficients. Intra-session reliability was excellent for standing on a rigid surface and on a compliant surface and good for standing on a wobble board. Inter-session reliability was good for all parameters in all conditions, except for poor reliability in the anterior-posterior direction in standing on a wobble board. All correlations between the same parameter in...

Research paper thumbnail of KINEMATIC ANALYSIS OF GAIT IN PATIENTS WITH JUVENILE HALLUX VALGUS DEFORMITY(1B3 Orthopaedic & Rehabilitation Biomechanics III)

The Proceedings of the Asian Pacific Conference on Biomechanics : emerging science and technology in biomechanics

Research paper thumbnail of Relation between knee extensors' strength, postural stability and variability of centre of pressure displacement during gait in adult women

Research paper thumbnail of Evaluation of the effect of heel lift on postural stability and symmetry of muscle activity

Journal of Back and Musculoskeletal Rehabilitation

Research paper thumbnail of Intra- and inter-session reliability of traditional and entropy-based variables describing stance on a wobble board

Medical Engineering & Physics

Research paper thumbnail of Postural control during single leg stance in slackliners and controls

Research paper thumbnail of The effect of fatigue on bipedal postural control in patients with severe chronic obstructive pulmonary disease

European Respiratory Journal, 2016

Research paper thumbnail of The effect of brisk walking on postural stability, bone mineral density, body weight and composition in women over 50 years with a sedentary occupation: a randomized controlled trial

Research paper thumbnail of Temporal symmetry of sound and prosthetic limbs during transtibial amputee gait with various prosthetic alignment

Research paper thumbnail of Time–motion analysis of basketball players: a reliability assessment of Video Manual Motion Tracker 1.0 software

Http Dx Doi Org 10 1080 02640414 2013 805237, Feb 21, 2014

Research paper thumbnail of The influence of walking speed on equine back motion in relation to hippotherapy

Wiener Tierarztliche Monatsschrift, 2010

Research paper thumbnail of Fuzzy expert system for determining the human gait phase

2014 International Conference on Applied Electronics, Sep 1, 2014

Research paper thumbnail of The Variability of a Horse’s Movement at Walk in Hippotherapy

Kineziologija, Dec 31, 2012

Research paper thumbnail of Dočasná symetrie zdravých a protetických končetin během chůze osoby s transtibiální amputací s různým protetickým zařazením Temporal symmetry of sound and prosthetic limbs during transtibial amputee gait with various prosthetic alignment

Research paper thumbnail of Quantification of Trunk Postural Stability Using Convex Polyhedron of the Time-Series Accelerometer Data

Journal of Healthcare Engineering, 2016

Techniques to quantify postural stability usually rely on the evaluation of only two variables, t... more Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron (CP), together with a traditional method, based on area of the confidence ellipse (ACE). Ten patients (Pts) with cerebellar ataxia and eleven healthy individuals of control group (CG) participated in the study. The results show a significant increase of volume of the CP (CPV) in Pts or CG standing on foam surface with eyes open (EO) and eyes closed (EC) after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confi...

Research paper thumbnail of Effect of repeated therapeutic horse riding sessions on the trunk movement of the rider

Neuro endocrinology letters, Jan 19, 2015

To assess the rider's movement during walking the horse in repeated therapeutic horse riding ... more To assess the rider's movement during walking the horse in repeated therapeutic horse riding sessions and to determine the relationship between movements of the horse's back and the rider's trunk. A total of 12 healthy females (age: 23.3±2.8 years; height: 167.3±4.2 cm; weight: 59.2±5.3 kg) participated in 10 therapeutic horse riding sessions. Two English Thoroughbreds with similar body constitution (aged 19 and 14 years) were used in the experiment. Nine markers were placed on the rider's body and the horse's back, and four video cameras with a 25 Hz frequency were used. Collected data were processed with APAS software. The mediolateral displacements of C7, Th12, and L5 were gradually decreasing in each of the first three sessions. Statistically significant differences (p<0.05) were found between individual sessions in the displacement of C7, Th12 and L5 in the mediolateral and vertical directions as well as in the shoulder and pelvic lateral tilt and rotatio...