Andrzej Wit | Josef Pilsudski University of Physical Education in Warsaw, Poland (original) (raw)

Papers by Andrzej Wit

Research paper thumbnail of Laterality versus jumping performance in men and women

Acta of bioengineering and biomechanics / Wroclaw University of Technology

The aim of this study was to investigate relationships between functional asymmetry of lower limb... more The aim of this study was to investigate relationships between functional asymmetry of lower limbs, taking into account morphological features of the feet, and jumping ability in men and women. The study population consisted of 56 subjects, 30 women (age: 20.29 ± 0.59 years; body mass: 58.13 ± 4.58 kg, body height: 165.60 ± 5.03 cm) and 26 men (age: 20.41 ± 0.78 years, body mass: 78.39 ± 8.42 kg, body height: 181.15 ± 6.52 cm). The measurements of longitudinal arches were performed with the plan- tographic method on the basis of Clarke's angle mapped on a computer foot print. The measurements of jumping performance during bilateral (two legs) and unilateral (single-leg) counter movement jump (CMJ) were done on force plate. All subjects jumped three times each type of jump (total 9 jumps): three right leg, three left leg and three two legs. We put the test results through a detailed statistical analysis with the Statistica 8.0. The t-test for dependent variables and the Wilcoxon ...

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Research paper thumbnail of Comparison of four methods of calculating the symmetry of spatial-temporal parameters of gait

Acta of bioengineering and biomechanics / Wrocław University of Technology, 2014

Although gait symmetry is being evaluated and reported in the literature with increasing frequenc... more Although gait symmetry is being evaluated and reported in the literature with increasing frequency, there is still no generally accepted standard for assessing symmetry, making it difficult to compare studies and establish criteria to guide clinical decision-making. The purpose of this study was to ascertain whether gait symmetry in healthy subjects is consistent when assessed using various coefficients (RI, SI, GA, and SA), and if possible to identify a gait symmetry coefficient with the highest diagnostic utility. The study involved a group of 58 healthy university-level students of physical education and secondary school students aged 20.03±0.97. Measurements of spatial-temporal gait parameters were conducted using the ZEBRIS platform. Our analysis supports existing recommendations that the symmetry index (SI) should be used as the most sensitive assessment of gait symmetry on the basis of spatial-temporal parameters in healthy subjects. Moreover, we developed normative values of...

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Research paper thumbnail of Artificial Neural Networks (ANN) Applied for Gait Classification and Physiotherapy Monitoring in Post Stroke Patients

Artificial Neural Networks - Methodological Advances and Biomedical Applications, 2011

... Katarzyna Kaczmarczyk1, Andrzej Wit1,2, Maciej Krawczyk1,3 and Jacek Zaborski4 1Józef Piłsuds... more ... Katarzyna Kaczmarczyk1, Andrzej Wit1,2, Maciej Krawczyk1,3 and Jacek Zaborski4 1Józef Piłsudski University of Physical Education ... Oczkowski & Barreca (1997) attempted to predict functional outcomes and discharge placement for moderately impaired stroke patients. ...

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Research paper thumbnail of The effectiveness of a pendulum swing for the development of leg strength and counter‐movement jump performance

Journal of Sports Sciences, 1995

Various training devices have been developed to facilitate 'plyometric' training,... more Various training devices have been developed to facilitate 'plyometric' training, one such device being the 'pendulum swing'. To assess the effectiveness of the pendulum swing, the results of a 3 week training programme using a combination of pendulum swing and weight-training exercises were compared to those of a weight-training programme. Subjects were assigned to one of two groups (n = 9) for weight-training only or for combined pendulum and weight-training. Both groups performed the same number of exercise repetitions. Measurements of isometric knee and hip extension-flexion, 1-RM squat weight, maximum jump height and power for a counter-movement jump were taken pre-training, 2 days after the end of the programme and 2 weeks after the end of the programme. The data were analysed using two-way MANOVA and MANCOVA techniques. Both methods showed significant (P < 0.05) increases in knee and hip extension strength. Hip and knee flexion strength increased only for the weight-trained group. Counter-movement jump height increased for both groups (weight-trained, P < 0.05; combined, P < 0.01). Maximum power increased only for the combined group (P < 0.05). When the pre-training scores were used as a covariate, the weight-trained group showed a greater increase in hip flexion and extension strength and knee flexion strength than the combined training group (P < 0.05). The combined group showed the greatest increase in knee extensor strength. It is concluded that the pendulum system induces a training effect which could be used to supplement weight-training for improving vertical jump performance.

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Research paper thumbnail of Forearm tremor during isometric elbow flexion

Journal of Biomechanics, 1992

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Research paper thumbnail of Associations between gait patterns, brain lesion factors and functional recovery in stroke patients

Gait & Posture, 2012

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Research paper thumbnail of Adjustments in gait symmetry with walking speed in trans-femoral and trans-tibial amputees

Gait & Posture, 2003

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Research paper thumbnail of Gait classification in post-stroke patients using artificial neural networks

Gait & Posture, 2009

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Research paper thumbnail of Lower limb laterality versus foot structure in men and women

Biomedical Human Kinetics, 2013

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Research paper thumbnail of Laterality versus jumping performance in men and women

Acta of bioengineering and biomechanics / Wroclaw University of Technology

The aim of this study was to investigate relationships between functional asymmetry of lower limb... more The aim of this study was to investigate relationships between functional asymmetry of lower limbs, taking into account morphological features of the feet, and jumping ability in men and women. The study population consisted of 56 subjects, 30 women (age: 20.29 ± 0.59 years; body mass: 58.13 ± 4.58 kg, body height: 165.60 ± 5.03 cm) and 26 men (age: 20.41 ± 0.78 years, body mass: 78.39 ± 8.42 kg, body height: 181.15 ± 6.52 cm). The measurements of longitudinal arches were performed with the plan- tographic method on the basis of Clarke's angle mapped on a computer foot print. The measurements of jumping performance during bilateral (two legs) and unilateral (single-leg) counter movement jump (CMJ) were done on force plate. All subjects jumped three times each type of jump (total 9 jumps): three right leg, three left leg and three two legs. We put the test results through a detailed statistical analysis with the Statistica 8.0. The t-test for dependent variables and the Wilcoxon ...

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Research paper thumbnail of Comparison of four methods of calculating the symmetry of spatial-temporal parameters of gait

Acta of bioengineering and biomechanics / Wrocław University of Technology, 2014

Although gait symmetry is being evaluated and reported in the literature with increasing frequenc... more Although gait symmetry is being evaluated and reported in the literature with increasing frequency, there is still no generally accepted standard for assessing symmetry, making it difficult to compare studies and establish criteria to guide clinical decision-making. The purpose of this study was to ascertain whether gait symmetry in healthy subjects is consistent when assessed using various coefficients (RI, SI, GA, and SA), and if possible to identify a gait symmetry coefficient with the highest diagnostic utility. The study involved a group of 58 healthy university-level students of physical education and secondary school students aged 20.03±0.97. Measurements of spatial-temporal gait parameters were conducted using the ZEBRIS platform. Our analysis supports existing recommendations that the symmetry index (SI) should be used as the most sensitive assessment of gait symmetry on the basis of spatial-temporal parameters in healthy subjects. Moreover, we developed normative values of...

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Research paper thumbnail of Artificial Neural Networks (ANN) Applied for Gait Classification and Physiotherapy Monitoring in Post Stroke Patients

Artificial Neural Networks - Methodological Advances and Biomedical Applications, 2011

... Katarzyna Kaczmarczyk1, Andrzej Wit1,2, Maciej Krawczyk1,3 and Jacek Zaborski4 1Józef Piłsuds... more ... Katarzyna Kaczmarczyk1, Andrzej Wit1,2, Maciej Krawczyk1,3 and Jacek Zaborski4 1Józef Piłsudski University of Physical Education ... Oczkowski & Barreca (1997) attempted to predict functional outcomes and discharge placement for moderately impaired stroke patients. ...

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Research paper thumbnail of The effectiveness of a pendulum swing for the development of leg strength and counter‐movement jump performance

Journal of Sports Sciences, 1995

Various training devices have been developed to facilitate 'plyometric' training,... more Various training devices have been developed to facilitate 'plyometric' training, one such device being the 'pendulum swing'. To assess the effectiveness of the pendulum swing, the results of a 3 week training programme using a combination of pendulum swing and weight-training exercises were compared to those of a weight-training programme. Subjects were assigned to one of two groups (n = 9) for weight-training only or for combined pendulum and weight-training. Both groups performed the same number of exercise repetitions. Measurements of isometric knee and hip extension-flexion, 1-RM squat weight, maximum jump height and power for a counter-movement jump were taken pre-training, 2 days after the end of the programme and 2 weeks after the end of the programme. The data were analysed using two-way MANOVA and MANCOVA techniques. Both methods showed significant (P < 0.05) increases in knee and hip extension strength. Hip and knee flexion strength increased only for the weight-trained group. Counter-movement jump height increased for both groups (weight-trained, P < 0.05; combined, P < 0.01). Maximum power increased only for the combined group (P < 0.05). When the pre-training scores were used as a covariate, the weight-trained group showed a greater increase in hip flexion and extension strength and knee flexion strength than the combined training group (P < 0.05). The combined group showed the greatest increase in knee extensor strength. It is concluded that the pendulum system induces a training effect which could be used to supplement weight-training for improving vertical jump performance.

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Research paper thumbnail of Forearm tremor during isometric elbow flexion

Journal of Biomechanics, 1992

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Research paper thumbnail of Associations between gait patterns, brain lesion factors and functional recovery in stroke patients

Gait & Posture, 2012

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Research paper thumbnail of Adjustments in gait symmetry with walking speed in trans-femoral and trans-tibial amputees

Gait & Posture, 2003

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Research paper thumbnail of Gait classification in post-stroke patients using artificial neural networks

Gait & Posture, 2009

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Research paper thumbnail of Lower limb laterality versus foot structure in men and women

Biomedical Human Kinetics, 2013

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