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The effect of proximal dynamic stabilizazion on hand muscle strength
Dzvoník, Ján ; Kobesová, Alena (advisor) ; Ježková, Martina (referee)
The aim of this study is to evaluate the effect of dynamic stabilizing strategy on handgrip and pinchgrip strength. Exercise utilized in this study was based on rehabilitative approach called Dynamic Neuromuscular Stabilization (DNS) - a developmental kinesiology approach. The exercise program consisted of four primal developmental positions (3½ month supine position, oblique sitting position with support on forearm, position on all fours, and the "bear" position). A study file consisted of ten females who were instructed in basic scheme of DNS exercise. They were instructed to exercise at home five times weekly for a 6- weeks period. One exercise lesson took about thirty minutes. Both handgrip and pinchgrip strength was measured using the digital dynamometer CITEC CT 3001 recording maximum voluntary isometric contraction (MVIC). Three-pinch grip strength and fist grip strength was measured for both upper extremities. Fist grip strength was measured in three positions of forearm (pronation, supination and neutral position). Overall eight variables (for each extremity, grip form and position of the forearm) measured before and after exercise program were compared using the paired t-test. Significant increase in muscle strength (p<0,05) was identified for all eight variables after a 6 weeks exercise...
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Critical power and force during continuous and intermittent contraction of finger flexors
Malečková, Lucie ; Baláš, Jiří (advisor) ; Kodejška, Jan (referee)
Title: Critical power and force during continuous and intermittent contractions of finger flexors Objectives: The aim of the study was to determine critical force of finger flexors during continuous exercise and to determine critical power at different work - relief ratios during intermittent exercise. Methods: Eight participants volunteered in the study (age 23,1 ± 1,8 years, height 172,9 ± 7,3 cm, body mass 67,1 ± 4,8 kg, climbing experience 5,4 ± 2,1 years and climbing performance from 6 to 8 on the Union International des Associations d'Alpinisme scale). Participants undertook one continuous and three intermittent handgrip contractions (work to relief ratio of 8:2, 7:3, 6:4) to failure at 60% and 40% maximal voluntary contraction (MVC) for dominant and non-dominant hand, respectively. For continuous contraction, the critical force was calculated from two exercises at 40% and 60% MVC and inversed time to failure using linear regression analysis; for intermitent contraction, the critical power was calculated from the three contraction ratios and inversed time to failure using linear regression analysis. Results: Critical force for continuous contraction was found at 20,4 ± 5,9 % MVC. The critical power for intermittent contractions was considered not to be valid and is not indicated. Conclusion:...
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Changes in handgrip strength in relation to laterality at indoor youth climbing course
Janatová, Klára ; Nováková, Tereza (advisor) ; Vláčilová, Ivana (referee)
Title: Changes in handgrip strength in relation to laterality at indoor youth climbing course Objectives: The aim of this diploma theses is to investigate whether regular climbing activity of children at age 7-11 leads to development of handgrip stength or its endurance with respect to laterality. Also if climbing leads to symetrical strenghtening of upper limbs. Methods: Group of 14 children at age 7-11 participated in a climbing course once a week for 3 months. Maximal grip strength was measured, persistence in pressing hand over 30 seconds and evaluation of laterality. First testing was done in October 2016 and second after 3 months in January 2017. Results: The research involved 13 right-handed and 1 left-handed participant and degree of laterality remained unchanged. Grip strength of dominant upper limb was stronger in 10 children from 13 (October 2016 - first measuring) at the first measurement. Our results suggest that climbing activities for three months, according to statistical analysis (t-test Microsoft Excel 2010), may contribute to the symetrical strengthening of upper limbs in 88%. We have discovered two types development phenomena - visualised as 2 distinct curves that show the development of strength in 30 seconds. Keywords: Children, indoor climbing, preference, handedness,...
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The effect of proximal dynamic stabilizazion on hand muscle strength
Dzvoník, Ján ; Kobesová, Alena (advisor) ; Ježková, Martina (referee)
The aim of this study is to evaluate the effect of dynamic stabilizing strategy on handgrip and pinchgrip strength. Exercise utilized in this study was based on rehabilitative approach called Dynamic Neuromuscular Stabilization (DNS) - a developmental kinesiology approach. The exercise program consisted of four primal developmental positions (3½ month supine position, oblique sitting position with support on forearm, position on all fours, and the "bear" position). A study file consisted of ten females who were instructed in basic scheme of DNS exercise. They were instructed to exercise at home five times weekly for a 6- weeks period. One exercise lesson took about thirty minutes. Both handgrip and pinchgrip strength was measured using the digital dynamometer CITEC CT 3001 recording maximum voluntary isometric contraction (MVIC). Three-pinch grip strength and fist grip strength was measured for both upper extremities. Fist grip strength was measured in three positions of forearm (pronation, supination and neutral position). Overall eight variables (for each extremity, grip form and position of the forearm) measured before and after exercise program were compared using the paired t-test. Significant increase in muscle strength (p<0,05) was identified for all eight variables after a 6 weeks exercise...
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