ZusammenfassungKörperliches Training ist in den aktuellen Leitlinien ein fester Bestandteil der T... more ZusammenfassungKörperliches Training ist in den aktuellen Leitlinien ein fester Bestandteil der Therapie bei stabiler chronischer Herzinsuffizienz (Klasse-IA-Indikation) sowohl bei reduzierter als auch bei erhaltener linksventrikulärer Pumpfunktion. Belastung, Symptomatik und Lebensqualität können durch körperliches Training signifikant verbessert werden. Epidemiologische Daten und verschiedene Studien zeigen, dass ein aktiver Lebensstil im Alter vor der Entwicklung einer Herzinsuffizienz schützt und ein regelmäßiges körperliches Training das Risiko einer Herzinsuffizienz reduziert. Die Wirksamkeit ist sowohl dosis- als auch adhärenzabhängig. Empfohlen wird ein Ausdauertraining in Form eines moderaten, aeroben Trainings („moderate continuous…
The purpose of the present study was to compare muscular strength of knee extensors and arm flexo... more The purpose of the present study was to compare muscular strength of knee extensors and arm flexor muscles of cardiac patients (n = 638) and healthy controls (n = 961) in different age groups. Isometric torques were measured in a sitting position with the elbow, hip, and knee flexed to 90 0 . For statistical analysis, age groups were pooled in decades from the age of 30 to 90 years. Additionally, the influence of physical lifestyle prior to disease on muscular strength was obtained in the patients. For statistical analysis three-way ANOVA (factors age, gender, and physical activity level) was used. Both in patients and in controls a significant age-dependent decline in maximal torque could be observed for arm flexors and knee extensors. Maximal leg extensor muscle showed statistically significant differences between healthy controls and cardiac patients as well as between subgroups of patients: Physically inactive patients showed lowest torques (male: 148 ± 18 Nm; female: 82 ± 25 Nm) while highest values were measured in control subjects (male: 167 ± 16 Nm; female: 93 ± 17 Nm). In contrast, arm flexor muscles did not show any significant influence of health status or sports history. This qualitative difference between weight-bearing leg muscles and the muscle group of the upper extremity suggest that lower skeletal muscle strength in heart patients is mainly a consequence of selective disuse of leg muscles rather than any pathological skeletal muscle metabolism. Since a certain level of skeletal muscle strength is a prerequisite to cope with everyday activities, strength training is recommended as an important part of cardiac rehabilitation.
The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude... more The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude of the tensile residual stresses in the rim of the wheel. As a consequence of the scatter in fracture toughness and magnitude of the residual stresses, different values of the critical flaw sizes are obtained. A simulation process is adopted which takes into consideration the probability distribution of the stresses and fracture toughness. The flaw size which guarantees a survival probability of 90 per cent will be chosen as the representative value of the minimum critical flaw size. A comparison is made with the critical sizes observed at service failures to illustrate the practical application of the probability distribution approach.
... auch dazu die bereits oben erwähnten Beiträge von SCHIPS und SCHÄFFER). Im Beitrag von STIER ... more ... auch dazu die bereits oben erwähnten Beiträge von SCHIPS und SCHÄFFER). Im Beitrag von STIER und Edel wird das Verhalten der amtlich eingesetzten Ana-lyseverfahren CENSUS und BV4 im Frequenzbereich untersucht. ...
ZusammenfassungKörperliches Training ist in den aktuellen Leitlinien ein fester Bestandteil der T... more ZusammenfassungKörperliches Training ist in den aktuellen Leitlinien ein fester Bestandteil der Therapie bei stabiler chronischer Herzinsuffizienz (Klasse-IA-Indikation) sowohl bei reduzierter als auch bei erhaltener linksventrikulärer Pumpfunktion. Belastung, Symptomatik und Lebensqualität können durch körperliches Training signifikant verbessert werden. Epidemiologische Daten und verschiedene Studien zeigen, dass ein aktiver Lebensstil im Alter vor der Entwicklung einer Herzinsuffizienz schützt und ein regelmäßiges körperliches Training das Risiko einer Herzinsuffizienz reduziert. Die Wirksamkeit ist sowohl dosis- als auch adhärenzabhängig. Empfohlen wird ein Ausdauertraining in Form eines moderaten, aeroben Trainings („moderate continuous…
The purpose of the present study was to compare muscular strength of knee extensors and arm flexo... more The purpose of the present study was to compare muscular strength of knee extensors and arm flexor muscles of cardiac patients (n = 638) and healthy controls (n = 961) in different age groups. Isometric torques were measured in a sitting position with the elbow, hip, and knee flexed to 90 0 . For statistical analysis, age groups were pooled in decades from the age of 30 to 90 years. Additionally, the influence of physical lifestyle prior to disease on muscular strength was obtained in the patients. For statistical analysis three-way ANOVA (factors age, gender, and physical activity level) was used. Both in patients and in controls a significant age-dependent decline in maximal torque could be observed for arm flexors and knee extensors. Maximal leg extensor muscle showed statistically significant differences between healthy controls and cardiac patients as well as between subgroups of patients: Physically inactive patients showed lowest torques (male: 148 ± 18 Nm; female: 82 ± 25 Nm) while highest values were measured in control subjects (male: 167 ± 16 Nm; female: 93 ± 17 Nm). In contrast, arm flexor muscles did not show any significant influence of health status or sports history. This qualitative difference between weight-bearing leg muscles and the muscle group of the upper extremity suggest that lower skeletal muscle strength in heart patients is mainly a consequence of selective disuse of leg muscles rather than any pathological skeletal muscle metabolism. Since a certain level of skeletal muscle strength is a prerequisite to cope with everyday activities, strength training is recommended as an important part of cardiac rehabilitation.
The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude... more The fracture of tread-braked monobloc railway wheels is predominantly influenced by the magnitude of the tensile residual stresses in the rim of the wheel. As a consequence of the scatter in fracture toughness and magnitude of the residual stresses, different values of the critical flaw sizes are obtained. A simulation process is adopted which takes into consideration the probability distribution of the stresses and fracture toughness. The flaw size which guarantees a survival probability of 90 per cent will be chosen as the representative value of the minimum critical flaw size. A comparison is made with the critical sizes observed at service failures to illustrate the practical application of the probability distribution approach.
... auch dazu die bereits oben erwähnten Beiträge von SCHIPS und SCHÄFFER). Im Beitrag von STIER ... more ... auch dazu die bereits oben erwähnten Beiträge von SCHIPS und SCHÄFFER). Im Beitrag von STIER und Edel wird das Verhalten der amtlich eingesetzten Ana-lyseverfahren CENSUS und BV4 im Frequenzbereich untersucht. ...
Uploads
Papers by Claus Edel