Winfried Banzer

Overground and walkway ambulation with unilateral hip osteoarthritis: comparison of step length asymmetries and reproducibility of treadmill mounted force plate readings

The purpose of this study was to analyze and compare the degree of step length asymmetry of patients with hip osteoarthritis during free walking and treadmill ambulation and to determine the reproducibility of treadmill based vertical ground reaction force parameters. Twelve subjects with monoarticular hip osteoarthritis undergoing total hip replacement surgery were assessed preoperatively. The assessed parameters were step length, maximal forces at heel strike and push off, minimum force, force inclining and declining rate and relative stance time. The results indicated significant step length differences when comparing overground and treadmill ambulation. The extent of step length asymmetry did not have a consistent expression in different gait conditions. The study demonstrated sufficient intraday reliability for mean GRF measurements. While comparing data from treadmill and walkway locomotion of patients with osteoarthritis it should be taken into account that the amount of step length asymmetry is not identical. Patients with gait disabilities seem to have a somewhat lower level of repeatability and it appears that an increased number of practice or acclimatization trials are necessary.

Sedentäres Verhalten und Gesundheit – Eine selektive Literaturübersicht

Exercise-related public health recommendations and research for increased fitness and health had long focused on vigorous exercise or the lack thereof. Recently scientific interest in possible effects of sedentary behaviour (SB) (sitting) independent of moderate-vigorous intensity exercise has been growing.We conducted a selective literature search in Pubmed and the Sedentary Research Database with the outcomes SB, risk factors, mortality and morbidity in adults. We included only reviews and systematic reviews.Observational studies suggest an association between SB and all-cause and cardiovascular, but not cancer mortality. SB also seems to be associated with diabetes and overweight/weight gain. Evidence for other diseases, such as cardiovascular diseases, hypertension, cancer, and mental diseases is limited also because of the heterogeneity and poor methodology of the -studies. Intervention studies found inconsistent evidence that SB is associated with detrimental effects on markers of cardiometabolic risk.The evidence on the detrimental effects of sedentary behaviour is decreasingly convincing with the endpoints of mortality, -morbidity, and markers of metabolic risk, in that order. Higher TV and screen time, but not total SB seems to be associated with higher all-cause and cardiovascular, but not cancer mortality. Further intervention studies are needed to establish -dose-response relationships and potentially protective effects of cardiorespiratory fitness and physical activity.

Unterbrechungen von Sitzphasen im Berufsalltag

ZusammenfassungRegelmäßige Unterbrechungen könnten negative Effekte langen Sitzens mindern. Ziel der Studie war, die Compliance mit vorgegebenen Unterbrechungsempfehlungen mit einmaliger E-Mail-Information unter realen Bedingungen zu überprüfen.Die 3xa0randomisiert zugeteilten Gruppen (nu2009=u200921, nu2009=u200922 bzw. nu2009=u200924) sollten das Sitzen alle 30, 60 bzw. 120xa0min für mindestens 1xa0min unterbrechen (G30, G60, G120). Unterbrechung wurde als Nichtsitzen definiert. Zielparameter waren die Veränderung über Baseline der Sitzdauer (Zeitspanne zwischen 2xa0Unterbrechungen), Compliance mit vorgegebener Anzahl der Unterbrechungen, subjektives Empfinden, Einschätzung über langfristige Beibehaltung der Empfehlungen (numerische Rating-Skalen 0–10). Die Dokumentation erfolgte selbstadministriert bei Baseline und über 5xa0Untersuchungstagen mithilfe eines standardisierten Erhebungsbogens.Es zeigte sich eine statistisch signifikante Interaktion zwischen Gruppe und Zeit F (7944, 254.216) =u20092129, pu2009<u20090,034, partielles Eta2 =u20090,62. Eine Post-hoc-Analyse mit Bonferroni-Adjustierung wies signifikante Unterschiede der Sitzphasen von Baseline zu allen 5xa0Untersuchungstagen in allen Gruppen aus (pu2009=u20090,0005), nicht jedoch zwischen den einzelnen Untersuchungstagen. In G30, G60 bzw. G120 haben 0, 63 bzw. 25u2009% der Teilnehmer die Angaben erfüllt. Im Vergleich zu den Teilnehmern der G30 zeigten diejenigen der G60 und G120 signifikant ein höheres Maß bei der subjektiven Wahrnehmung der Unterbrechungen und der Bereitschaft, die Empfehlungen auch nach Ende der Intervention weiterzuführen.Eine einmalige Information kann zumindest kurzfristig zur Reduktion der Sitzphasen bei überwiegend sitzender Tätigkeit führen. Die höchste Compliance und die günstigste subjektive Wahrnehmung der Unterbrechungen zeigten sich bei einem Unterbrechungsintervall von 60xa0min.AbstractRegular breaks in sedentary time may counteract the detrimental effects of prolonged sitting. The aim of our study was to investigate the compliance with recommended breaks at different intervals in office-based occupational sitting via a single educational e-mail under real conditions.Subjects were randomized into three groups that took breaks at every 30, 60, or 120xa0min (G30, G60, and G120, nu2009=u200921, nu2009=u200922, and nu2009=u200924, respectively). Breaks were defined as non-sitting. Outcome parameters included change in sitting periods (time span between two breaks) over baseline, compliance with recommended number of breaks, subjective experience, and readiness to follow recommended breaks also after the intervention (NRS, 0–10). Using a standardized data entry form, subjects administered documentation at baseline and on five intervention days.A statistically significant interaction was observed between group and time F: (7,944, 254,216) =u20092,129, pu2009<u20090.034, partial Eta2 =u20090.62. Post hoc analysis with Bonferroni correction revealed significant differences in sitting periods between baseline and all five intervention days in all three groups (pu2009=u20090.0005). No such difference was seen between intervention days. The rates of subjects who complied with recommended number of breaks were 0, 63, and 25u2009% in G30, G60, and G120, respectively. Subjects in G60 and G120 showed significantly higher values than those in G30 in subjective experience and readiness to follow recommended breaks also after the intervention.A single educational e-mail can lead to a reduction of sitting periods for office-based workers at least in the short term. The highest compliance and the most favorable subjective experience were seen with a break interval of 60xa0min.

Health prevention for children and adolescents in competitive sports

The promotion of sport talents in Germany is federally standardised. Apart from the training and management support, annual sports-medical investigations with standardised procedures are mandatory for athletes health and safety. For the first time, this study evaluates the prevalence ratio of medical findings in Hessian top athletes. The data of all athletes presenting in one of the 27 licenced examination centres in Hesse during the period of investigation were evaluated for age, sex and sports discipline as well as medical findings and a trinomial classification of the sports-related health status. The completeness of this collection in the relevant period from November 2006 to October 2007 was assured by cross-checking the application charts of all related sports associations. Data of 1620 (m: 904, 14.8 +/- 2.5 years; w: 716, 14.3 +/- 2.6 years) of all 1713 athletes presenting during the evaluation period were used for analysis. Medical findings (e. g., resulting in follow-up evaluation or further consultations) were seen in 83.5 % of all athletes. A small group (3.6 %) was temporarily, and one single athlete was completely exempted from sports participation. These results underline (additionally to the preventive capability of sports-medical investigations) the need for an annual medical consultation of juvenile athletes. Further investigations should be extended to other districts and classes and might evaluate the direct and indirect costs of diseases.