Suchergebnisse

Einleitend erläutert der Autor den Begriff der Nachhaltigkeit und das Prinzip der nachhaltigen Entwicklung. Anschließend skizziert er die Bestrebungen der Vereinten Nationen zur Förderung nachhaltiger Entwicklung, insbesondere das Aktionsprogramm der Agenda 21 und die von 2005 bis 2014 andauernde UN-Weltdekade "Bildung für nachhaltige Entwicklung". In den folgenden Kapiteln stellt der Autor schließlich die Maßnahmen der deutschen Regierung dar, anlässlich der UN-Dekade "Bildung für nachhaltige Entwicklung" voranzutreiben. Neben dem Aktionsplan zur UN-Dekade werden mit dem runden Tisch der Allianz "Nachhaltigkeit lernen", offiziellen Dekadeprojekten und Kommunen der Weltdekade weitere Maßnahmen genannt. Abschließend geht der Autor auf das Projekt "leben gestalten lernen" des Landesbund für Vogelschutz in Bayern e.V. als Beispiel ein, wie Bildung für nachhaltige Entwicklung bereits im Kindergarten umsetzbar und auch im Fremdsprachenunterricht anwendbar gefördert werden kann. (DIPF/ ssch)

Radioaktivität -- Strahlungsdetektoren -- Grundmeßaufgaben der Strahlungsmeßtechnik -- Quellen ionisierender Strahlung -- Wechselwirkung zwischen ?-, ?-, ?- und Neutronenstrahlung und Stoff -- Anwendung von Radionukliden in der Industrie und Technik -- Strahlenschutz -- Radiochemie -- Trennung und Anreicherung von Radioelementen -- Anwendung radioaktiver Nuklide in der chemischen Analyse -- Radioelemente als Leitisotope (Indikatoren) -- Kohlenstoff-14 und Tritium.

In women's artistic gymnastics, difficult elements with great flight heights have to be performed on the apparatuses. However, the importance of the physical condition for generating flight height and its development with age remains elusive. Therefore, we investigated the age-related differences of lower body power, reactive strength, 20 m sprint speed, flight heights (basic elements on beam and floor) and run-up speed on the vault of 33 youth female gymnasts. Further, we calculated correlations between all parameters separately for different age groups (7–9 y; 10–12 y; 13–15 y). We found larger differences between the age groups 7–9 y and 10–12 y than between 10–12 y and 13–15 y on the apparatuses (10–12 y vs. 7–9 y: +23% to +52%; 13–15 y vs. 10–12 y: +2% to +24%) and for physical conditioning variables (10–12 y vs. 7–9 y: +12 to +24%; 13–15 y vs. 10–12 y: + 5% to +16%). The correlations between flight heights and physical condition were the lowest for age group 7–9 y (r: from −0.47 to 0.78; 10–12 y: r: from −0.19 to 0.80; 13–15 y: r: from −0.20 to 0.90). An optimal application of the physical condition to enhance the gymnastics-specific performance (e.g., flight height) is strongly age-dependent. Regular monitoring of jumping abilities and the derivation of training recommendations can accelerate this development and the future performance of young athletes.

This study investigated PAPE effects of two conditioning activities (CA) and recovery times on the peak jumping power (PP) of elite female volleyball athletes. Players performed CA separately: three sets of three repetitions of back squats with 85% of 1RM (BS) or one set of five depth drops (DD). PP was measured with countermovement (CMJ) and squat jumps (SJ) before (pre-test) and two minutes (post-test 1) and six hours (post-test 2) after each CA. BS significantly reduced PP at post-test 1 (CMJ and SJ: p < 0.04, d between −0.36 and −0.28). At post-test 2, following BS, PP for both jump forms was significantly greater than at post-test 1 (p < 0.001, d between 0.54 and 0.55) and at pre-test (p < 0.048, d between 0.21 and 0.30). DD increased PP significantly (CMJ and SJ p < 0.05, d between 0.40 and 0.41) relative to pre-test at post-test 2 (there was no significant difference between pre-test and post-test 1). Comparing BS with DD, there were no significant differences (p > 0.05). The greatest PAPE effects were observed six hours after BS. CA are recommended for female athletes to improve jumping performance, but individual responses should be determined prior to use.

In male elite gymnastics, lately, eccentric training is often used to improve the maximum specific strength of static elements on rings. Therefore, in this study, we aimed to investigate the effects of a three-week, gymnastic-specific, eccentric-isokinetic (0.1 m/s) cluster training with a change of stimulus after three of six training sessions (eccentric-isokinetic with additional load) on a computer-controlled training device on the improvement of the elements swallow and support scale on rings. Maximum strength and strength endurance in maintaining the static positions of ten international elite male gymnasts were determined on a weekly basis. After three weeks of training, specific maximum strength and strength endurance increased significantly (strength: swallow: +8.72%, p < 0.001; support scale: 8.32%, p < 0.0001; strength endurance: swallow: +122.36%; p = 0.02; Support Scale: +93.30%; p = 0.03). Consequently, top gymnasts can considerably improve ring-specific strength and strength endurance in only three weeks. The separate analysis of the effects of both eccentric-isokinetic training modalities showed that efficiency might even be increased in future training interventions. We suggest using this type of training in phases in which the technical training load is low and monitoring the adaptations in order to compile an individually optimized training after an intervention.

On rings, in men's artistic gymnastics, the general strength requirements for important static elements remain elusive. Therefore, the aim was to describe the relationship between a new conditioning strength test and a maximum strength test of static elements on rings in order to determine the minimal strength level (benchmarks) required to maintain these elements with one's own body weight. Nineteen elite gymnasts performed a concentric (1RM isoinertial) and eccentric (isokinetic: 0.1 m/s) conditioning strength test for swallow/support scale (supine position) and inverted cross (seated position) on a computer-controlled device and a maximum strength test maintaining these elements for 5 s on rings with counterweight or additional weight. High correlation coefficients were found between the conditioning maximum strength for swallow/support scale (r: 0.65 to 0.92; p < 0.05) and inverted cross (r: 0.62 to 0.69; p > 0.05) and the maximum strength of the elements on rings. Strength benchmarks varied between 56.66% (inverted cross concentric) and 94.10% (swallow eccentric) of body weight. Differences in biomechanical characteristics and technical requirements of strength elements on rings may (inter alia) explain the differences between correlations. Benchmarks of conditioning strength may help coaches and athletes systematize the training of strength elements on rings.

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