Learn More
Although sediment is a natural constituent of rivers, excess loading to rivers and streams is a leading cause of impairment and biodiversity loss. Remedial actions require identification of the sources and mechanisms of sediment supply. This task is complicated by the scale and complexity of large watersheds as well as changes in climate and land use that(More)
Propulsion in swimming is achieved by complex sculling movements with elbow quasi-fixed on the antero-posterior axis to transmit forces from the hand and the forearm to the body. The purpose of this study was to investigate how elbow muscle coactivation was influenced by the front crawl stroke phases. Ten international level male swimmers performed a 200-m(More)
Sound inverse dynamics modeling is lacking in aquatic locomotion research because of the difficulty in measuring hydrodynamic forces in dynamic conditions. Here we report the successful implementation and validation of an innovative methodology crossing new computational fluid dynamics and inverse dynamics techniques to quantify upper limb joint forces and(More)
The human musculoskeletal system must modulate work and power output in response to substantial alterations in mechanical demands associated with different tasks. In particular, in water, upper limb muscles must perform net positive work to replace the energy lost against the dissipative fluid load. Where in the upper limb are work and power developed? Is(More)
PURPOSE To investigate electromyographical (EMG) profiles characterizing the lower-limb flexion-extension in an aquatic environment in high-level breaststrokers. METHODS The 2-dimensional breaststroke kick of 1 international- and 2 national-level female swimmers was analyzed during 2 maximal 25-m swims. The activities of biceps femoris, rectus femoris,(More)
  • E. A. Zeller, J. Bernsohn, W. M. Inskip, J. W. Lauer
  • 2004
auf 50~ erw/~rmt u n d 15 mi n bet 3000 U/ ra in zen t r i fug ier t . Je 42 cm 8 des gek lg r t en Saf tes w u r d e n ffir 9 0 m i n bet 3 0 0 0 0 U / m i n ( luf tget r iebene U l t r a -Zen t r i fuge Modell 194, P h y w e A.G., G6t t ingen) zent r i fugier t , der B o d e n s a t z in 7 c ma Ko l tho f f -Puf fe r oder m/20 B o r a x L 6 s u n g gel6st(More)