<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>47</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Hellmers, Sandra</style></author><author><style face="normal" font="default" size="100%">Fudickar, Sebastian</style></author><author><style face="normal" font="default" size="100%">Dasenbrock, Lena</style></author><author><style face="normal" font="default" size="100%">Heinks, Andrea</style></author><author><style face="normal" font="default" size="100%">Bauer, Jürgen M</style></author><author><style face="normal" font="default" size="100%">Hein, Andreas</style></author></authors><secondary-authors><author><style face="normal" font="default" size="100%">Nathalia, Peixoto</style></author><author><style face="normal" font="default" size="100%">Silveira, Margarida</style></author><author><style face="normal" font="default" size="100%">H., Ali Hesham</style></author><author><style face="normal" font="default" size="100%">Carlos, Maciel</style></author><author><style face="normal" font="default" size="100%">van den Broek Egon L</style></author></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">A Model-Based Approach for Jump Analyses Regarding Strength and Balance</style></title><secondary-title><style face="normal" font="default" size="100%">Biomedical Engineering Systems and Technologies</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">accepted</style></keyword><keyword><style  face="normal" font="default" size="100%">full paper</style></keyword><keyword><style  face="normal" font="default" size="100%">UNIAMT</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2018</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2018</style></date></pub-dates></dates><publisher><style face="normal" font="default" size="100%">Springer International Publishing</style></publisher><pub-location><style face="normal" font="default" size="100%">Cham</style></pub-location><pages><style face="normal" font="default" size="100%">354 - 375</style></pages><isbn><style face="normal" font="default" size="100%">978-3-319-94806-5</style></isbn><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">To identify the functional decline as related to aging, geriatric assessments are an established instrument. Within such assessments, the functional ability is evaluated and consists of the three major components: strength, mobility, and balance. Counter movement jumps (CMJ) are well-suited to test these three essential elements of functional ability within a single assessment item. Since common balance measures have been shown to be significantly prone to algorithmic and technical variations, a robust alternative method is required. Thus, we introduce a model-based approach for balance and strength analyses, where the human lower extremities are modeled as an oscillating system during the phase of landing and recovery after a vertical jump. In the System and Control Technology, a transfer function of an oscillating system is described by a second-order delay element (PT2-element), which is characterized by the parameters natural frequency and damping. We analyze the jumps of 30 participants (70-87 years) regarding their jump phases and the mentioned parameters. A linear correlation between jump power and jump height, which are sensitive indicators of the muscle performance and the strength could be confirmed. While a correlation between jump power and spring constant could be observed, a significant relationship between the balance ability and natural frequency could not be identified.</style></abstract></record></records></xml>