Running on the hypogravity treadmill AlterG® does not reduce the magnitude of peak tibial impact accelerations

Ueberschär, Olaf; Fleckenstein, Daniel; Wüstenfeld, Jan; Warschun, Frank; Falz, Roberto; Wolfarth, Bernd

doi:10.1016/j.orthtr.2019.10.001

Cited by 7 publications

(15 citation statements)

References 28 publications

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“…Only a few studies have addressed biomechanica l adaptations to hypogravity running in detail (Barnes & Janecke, 2017;Mercer & Chona, 2015;Moran, Rickert, & Greer, 2017;Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019). Recently, we have shown that LBPPT running does not reduce tibial accelerations as a proxy measure of bone loading (Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019). This counterintuitive result has been confirmed by two other research groups (Mercer & Chona, 2015;Moran et al, 2017).…”

Section: Introductionmentioning

confidence: 55%

“…However, a thorough investigation of the biomechanics of hypogravity running reveals that this is not fully conclusive in view of the corresponding effect sizes (see below). Polet et al (Polet et al, 2017, we were able to explain the counterintuitive findings on non-reduced tibial load in hypogravity from a deductive biomechanical perspective (Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019). Briefly, hypogravity implies a shift in the contributions of vertical and horizontal energy cost of running, i.e.…”

Section: Introductionmentioning

confidence: 83%

“…Thereby, hypogravity allows an athlete either to run faster, or to reduce the physiologica l session load for a fixed running speed. Only a few studies have addressed biomechanica l adaptations to hypogravity running in detail (Barnes & Janecke, 2017;Mercer & Chona, 2015;Moran, Rickert, & Greer, 2017;Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019). Recently, we have shown that LBPPT running does not reduce tibial accelerations as a proxy measure of bone loading (Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…: 630 N or 560 N vs. originally 700 N) but not further, since beyond 80 %, running specificity might be lost because of substantial biomechanical adaptations, such as decreased step frequency etc. (Barnes & Janecke, 2017;Fleckenstein et al, 2018;Kline et al, 2015;Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Briefly, hypogravity implies a shift in the contributions of vertical and horizontal energy cost of running, i.e. the cyclic work done by the involved muscles to generate propulsion and dynamic balance during stance and at a given running speed (Polet et al, 2017(Polet et al, , 2018Ueberschär, Fleckenstein, Wüstenfeld, et al, 2019). While vertical work is expended for the vertical landing and take-off "collision" interaction of the runner with the ground during stance phase, the major horizonta l contribution to total energy cost takes place during swing phase.…”

Section: Introductionmentioning

confidence: 99%

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Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective

Ueberschär

Fleckenstein

Warschun

et al. 2019

International Journal of Computer Science in Sport

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Hypogravity treadmills have become a popular training tool in distance running and triathlon. Counter-intuitively, tibial acceleration load is not attenuated by hypogravity unloading during running, while, equally surprisingly, leaps become flatter instead of higher. To explain these effects from a biomechanical perspective, Polet, Schroeder, and Bertram (2017) recently developed an energetic model for hypogravity running and validated it with recreational athletes at a constant jogging speed. The present study was conducted to refine that model for competitive athletes at relevant running speeds of 12–22 km h−1 and gravity levels of 100 %, 80 % and 60 %. Based on new experimental data on 15 well-trained runners in treadmill tests until volitional exhaustion, the enhanced semi-empirical model well describes energy expenditure and the observed biomechanical effects of hypogravity running. Remarkably, anaerobic contributions led to an increase in energy cost per meter for speeds above 16–18 km h−1 (p < 0.001), irrespective of hypogravity unloading. Moreover, some converging trends were observed that might reflect general adaptations in running motor control for optimization of efficiency. In essence, the outcome of this research might help sports scientists and practitioners to design running programs for specific training stimuli, e.g. conditioning of anaerobic energy metabolism.

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Section: Introductionmentioning

confidence: 55%

Section: Introductionmentioning

confidence: 83%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective

Ueberschär

Fleckenstein

Warschun

et al. 2019

International Journal of Computer Science in Sport

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Wearables for Running Gait Analysis: A Systematic Review

et al. 2022

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Background Running gait assessment has traditionally been performed using subjective observation or expensive laboratory-based objective technologies, such as three-dimensional motion capture or force plates. However, recent developments in wearable devices allow for continuous monitoring and analysis of running mechanics in any environment. Objective measurement of running gait is an important (clinical) tool for injury assessment and provides measures that can be used to enhance performance. Objectives We aimed to systematically review the available literature investigating how wearable technology is being used for running gait analysis in adults. Methods A systematic search of the literature was conducted in the following scientific databases: PubMed, Scopus, Web of Science and SPORTDiscus. Information was extracted from each included article regarding the type of study, participants, protocol, wearable device(s), main outcomes/measures, analysis and key findings. Results A total of 131 articles were reviewed: 56 investigated the validity of wearable technology, 22 examined the reliability and 77 focused on applied use. Most studies used inertial measurement units (n = 62) [i.e. a combination of accelerometers, gyroscopes and magnetometers in a single unit] or solely accelerometers (n = 40), with one using gyroscopes alone and 31 using pressure sensors. On average, studies used one wearable device to examine running gait. Wearable locations were distributed among the shank, shoe and waist. The mean number of participants was 26 (± 27), with an average age of 28.3 (± 7.0) years. Most studies took place indoors (n = 93), using a treadmill (n = 62), with the main aims seeking to identify running gait outcomes or investigate the effects of injury, fatigue, intrinsic factors (e.g. age, sex, morphology) or footwear on running gait outcomes. Generally, wearables were found to be valid and reliable tools for assessing running gait compared to reference standards. Conclusions This comprehensive review highlighted that most studies that have examined running gait using wearable sensors have done so with young adult recreational runners, using one inertial measurement unit sensor, with participants running on a treadmill and reporting outcomes of ground contact time, stride length, stride frequency and tibial acceleration. Future studies are required to obtain consensus regarding terminology, protocols for testing validity and the reliability of devices and suitability of gait outcomes. Clinical Trial Registration CRD42021235527.

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Laterality of sacral stress fractures in trained endurance athletes: Are there biomechanical or orthopaedic risk factors?

Riedl

Roediger

Pohlmann

et al. 2022

Sports Orthopaedics and Traumatology

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Running on the hypogravity treadmill AlterG® does not reduce the magnitude of peak tibial impact accelerations

Cited by 7 publications

References 28 publications

Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective

Energy Cost of Running Under Hypogravity in Well-Trained Runners and Triathletes: A Biomechanical Perspective

Wearables for Running Gait Analysis: A Systematic Review

Laterality of sacral stress fractures in trained endurance athletes: Are there biomechanical or orthopaedic risk factors?

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