Refine
Year of publication
- 2024 (8)
Document Type
Conference Type
- Konferenzartikel (4)
- Konferenz-Abstract (2)
Language
- English (8)
Is part of the Bibliography
- yes (8)
Keywords
- Biomechanics (8)
Institute
Open Access
- Open Access (8)
- Bronze (6)
- Gold (1)
- Hybrid (1)
Managing lower extremity loading in distance running by altering sagittal plane trunk leaning
(2024)
Background
Trunk lean angle is an underrepresented biomechanical variable for modulating and redistributing lower extremity joint loading and potentially reducing the risk of running-related overuse injuries. The purpose of this study was to systematically alter the trunk lean angle in distance running using an auditory real-time feedback approach and to derive dose–response relationships between sagittal plane trunk lean angle and lower extremity (cumulative) joint loading to guide overuse load management in clinical practice.
Methods
Thirty recreational runners (15 males and 15 females) ran at a constant speed of 2.5 m/s at 5 systematically varied trunk lean conditions on a force-instrumented treadmill while kinematic and kinetic data were captured.
Results
A change in trunk lean angle from –2° (extension) to 28° (flexion) resulted in a systematic increase in stance phase angular impulse, cumulative impulse, and peak moment at the hip joint in the sagittal and transversal plane. In contrast, a systematic decrease in these parameters at the knee joint in the sagittal plane and the hip joint in the frontal plane was found (p < 0.001). Linear fitting revealed that with every degree of anterior trunk leaning, the cumulative hip joint extension loading increases by 3.26 Nm·s/kg/1000 m, while simultaneously decreasing knee joint extension loading by 1.08 Nm·s/kg/1000 m.
Conclusion
Trunk leaning can reduce knee joint loading and hip joint abduction loading, at the cost of hip joint loading in the sagittal and transversal planes during distance running. Modulating lower extremity joint loading by altering trunk lean angle is an effective strategy to redistribute joint load between/within the knee and hip joints. When implementing anterior trunk leaning in clinical practice, the increased demands on the hip musculature, dynamic stability, and the potential trade-off with running economy should be considered.
This study aimed to investigate the effects of ankle taping on lower extremity joint biomechanics. Kinetic and kinematic data were collected from 25 participants using 3D motion capturing and force platforms without shoes for running (RUN), drop jumping (DJ), and 180° change of direction (COD), in tape applied fresh (TF) and tape after sports-specific use (TU) conditions compared to a barefoot (BF) baseline. Taping conditions decreased peak ankle excursions and moments for the frontal and sagittal planes for some of the sports-specific movements. However, TF did not significantly alter the knee and hip moments in the frontal and sagittal planes. Reducing ankle excursion likely offers some protection to extreme joint ranges. To reduce restrictions imposed by fresh taping on the sagittal plane ankle ROM, applying ankle taping already during the pre-match warm-up might be useful.
The study aimed to establish dose-response relationships between systematically altered anterior trunk leaning (ATL) and lower extremity cumulative joint loading (angular impulse x number of strides) as well as cost of transport (COT) in distance running. Twenty-eight recreational runners underwent a series of six treadmill runs (2.5 m/s) with five predefined ATL conditions (from -4° extension to 28° flexion) and one self-selected ATL condition for five minutes with 3D motion capture and spirometry. Increasing ATL systematically decreased cumulative knee joint loading and increased cumulative hip joint loading in all conditions. However, running outside the preferred running style increased COT. Designing ATL-based overuse load management interventions shows promise, but clinical implementation requires careful consideration of the COT and joint loading trade-offs.
We investigated the trade-off between metabolic cost and dynamic stability in 15 recreational runners who experienced sudden slip-like anteroposterior perturbations (SLAPs) during treadmill running (2.5 m/s). Following SLAPs, a significant 3.4% increase in the cost of transport was observed. However, there were no significant changes in single gait parameters or lower limb kinematics in the sagittal plane. Future investigations should explore the underlying neuromuscular mechanisms and broader functional biomechanical variables. Overall, we show that human motor control prioritizes dynamic stability more when expecting SLAPs compared to non-expecting them, highlighting a potential trade-off between metabolic efficiency and traumatic injury prevention that warrants further exploration of underlying mechanisms.
This study aimed to identify the impact of different forefoot cushioning properties in “advanced spiked footwear” on sprinting performance during the block start. Kinetic parameters were collected for twenty-three competitive sprinters during a block sprint start in two advanced spike conditions with only a difference in forefoot cushioning stiffness. An instrumented start block was used to measure the ground reaction forces applied in the front and rear leg. The stiffer shoe condition showed significantly better performance for most parameters, suggesting a softer midsole in forefoot cushioning is not related to better block start performance. This study has demonstrated that differences in midsole materials can alter sprinting block performance and should be considered when analysing advanced spikes features, especially across different shoe brands and their cushioning technologies.
The effect of fresh and used ankle taping on lower limb biomechanics in sports specific movements
(2024)
Objectives
We aimed to investigate the effects of ankle taping on lower extremity biomechanics related to injury development and how these effects change after sports-specific use.
Design
Randomized, repeated measures design with three conditions: Barefoot, tape applied fresh, and tape after sports-specific use (between-subject factor: sex).
Methods
Twenty-five healthy participants (ten female) performed sports-specific movements, including running, drop jumping, and 180° change of direction, under the three conditions. Kinetic and kinematic data were collected using 3D motion capturing and force platforms.
Results
Tape applied fresh and tape after sports-specific use significantly reduced peak ankle inversion. Biomechanical risk factors for anterior cruciate ligament or running overuse injuries were either unchanged or decreased with tape applied fresh, except for the peak loading rate of the resultant ground reaction force, which increased between 4% and 18% between movement types. After 15 minutes of sports-specific use of the tape, the alterations induced by tape applied fresh remained for some biomechanical risk factors while they became closer to barefoot again for others, indicating a differential response to prolonged use of taping for different biomechanical variables.
Conclusions
Ankle taping protects the ankle joint by reducing biomechanical risk factors associated with ankle sprains, and most biomechanical risk factors for anterior cruciate ligament or running overuse injuries are not increased. Further research is needed to explore the duration of protective effects, variations across sports, and its impact on patients with chronic ankle instability, contributing to a more comprehensive understanding of ankle taping's influence on lower extremity biomechanics.