Assessment of accelerometer-derived data in the context of seat height changes in cycling and the impact on running in triathlon

2021 ◽  
pp. 175433712110537
Author(s):  
Stuart A Evans ◽  
Daniel A James ◽  
David Rowlands ◽  
James B Lee
Keyword(s):  
Weight Bearing ◽  
Longitudinal Direction ◽  
Sensor Technology ◽  
Seat Position ◽  
Trunk Acceleration ◽  
Foot Strike ◽  
Cycling Event ◽  
Olympic Sport ◽  
The Impact ◽  
Derived Data

Triathlon has been an Olympic sport since the 2000 Sydney Olympics and has developed rapidly, leading to variations in race categories. Although running after cycling necessitates a postural change from a non-weight-bearing activity to a weight bearing one, no study has quantified the magnitude of trunk acceleration during cycling in different seat positions and the consequential effect on running. Therefore, this study was conducted to evaluate the effectiveness of a triaxial accelerometer to determine acceleration magnitudes of the trunk in a 20 km outdoor cycling event in two seat positions that were immediately followed by a 5 km overground run. Interpretation of data was evaluated based on cadence changes while triathletes cycled in an aerodynamic position in two seat positions. Running data was evaluated based on sinusoidal curves and foot strike peaks. The evaluation of accelerometer derived data within a characteristic overground setting suggests that cycling in an adjusted seat position significantly reduced trunk acceleration in both longitudinal and mediolateral directions with large effects ( p < 0.0001, d > 0.9). A significant and large effect was found in both longitudinal and anteroposterior trunk acceleration in post-cycle running between seat positions ( d > 0.9, p < 0.0001). In the longitudinal direction, a significant reduction in trunk acceleration occurred when running after the seat was adjusted with participants completing the 5 km run faster (21:55 ± 3:17 min compared to 22:05 ± 2:53 min). The results suggest that when the seat position is adjusted based on individual anthropometrics, overall trunk acceleration magnitude is reduced in both cycling and running. Accessible and practical sensor technology could be beneficial for postural considerations in triathlons.

scholarly journals Can Optimizing the Mechanical Environment Deliver a Clinically Significant Reduction in Fracture Healing Time?

Biomedicines ◽  
2021 ◽  
Vol 9 (6) ◽  
pp. 691
Author(s):  
Jan Barcik ◽  
Devakara R. Epari
Keyword(s):  
Fracture Healing ◽  
Bone Healing ◽  
Mechanical Stimulation ◽  
Callus Formation ◽  
Weight Bearing ◽  
Healing Process ◽  
Healing Time ◽  
Mechanical Environment ◽  
Clinically Significant ◽  
The Impact

The impact of the local mechanical environment in the fracture gap on the bone healing process has been extensively investigated. Whilst it is widely accepted that mechanical stimulation is integral to callus formation and secondary bone healing, treatment strategies that aim to harness that potential are rare. In fact, the current clinical practice with an initially partial or non-weight-bearing approach appears to contradict the findings from animal experiments that early mechanical stimulation is critical. Therefore, we posed the question as to whether optimizing the mechanical environment over the course of healing can deliver a clinically significant reduction in fracture healing time. In reviewing the evidence from pre-clinical studies that investigate the influence of mechanics on bone healing, we formulate a hypothesis for the stimulation protocol which has the potential to shorten healing time. The protocol involves confining stimulation predominantly to the proliferative phase of healing and including adequate rest periods between applications of stimulation.

scholarly journals Reducing the Influence of Environmental Factors on Performance of a Diffusion-Based Personal Exposure Kit

Sensors ◽  
2021 ◽  
Vol 21 (14) ◽  
pp. 4637
Author(s):  
Huixin Zong ◽  
Peter Brimblecombe ◽  
Li Sun ◽  
Peng Wei ◽  
Kin-Fai Ho ◽  
...  
Keyword(s):  
Exposure Assessment ◽  
Real Time ◽  
Low Cost ◽  
Personal Exposure ◽  
Sensor Technology ◽  
Heterogeneous Environments ◽  
Mathematical Algorithms ◽  
Personal Exposure Assessment ◽  
Address System ◽  
The Impact

Sensor technology has enabled the development of portable low-cost monitoring kits that might supplement many applications in conventional monitoring stations. Despite the sensitivity of electrochemical gas sensors to environmental change, they are increasingly important in monitoring polluted microenvironments. The performance of a compact diffusion-based Personal Exposure Kit (PEK) was assessed for real-time gaseous pollutant measurement (CO, O3, and NO2) under typical environmental conditions encountered in the subtropical city of Hong Kong. A dynamic baseline tracking method and a range of calibration protocols to address system performance were explored under practical scenarios to assess the performance of the PEK in reducing the impact of rapid changes in the ambient environment in personal exposure assessment applications. The results show that the accuracy and stability of the ppb level gas measurement is enhanced even in heterogeneous environments, thus avoiding the need for data post-processing with mathematical algorithms, such as multi-linear regression. This establishes the potential for use in personal exposure monitoring, which has been difficult in the past, and for reporting more accurate and reliable data in real-time to support personal exposure assessment and portable air quality monitoring applications.

scholarly journals SOCIAL NETWORKS, HEALTH, AND WELL-BEING AMONG PEOPLE LIVING WITH DEMENTIA

2019 ◽  
Vol 3 (Supplement_1) ◽  
pp. S71-S71
Author(s):  
Eleanor S McConnell ◽  
Kirsten Corazzini ◽  
T Robert Konrad
Keyword(s):  
Older Adults ◽  
Social Networks ◽  
Well Being ◽  
Sensor Technology ◽  
Web Based ◽  
Use Of Technology ◽  
Care Partners ◽  
The Impact ◽  
The Relationship ◽  
Health And Well Being

Abstract Although the impact of dementia on the health and well-being of those living with Alzheimer’s Disease and related Disorders (ADRD) and their care partners has been widely studied, less attention has been paid to how the disease impacts individuals within the context of their larger social networks. This symposium presents findings from a series of integrated studies aimed at strengthening measurement of health and well-being among older adults with living with dementia and well-being among members of their social networks. Findings will be presented from five studies: (1) a scoping review of social network measurement in older adults in chronic illness, including dementia, that emphasizes the use of technology in measuring older adults’ social networks; (2) a simulation study to evaluate the feasibility and reliability of sensor technology to measure social interaction among a person living with dementia and others in their immediate surroundings; (3) development of a web-based application that allows older adults to map and activate their social networks; (4) a qualitative analysis of interviews from persons living with dementia, their unpaid caregivers, and paid caregivers from an adult day health program concerning well-being focused outcomes; and (5) a mixed methods analysis of the feasibility of using both traditional and novel measures of health and well-being deployed among networks of people living with dementia. Emerging technologies for measuring social networks health and well-being hold promise for advancing the study of the relationship-based nature of care for people living with dementia.

scholarly journals MRI Evaluation of Patella Alignment Before and After Anatomical Reconstruction of ACL Undergoing Unified Rehabilitation Programme Introduced by CMC Physical Therapy Team

2014 ◽  
Vol 2 (11_suppl3) ◽  
pp. 2325967114S0014
Author(s):  
Dariusz Straszewski ◽  
Marcin Plenzler ◽  
Joanna Szczepaniak ◽  
Robert Śmigielski ◽  
Beata Ciszkowska-Łysoń ◽  
...  
Keyword(s):  
Patellar Tendon ◽  
Muscle Activation ◽  
Weight Bearing ◽  
Tendon Graft ◽  
Rehabilitation Programme ◽  
Anatomical Reconstruction ◽  
Patella Baja ◽  
Functional Rehabilitation ◽  
Patellar Tendon Graft ◽  
The Impact

Objectives: The aim of the study was to asses the impact of the functional rehabilitation on patella alignment with MRI imaging in patients who underwent the ACL reconstruction. The surgical approach with the use of patellar tendon graft is known to carry the risk of lowering patella height (patella baja), which, in turn, may lead to accelerated cartilage wear in patellofemoral joint. Methods: 30 patients after the anatomical reconstruction of ACL took part in this study (23 male, and 7 female, mean age = 28 ± 10,6 years). During the procedure a patellar tendon graft was used. The Insali-Salvati ratio measured with MRI (images taken pre-procedural, and 9 months after the surgery) was used for the assessment of patellar alignment. The measurements were taken by one radiology specialist on MRI scans in sagittal view in PD sequence. During the examination, patellar joint was in flexion (approx.10 degrees). As the point of reference for patella’s position ISR ratio was in the range of 0.8 - 1.2. All patients were operated on by the same team of surgeons and underwent an unified rehabilitation programme led by a team of selected physiotherapists. The main features of the programme were: an early muscle activation (second day after the procedure); mobilisation of the patella and tissues of the anterior compartment of the knee; weight bearing co-contraction exercises, and the sensomotoric training of the entire kinetic chain of the lower limb. The data recorded was statistically analysed using the Wilcoxon signed-rank test in order to establish parameters’ changes within the study group.. Results: The mean ISR value before the procedure was 0.84 (± 0,1), whereas 9 months after the surgery it was 0.85 (± 0,1). The results’ analysis did not show any statistically significant changes between ISR values. Nine months after the procedure patella baja has not been observed in any of the evaluated patients. Conclusion: The functional rehabilitation programme designed by the CMC team had no negative impact on patella alignment, as no patella baja, which is a common complication after these kinds of surgeries, has been observed. The applied functional rehabilitation programme enabled patients to keep the proper patella alignment, similar to the alignment recorded before the surgery.

scholarly journals AMP-Activated Protein Kinase as a Key Trigger for the Disuse-Induced Skeletal Muscle Remodeling

2018 ◽  
Vol 19 (11) ◽  
pp. 3558 ◽  
Author(s):  
Natalia Vilchinskaya ◽  
Igor Krivoi ◽  
Boris Shenkman
Keyword(s):  
Skeletal Muscle ◽  
Protein Kinase ◽  
Histone Deacetylases ◽  
Molecular Mechanisms ◽  
Weight Bearing ◽  
Mammalian Target Of Rapamycin ◽  
Adenosine Monophosphate ◽  
Chain Gene ◽  
Mtorc1 Signaling ◽  
The Impact

Molecular mechanisms that trigger disuse-induced postural muscle atrophy as well as myosin phenotype transformations are poorly studied. This review will summarize the impact of 5′ adenosine monophosphate -activated protein kinase (AMPK) activity on mammalian target of rapamycin complex 1 (mTORC1)-signaling, nuclear-cytoplasmic traffic of class IIa histone deacetylases (HDAC), and myosin heavy chain gene expression in mammalian postural muscles (mainly, soleus muscle) under disuse conditions, i.e., withdrawal of weight-bearing from ankle extensors. Based on the current literature and the authors’ own experimental data, the present review points out that AMPK plays a key role in the regulation of signaling pathways that determine metabolic, structural, and functional alternations in skeletal muscle fibers under disuse.

scholarly journals Swimming for dementia: An exploratory qualitative study: Innovative practice

Dementia ◽  
2018 ◽  
Vol 18 (2) ◽  
pp. 776-784 ◽  
Author(s):  
Tanya Hobden ◽  
Mary Swallow ◽  
Charlotte Beer ◽  
Tom Dening
Keyword(s):  
Qualitative Study ◽  
Physical Fitness ◽  
Thematic Analysis ◽  
Local Group ◽  
Weight Bearing ◽  
Structured Interviews ◽  
Innovative Practice ◽  
People With Dementia ◽  
The Impact

Swimming is a non-weight bearing form of exercise that can be enjoyable and promote physical fitness. This qualitative study investigated a local group established as part of a national dementia swimming initiative. Semi-structured interviews with people with dementia (N = 4), carers or companions (N = 4) and the organisers and facilitators of the group (N = 6) were analysed using thematic analysis. This revealed four main themes: (1) the pleasure of swimming and its benefits as a form of exercise and for building confidence and empowering participants, (2) the importance of insight and empathy in creating a safe and secure experience, (3) the impact of dementia and (4) how participants valued being part of a group ‘all in the same boat’. ‘Dementia friendly swimming’ appears to be a valuable form of exercise, but it requires considerable preparation and support to make it happen.

scholarly journals On the impact of Citizen Science-derived data quality on deep learning based classification in marine images

PLoS ONE ◽  
2019 ◽  
Vol 14 (6) ◽  
pp. e0218086 ◽  
Author(s):  
Daniel Langenkämper ◽  
Erik Simon-Lledó ◽  
Brett Hosking ◽  
Daniel O. B. Jones ◽  
Tim W. Nattkemper
Keyword(s):  
Deep Learning ◽  
Data Quality ◽  
Citizen Science ◽  
The Impact ◽  
Derived Data

Range Prediction and Trajectory Correction of Long Range Rocket with Attitude Stabilization

2012 ◽  
Vol 232 ◽  
pp. 299-304
Author(s):  
Ke Yong Li ◽  
Fen Fen Xiong ◽  
Cheng Zhang ◽  
Shi Shi Chen
Keyword(s):  
Long Range ◽  
Prediction Method ◽  
Longitudinal Direction ◽  
Control Mode ◽  
Attitude Stabilization ◽  
Large Dispersion ◽  
Range Correction ◽  
And Control ◽  
Range Error ◽  
The Impact

The dispersion of long range rocket is significantly suppressed by the attitude stabilization in the boost phase. However, the attitude stabilization system cannot govern the propellant impulse error and mass error, which induces large dispersion in the longitudinal direction. Therefore, it is necessary to conduct range correction in the post-boost phase of flight trajectory. A range prediction method based on the elliptic ballistic theory is proposed in this paper. Elliptic ballistic equations and range estimation equations are derived and the modified range prediction method with correction factor is presented. It is verified that the proposed method can predict the residual flight range accurately. After that, the lateral pulse jets control is presented and utilized to correct the trajectory and eliminate the range error. A unique control law is reported that combines elliptic ballistic theory and control mode for lateral pulse jets. The impact point is directly controlled and rocket dispersion in the longitudinal direction is efficiently reduced.

The Effect of Pre-Strain and Strain Aging on Properties of X100 Line Pipe

2013 ◽  
Vol 690-693 ◽  
pp. 2270-2274
Author(s):  
Qiu Rong Ma ◽  
Hong Da Chen ◽  
Yan Hua Li ◽  
He Li
Keyword(s):  
Tensile Strength ◽  
Impact Toughness ◽  
Yield Strength ◽  
Tensile Properties ◽  
Aging Temperature ◽  
Strain Aging ◽  
Longitudinal Direction ◽  
Line Pipe ◽  
Toughness Test ◽  
The Impact

Tensile and impact toughness test on X100 line pipe with different pre-strain at different aging temperature were conducted to study the effect of pre-strain and aging temperature on properties of X100 line pipe. The result shows that yield strength and tensile strength of X100 line pipe would increase significantly with the introduction of pre-strain, while the impact toughness would decrease significantly. Effect of strain aging on tensile properties of X100 line pipe are more significantly. The yield strength, and tensile strength would increase significantly with the introduction of strain aging both transversal and longitudinal direction.

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