Stroke phase discrimination in 1500m front crawl swimming using a tri-axial inertial sensor device. Pilot study of sensor validity

2017 ◽  
Vol 20 ◽  
pp. e66
Author(s):  
Y. Baba ◽  
D. Saro ◽  
H. Ichikawa ◽  
H. Shimojo ◽  
Y. Ikeda ◽  
...  
Keyword(s):  
Pilot Study ◽  
Inertial Sensor ◽  
Front Crawl ◽  
Phase Discrimination ◽  
Sensor Device

scholarly journals Validity and Reliability of an Inertial Sensor Device for Specific Running Patterns in Soccer

Sensors ◽  
2021 ◽  
Vol 21 (21) ◽  
pp. 7255
Author(s):  
Guglielmo Pillitteri ◽  
Ewan Thomas ◽  
Giuseppe Battaglia ◽  
Giovanni Angelo Navarra ◽  
Antonino Scardina ◽  
...  
Keyword(s):  
Inertial Sensor ◽  
Team Sports ◽  
Young Male ◽  
Validity And Reliability ◽  
Professional Soccer ◽  
Sensor Device ◽  
Significant Difference ◽  
The Difference ◽  
Gps System ◽  
Tracking Devices

Electronic performance tracking devices are largely employed in team sports to monitor performance and improve training. To date, global positioning system (GPS) based devices are those mainly used in soccer training. The aim of this study was to analyse the validity and reliability of the inertial sensor device (ISD) in monitoring distance and speed in a soccer-specific circuit and how their performance compare to a GPS system. 44 young male soccer players (age: 14.9 ± 1.1, range 9–16, years, height: 1.65 ± 0.10 m, body mass: 56.3 ± 8.9 kg) playing in a non-professional soccer team in Italy, participated in the study. We assessed the players trough a soccer running sport-specific circuit. An ISD and a GPS were used to assess distance and speed. Data was compared to a video reference system, and the difference were quantified by means of the root mean square error (RMSE). Significant differences were found for both GPS and ISD devices for distance and speed. However, lower error for distance (dRMSE 2.23 ± 1.01 m and 5.75 ± 1.50 m, respectively) and speed (sRMSE 0.588 ± 0.152 m·s–1 and 1.30 ± 0.422 m·s–1, respectively) were attained by the ISD compared to the GPS. Overall, our results revealed a statistically significant difference between systems in data monitoring for either distance and speed. However, results of this study showed that a smaller error was obtained with the ISD than the GPS device. Despite caution is warranted within the interpretation of these results, we observed a better practical applicability of the ISD due to its small size, lower cost and the possibility to use the device indoor.

scholarly journals Concurrent Validity of Inertially Sensed Measures during Voluntary Body Sway in Silence and while Exposed to a Rhythmic Acoustic Stimulus: A Pilot Study

2021 ◽  
pp. 65-73
Author(s):  
Analina Emmanouil ◽  
Elissavet Rousanoglou ◽  
Anastasia Georgaki ◽  
Konstantinos Boudolos
Keyword(s):  
Pilot Study ◽  
Gold Standard ◽  
Concurrent Validity ◽  
Inertial Sensor ◽  
Acoustic Stimulus ◽  
Force Plate ◽  
Body Sway ◽  
Positive Contribution ◽  
Acoustic Stimuli ◽  
Stimulus Effect

<b><i>Introduction:</i></b> The effect of rhythmic acoustic stimuli on body sway is of increasing interest due to their positive contribution when training or restoring the control of movement. Inertial sensors show promise as a portable, easier, and more affordable method compared to the force plate “gold standard” concerning the evaluation of postural sway. This study examined the concurrent validity of inertially sensed measures of voluntary body sway against those obtained with a force plate, in silence and while exposed to a rhythmic acoustic stimulus. <b><i>Methods:</i></b> Temporal (sway duration and variability) and spatial (trajectory length, variability, range, velocity, and area) body sway variables were extracted using an inertial sensor (at L5) in synchronization with a force plate, during anteroposterior body sway in silence and while exposed to a rhythmic acoustic stimulus (<i>n</i> = 18 young women; two 70-s trials in each condition). Statistics included bivariate correlations between the inertially sensed and the force plate measures, separately, in silence and with a rhythmic acoustic stimulus, as well as for the effect of the rhythmic acoustic stimulus (percentage difference from silence) (<i>p</i> ≤ 0.05, SPSS v25.0). <b><i>Results:</i></b> The inertially sensed measures demonstrated good-to-excellent concurrent validity for all temporal and almost all spatial variables, both in silence and with rhythmic acoustic stimulus (<i>r</i> &#x3e; 0.75, <i>p</i> = 0.000), as well as for the rhythmic acoustic-stimulus effect (<i>r</i> &#x3e; 0.75, <i>p</i> ≤ 0.05). <b><i>Conclusion:</i></b> The inertially sensed measures of the voluntary anteroposterior body sway demonstrated an overall good-to-excellent concurrent validity against those obtained with the force plate “gold standard,” both in the silence and the rhythmic acoustic stimulus conditions, as well as for the rhythmic acoustic-stimulus effect. The findings of this pilot study allow the recommendation of inertial sensing for the evaluation of postural control alterations when exposed to rhythmic acoustic stimuli, a condition of increasing interest due to the positive contribution of such stimuli when training or restoring the control of movement.

Stroke phase discrimination in breaststroke swimming using a tri-axial acceleration sensor device

2003 ◽  
Vol 6 (2) ◽  
pp. 113-123 ◽  
Author(s):  
Yuji Ohgi ◽  
Hiroshi Ichikawa ◽  
Masanobu Homma ◽  
Chikara Miyaji
Keyword(s):  
Acceleration Sensor ◽  
Phase Discrimination ◽  
Sensor Device ◽  
Axial Acceleration

scholarly journals A Pilot Study Combining a GC-Sensor Device with a Statistical Model for the Identification of Bladder Cancer from Urine Headspace

PLoS ONE ◽  
2013 ◽  
Vol 8 (7) ◽  
pp. e69602 ◽  
Author(s):  
Tanzeela Khalid ◽  
Paul White ◽  
Ben De Lacy Costello ◽  
Raj Persad ◽  
Richard Ewen ◽  
...  
Keyword(s):  
Bladder Cancer ◽  
Pilot Study ◽  
Statistical Model ◽  
Sensor Device

Pilot study on criteria in cavity preparation-facts or artifacts?

1973 ◽  
Vol 37 (11) ◽  
pp. 27-31 ◽  
Author(s):  
G Salvendy ◽  
WM Hinton ◽  
GW Ferguson ◽  
PR Cunningham
Keyword(s):  
Pilot Study ◽  
Cavity Preparation

Assessing manual dexterity: pilot study of a new instrument

1981 ◽  
Vol 45 (2) ◽  
pp. 71-73 ◽  
Author(s):  
P Weinstein ◽  
HA Kiyak
Keyword(s):  
Pilot Study ◽  
Manual Dexterity ◽  
New Instrument
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