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Measuring kinematic variables in front crawl swimming using accelerometers: a validation study.

Callaway AJ - Sensors (Basel) (2015)

Bottom Line: Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete.Four swimmers required individual adaptation to the stroke phase calculation method.The developed algorithm was developed using a search window relative to the body roll (peak/trough).

View Article: PubMed Central - PubMed

ABSTRACT
Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete. The purpose of this study is to use a multiple inertial measurement units to calculate Lap Time, Velocity, Stroke Count, Stroke Duration, Stroke Rate and Phases of the Stroke (Entry, Pull, Push, Recovery) in front crawl swimming. Using multiple units on the body, an algorithm was developed to calculate the phases of the stroke based on the relative position of the body roll. Twelve swimmers, equipped with these devices on the body, performed fatiguing trials. The calculated factors were compared to the same data derived to video data showing strong positive results for all factors. Four swimmers required individual adaptation to the stroke phase calculation method. The developed algorithm was developed using a search window relative to the body roll (peak/trough). This customization requirement demonstrates that single based devices will not be able to determine these phases of the stroke with sufficient accuracy.

No MeSH data available.


Related in: MedlinePlus

Device placement and attachment method and orientation.
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sensors-15-11363-f003: Device placement and attachment method and orientation.

Mentions: Wrist sensors (LW and RW) are placed at the distal end of the Ulna and Radius, with the -Y axis end of the device proximal to the Styloid Process. Arm accelerometers (LA and RA) were placed close to the Olecranon Fossa (elbow). Lower back (LB) sensor was placed at vertebrae L4, in line with the Illiac process. Upper back (UB) was placed on the vertebra T5. These are shown in Figure 3.


Measuring kinematic variables in front crawl swimming using accelerometers: a validation study.

Callaway AJ - Sensors (Basel) (2015)

Device placement and attachment method and orientation.
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4481924&req=5

sensors-15-11363-f003: Device placement and attachment method and orientation.
Mentions: Wrist sensors (LW and RW) are placed at the distal end of the Ulna and Radius, with the -Y axis end of the device proximal to the Styloid Process. Arm accelerometers (LA and RA) were placed close to the Olecranon Fossa (elbow). Lower back (LB) sensor was placed at vertebrae L4, in line with the Illiac process. Upper back (UB) was placed on the vertebra T5. These are shown in Figure 3.

Bottom Line: Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete.Four swimmers required individual adaptation to the stroke phase calculation method.The developed algorithm was developed using a search window relative to the body roll (peak/trough).

View Article: PubMed Central - PubMed

ABSTRACT
Objective data on swimming performance is needed to meet the demands of the swimming coach and athlete. The purpose of this study is to use a multiple inertial measurement units to calculate Lap Time, Velocity, Stroke Count, Stroke Duration, Stroke Rate and Phases of the Stroke (Entry, Pull, Push, Recovery) in front crawl swimming. Using multiple units on the body, an algorithm was developed to calculate the phases of the stroke based on the relative position of the body roll. Twelve swimmers, equipped with these devices on the body, performed fatiguing trials. The calculated factors were compared to the same data derived to video data showing strong positive results for all factors. Four swimmers required individual adaptation to the stroke phase calculation method. The developed algorithm was developed using a search window relative to the body roll (peak/trough). This customization requirement demonstrates that single based devices will not be able to determine these phases of the stroke with sufficient accuracy.

No MeSH data available.


Related in: MedlinePlus