TY - JOUR
T1 - Do Swimmers Conform to Criterion Speed during Pace-Controlled Swimming in a 25 m Pool Using a Visual Light Pacer?
AU - Gonjo, Tomohiro
AU - McCabe, Carla
AU - Coleman, Simon
AU - Soare, Susana
AU - Fernandes, Ricardo J.
AU - Vilas-Boas, João Paulo
AU - Sanders, Ross
PY - 2019/3/20
Y1 - 2019/3/20
N2 - The purpose of this study was to investigate whether swimmers follow the instructed speed (v
target ) accurately with the aid of a commercial visual light pacer during front crawl and backstroke swimming in a 25 m pool. Ten male swimmers performed 50 m front crawl and backstroke at different speeds (controlled by a visual light pacer) in a 25 m pool. The mean speed during the 50 m swimming (v
S ) was quantified from the time measured by a stopwatch. The mean speed of the centre of mass during a stroke cycle in the middle of the pool (v
COM ) was calculated from three-dimensional coordinates obtained from Direct Linear Transformation of two-dimensional digitised coordinates of 19 segment endpoints for each of six cameras. Swimmers achieved accurate v
S in front crawl and backstroke (ICC = 0.972 and 0.978, respectively). However, v
COM for the single mid-pool sample had lower correlations with v
target (ICC = 0.781 and 0.681, respectively). In backstroke, v
COM was slower by 4.1–5.1% than v
target . However, this was not the case in front crawl (1.0–2.7%). With the use of a visual light pacer, swimmers can achieve accurate mean speed overall but are less able to achieve the target speed stroke by stroke.
AB - The purpose of this study was to investigate whether swimmers follow the instructed speed (v
target ) accurately with the aid of a commercial visual light pacer during front crawl and backstroke swimming in a 25 m pool. Ten male swimmers performed 50 m front crawl and backstroke at different speeds (controlled by a visual light pacer) in a 25 m pool. The mean speed during the 50 m swimming (v
S ) was quantified from the time measured by a stopwatch. The mean speed of the centre of mass during a stroke cycle in the middle of the pool (v
COM ) was calculated from three-dimensional coordinates obtained from Direct Linear Transformation of two-dimensional digitised coordinates of 19 segment endpoints for each of six cameras. Swimmers achieved accurate v
S in front crawl and backstroke (ICC = 0.972 and 0.978, respectively). However, v
COM for the single mid-pool sample had lower correlations with v
target (ICC = 0.781 and 0.681, respectively). In backstroke, v
COM was slower by 4.1–5.1% than v
target . However, this was not the case in front crawl (1.0–2.7%). With the use of a visual light pacer, swimmers can achieve accurate mean speed overall but are less able to achieve the target speed stroke by stroke.
KW - aquatic locomotion
KW - backstroke
KW - front crawl
KW - pacing
UR - http://www.scopus.com/inward/record.url?scp=85063147656&partnerID=8YFLogxK
UR - https://www.research.ed.ac.uk/portal/en/publications/do-swimmers-conform-to-criterion-speed-during-pacecontrolled-swimming-in-a-25-m-pool-using-a-visual-light-pacer(ce67ced9-52dd-451e-8ce6-702d0eaf3f71).html
UR - https://pure.ulster.ac.uk/en/searchAll/index/?search=71294806&pageSize=25&showAdvanced=false&allConcepts=true&inferConcepts=true&searchBy=PartOfNameOrTitle
U2 - 10.1080/14763141.2019.1572781
DO - 10.1080/14763141.2019.1572781
M3 - Article
C2 - 30893017
SN - 1476-3141
JO - Sports Biomechanics
JF - Sports Biomechanics
ER -