TY - JOUR
T1 - Stride Lengths during Maximal Linear Sprint Acceleration Obtained with Foot‐Mounted Inertial Measurement Units
AU - de Ruiter, Cornelis J.
AU - Wilmes, Erik
AU - van Ardenne, Pepijn S.
AU - Houtkamp, Niels
AU - Prince, Reinder A.
AU - Wooldrik, Maarten
AU - van Dieën, Jaap H.
N1 - Special Issue: Wearable and Integrated Sensors for Sport and Rehabilitation Applications.
Publisher Copyright:
© 2022 by the authors. Licensee MDPI, Basel, Switzerland.
PY - 2022/1/1
Y1 - 2022/1/1
N2 - Inertial measurement units (IMUs) fixed to the lower limbs have been reported to provide accurate estimates of stride lengths (SLs) during walking. Due to technical challenges, validation of such estimates in running is generally limited to speeds (well) below 5 m∙s−1. However, athletes sprinting at (sub)maximal effort already surpass 5 m∙s−1 after a few strides. The present study aimed to develop and validate IMU‐derived SLs during maximal linear overground sprints. Recreational athletes (n = 21) completed two sets of three 35 m sprints executed at 60, 80, and 100% of subjective effort, with an IMU on the instep of each shoe. Reference SLs from start to ~30 m were obtained with a series of video cameras. SLs from IMUs were obtained by double integration of horizontal acceleration with a zero‐velocity update, corrected for acceleration artefacts at touch‐down of the feet. Peak sprint speeds (mean ± SD) reached at the three levels of effort were 7.02 ± 0.80, 7.65 ± 0.77, and 8.42 ± 0.85 m∙s−1, respectively. Biases (±Limits of Agreement) of SLs obtained from all participants during sprints at 60, 80, and 100% effort were 0.01% (±6.33%), −0.75% (±6.39%), and −2.51% (±8.54%), respectively. In conclusion, in recreational athletes wearing IMUs tightly fixed to their shoes, stride length can be estimated with reasonable accuracy during maximal linear sprint acceleration.
AB - Inertial measurement units (IMUs) fixed to the lower limbs have been reported to provide accurate estimates of stride lengths (SLs) during walking. Due to technical challenges, validation of such estimates in running is generally limited to speeds (well) below 5 m∙s−1. However, athletes sprinting at (sub)maximal effort already surpass 5 m∙s−1 after a few strides. The present study aimed to develop and validate IMU‐derived SLs during maximal linear overground sprints. Recreational athletes (n = 21) completed two sets of three 35 m sprints executed at 60, 80, and 100% of subjective effort, with an IMU on the instep of each shoe. Reference SLs from start to ~30 m were obtained with a series of video cameras. SLs from IMUs were obtained by double integration of horizontal acceleration with a zero‐velocity update, corrected for acceleration artefacts at touch‐down of the feet. Peak sprint speeds (mean ± SD) reached at the three levels of effort were 7.02 ± 0.80, 7.65 ± 0.77, and 8.42 ± 0.85 m∙s−1, respectively. Biases (±Limits of Agreement) of SLs obtained from all participants during sprints at 60, 80, and 100% effort were 0.01% (±6.33%), −0.75% (±6.39%), and −2.51% (±8.54%), respectively. In conclusion, in recreational athletes wearing IMUs tightly fixed to their shoes, stride length can be estimated with reasonable accuracy during maximal linear sprint acceleration.
KW - Acceleration
KW - Athletics
KW - IMU
KW - Running
KW - Stride length
KW - Wearables
UR - http://www.scopus.com/inward/record.url?scp=85122109204&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85122109204&partnerID=8YFLogxK
U2 - 10.3390/s22010376
DO - 10.3390/s22010376
M3 - Article
AN - SCOPUS:85122109204
SN - 1424-8220
VL - 22
SP - 1
EP - 11
JO - Sensors
JF - Sensors
IS - 1
M1 - 376
ER -