Accuracy of PARTwear Inertial Sensor and Optojump Optical Measurement System for Measuring Ground Contact Time During Running

Ammann, Rahel; Taube, Wolfgang; Wyss, Thomas

doi:10.1519/jsc.0000000000001299

Cited by 33 publications

(55 citation statements)

References 37 publications

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“…There were no significant gait asymmetries when comparing GCTs of dominant and nondominant leg (P = .098) in the noninjured group, whereas in the previously injured group the GCTs of the injured side were significantly longer than the GCTs of the noninjured side (P < .001). The reported Borg values after the end of each session were on average 17.9 (range [16][17][18][19][20], indicating very hard to extremely hard exertion. Buildup of fatigue was therefore expected.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Gait Asymmetry During 400- to 1000-m High-Intensity Track Running in Relation to Injury History

Gilgen-Ammann¹,

Taube²,

Wyss³

2017

International Journal of Sports Physiology and Performance

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Purpose: To quantify gait asymmetry in well-trained runners with and without previous injuries during interval training sessions incorporating different distances. Methods: Twelve well-trained runners participated in 8 high-intensity interval-training sessions on a synthetic track over a 4-wk period. The training consisted of 10 × 400, 8 × 600, 7 × 800, and 6 × 1000-m running. Using an inertial measurement unit, the ground-contact time (GCT) of every step was recorded. To determine gait asymmetry, the GCTs between the left and right foot were compared. Results: Overall, gait asymmetry was 3.3% ± 1.4%, and over the course of a training session, the gait asymmetry did not change (F 1,33 = 1.673, P = .205). The gait asymmetry of the athletes with a previous history of injury was significantly greater than that of the athletes without a previous injury. However, this injuryrelated enlarged asymmetry was detectable only at short (400 m), but not at longer, distances (600-1000 m). Conclusion: The gait asymmetry of well-trained athletes differed, depending on their history of injury and the running distance. To detect gait asymmetries, high-intensity runs over relatively short distances are recommended.Keywords: imbalance, field condition, fatigue, inertial measurement unit, high performance Athletes and coaches assume that gait asymmetry affects athletic performance, as 1 of the lower limbs is exposed to more stress than the other. 1,2 Gait asymmetry can be the primary cause of an injury and it can be responsible for an injury. 1,3,4 Previously, gait asymmetries ranging from 3% for knee angle at touchdown to 54% for hip-angle velocity were reported in female runners, 5,6 suggesting that a single threshold level of normal to problematic gait asymmetry does not exist and that there are wide variations in gait mechanics and asymmetries. 1,18 Also, gait asymmetry may not be evident at the beginning of a race but may emerge with fatigue. Regarding injury history, some earlier studies of athletes with and without a previous injury found no differences in gait asymmetry. 1,7,8 However, all the subjects in the aforementioned studies were either novice runners, 7 the assessments took place in a laboratory setting (on a treadmill) at submaximal speeds only, 1,7-9 and only 1 trial 10 or a few gait cycles 9 were analyzed. Consequently, it is unclear whether these results are congruent with real practice during training or competition on realistic floor conditions. For instance, a previous study provided evidence that gait asymmetry is reduced on a treadmill. 11 Hence, to better understand the occurrence of gait asymmetry, data from well-trained runners over entire runs over various distances, at high speeds, and at high intensities need to be obtained in field measurements.The purpose of this study therefore was threefold: to quantify gait asymmetry in healthy well-trained runners during high-intensity track runs of different lengths and speeds (400-1000 m), to evaluate the effect of an injury in the previous 24 months on gait as...

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Section: Resultsmentioning

confidence: 99%

“…A previous study demonstrated the validity and reliability of the device in the measurement of GCTs. 17 This method is feasible in field conditions in entire groups to gain insight into gait asymmetries, unlike other methods that rely on, for example, the braking impulse or joint angles, which are much more difficult to assess.…”

Section: Methodsmentioning

confidence: 99%

Gait Asymmetry During 400- to 1000-m High-Intensity Track Running in Relation to Injury History

Gilgen-Ammann¹,

Taube²,

Wyss³

2017

International Journal of Sports Physiology and Performance

Self Cite

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“…These studies differ in terms of sensor configuration, sensor location, and type of parameter measured [1]. Several groups have used inertial sensors in sprint running to characterize temporal parameters [2][3][4], body-segment orientation [5,6], ground reaction forces [7,8], and speed [9][10][11]. Surprisingly, only a few studies used MIMU to quantify spatiotemporal parameters in hurdle races.…”

Section: Introductionmentioning

confidence: 99%

Hurdle Clearance Detection and Spatiotemporal Analysis in 400 Meters Hurdles Races Using Shoe-Mounted Magnetic and Inertial Sensors

Falbriard

Mohr

Aminian

2020

Sensors

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This research aimed to determine whether: (1) shoe-worn magnetic and inertial sensors can be used to detect hurdle clearance and identify the leading leg in 400-m hurdles, and (2) to provide an analysis of the hurdlers’ spatiotemporal parameters in the intervals defined by the hurdles’ position. The data set is composed of MIMU recordings of 15 athletes in a competitive environment. The results show that the method based on the duration of the flight phase was able to detect hurdle clearance and identify the leading leg with 100% accuracy. Moreover, by combining the swing phase duration with the orientation of the foot, we achieved, in unipedal configuration, 100% accuracy in hurdle clearance detection, and 99.7% accuracy in the identification of the leading leg. Finally, this study provides statistical evidence that contact time significantly increases, while speed and step frequency significantly decrease with time during 400 m hurdle races.

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“…In addition, SL was quantified as the distance between the two GCT measured. The reliabi lity of the Optojump optical measurement system for measuring GCT and SL has been reported elsewhere [1,32]. Before the RSA test, players executed a standardised warm-up consisting of a 5 min low intensity run, 3 × 20 m progressive accelerations and a maximal 10 m sprint, separated by a 3 min rest.…”

Section: Repeated Sprint Ability (Rsa) Testmentioning

confidence: 99%

Effects of Resistance Training and Combined Training Program on Repeated Sprint Ability in Futsal Players

et al. 2018

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The purpose of this study was to compare the effects of 6 weeks resistance training (RT) with combined RT and loaded change of direction (CD) exercise on muscle strength and repeated sprint ability (RSA) in futsal players. Thirty-four players (age: 23.7±4.1 years; height: 1.77±0.06 m; body mass: 74.1±8.2 kg) were randomly assigned into three groups: full squat group (SG, n=12), combined full squat and CD group (S+CDG, n=12), and control group (CG, n=10). The RT for SG consisted of full squat with low-load (~45-60% 1RM) and low-volume (2-3 sets and 4-6 repetitions), whereas the S+CDG performed the same RT program combined with loaded CD (2-5 sets of 10 s). Estimated one-repetition maximum (1RM) and variables derived from RSA test including mean sprint time (RSA), best sprint time (RSA), percent sprint decrement (S), mean ground contact time (GCT) and mean step length (SL) were selected as testing variables. Changes in sprint time and GCT in each sprint were also analysed. Both experimental groups showed significant (P<0.05-0.001) improvements for 1RM, RSA and first and second sprint time. In addition, S+CDG achieved significant (P<0.05-0.001) improvements in RSA sprint time (from fifth to ninth sprint) and GCT (from third to eighth sprint). These results indicate that only 6 weeks of low-load and low-volume RT combined with CD in addition to routine futsal training is enough to improve RSA and strength performance simultaneously in futsal players.

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Accuracy of PARTwear Inertial Sensor and Optojump Optical Measurement System for Measuring Ground Contact Time During Running

Cited by 33 publications

References 37 publications

Gait Asymmetry During 400- to 1000-m High-Intensity Track Running in Relation to Injury History

Gait Asymmetry During 400- to 1000-m High-Intensity Track Running in Relation to Injury History

Hurdle Clearance Detection and Spatiotemporal Analysis in 400 Meters Hurdles Races Using Shoe-Mounted Magnetic and Inertial Sensors

Effects of Resistance Training and Combined Training Program on Repeated Sprint Ability in Futsal Players

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