Detection of Movement Events of Long-Track Speed Skating Using Wearable Inertial Sensors

Abstract

Inertial measurement units (IMUs) have been used increasingly to characterize long-track speed skating. We aimed to estimate the accuracy of IMUs for use in phase identification of long-track speed skating. Twelve healthy competitive athletes on a university long-track speed skating team participated in this study. Foot pressure, acceleration and knee joint angle were recorded during a 1000-m speed skating trial using the foot pressure system and IMUs. The foot contact and foot-off timing were identified using three methods (kinetic, acceleration and integrated detection) and the stance time was also calculated. Kinetic detection was used as the gold standard measure. Repeated analysis of variance, intra-class coefficients (ICCs) and Bland-Altman plots were used to estimate the extent of agreement between the detection methods. The stance time computed using the acceleration and integrated detection methods did not differ by more than 3.6% from the gold standard measure. The ICCs ranged between 0.657 and 0.927 for the acceleration detection method and 0.700 and 0.948 for the integrated detection method. The limits of agreement were between 90.1% and 96.1% for the average stance time. Phase identification using acceleration and integrated detection methods is valid for evaluating the kinematic characteristics during long-track speed skating.

Measurement of temporal and spatial parameters of ice hockey skating using a wearable system

“…The accuracy of temporal and spatial parameters in skating (on average less than 4% of relative error) in this study was comparable with those reported in gait analysis (less than 2% relative error 29 , 42 ). Also, almost the same accuracy in calculating ST has been obtained compared to the other studies on long-track speed skating (3.6%) 11 . Finally, the accuracy of CT and ST obtained by IMU in this study was comparable with those reported in a previous study on ice skating 15 investigating the accuracy of CT and ST estimated on the real ice (on average, 1% and 2%, respectively).…”

“…However, the application of these instruments is limited since they are not available in every ice rink, and their captured volume is confined to a small part of the ice rink, which can disrupt the natural skating patterns of ice skaters 8 – 10 . Thus, wearable and garment-embedded technologies are preferable for on-ice skating performance assessments 11 – 13 .…”

Effects of Lower Limb Muscle Isometric Strength on the 3000m Skating Speed and Energy Metabolism Characteristics of Chinese Elite Female Speed Skaters

“…According to the survey, world-class speed skating long-distance athletes have a good stamina distribution strategy in the 3000m competition. They have the characteristics of fast starting speed, strong mid-range speed maintenance ability and small back-range speed reduction difference [24][25]. However, most athletes have an elevated level of energy metabolism in the body during the middle and late stages due to the alternation between the anaerobic and aerobic energy supply systems, as well as a signi cant increase in the rate of lower limb work.…”

A Review of Recent Advances in Vital Signals Monitoring of Sports and Health via Flexible Wearable Sensors

“…However, inertial sensors eliminate these limits by wearing them directly on the body. Some studies found that the inertial sensors had a high consistency (>0.9) with the gold standard [ 70 ]. Hence, the motion information obtained by the inertial sensors during training can be applied to evaluate the performances of athletes in training, and provide actionable data for athletes, coaches, and researchers to improve training plans, and equipment.…”