A new device for measuring lateral abdominal forceKernc, Dejan (Avtor) Strojnik, Vojko (Avtor) Prevc, Petra (Avtor) sportintra-abdominal pressuretransversus abdominislateral abdominal forcevalidityreliabilityA positive relationship between intra-abdominal pressure (IAP) and activation of m. transversus abdominis (TrA) is well established, enabling the non-invasive prediction of IAP from an EMG TrA signal. Since lateral abdominal force (LAF) may also be related to IAP, a new sensor device for measuring LAF was developed to assess IAP. Sixteen participants performed two progressive isometric shoulder flexions to their maximum to induce IAP. The LAF and surface EMG of the TrA muscle were measured. Lateral abdominal force was analysed for reliability and validity regarding the EMG TrA signal. For each individual, correlation coefficients between the EMG TrA and lateral abdominal force sensor (LAFS) signals were significant and ranged from 0.886 to 0.994. In all cases, the EMG TrA signal made a significant contribution (p < 0.001) when predicting the LAFS signal, while the linear prediction of the LAFS signal yielded a small error of estimation. The interclass correlation confirmed consistency between two repetitions. Results provide that the LAFS might estimate IAP in a simple and non-invasive way. The new device also has the potential to detect the start of the increase in IAP before the action, a principle important for lumbar spine protection.20252026-03-11 09:01:16Članek v reviji180552UDK: 796.01ISSN pri članku: 1318-2269DOI: 10.52165/kinsi.31.3.157-169COBISS_ID: 265807875slPodatek o licenci CC BY-SA 4.0 je naveden na pristajalni strani članka (glej zgoraj izvorni URL). (Datum opombe: 17. 3. 2026)