Bioimpedance Alterations of Knee Site Tissues During Dynamic Activity of Varying Intensity

Abstract

Bioimpedance measurements collected during dynamic activities have alterations compared to static conditions as a result of contraction and relaxation of skeletal muscle. Understanding these effects will be an important consideration for studies collecting this type of data during free-living. In this preliminary trial, 128 kHz knee tissue resistance was collected during 5 walking activities (e.g. treadmill walking and stair climbing) of increasing intensity from a single participant. Mean and maximum resistances were observed to increase with increasing activity, with 1.14 Ω (+1.80%) and 2.03 Ω (+6.48%) mean increases for the highest intensity treadmill walking (compared to the lowest) for the two localized tissue sites, respectively.