Dynamometric and Non-Dynamometric Normal Reference values of Trunk Musculature Performance in individuals with different Body Composition

Trunk muscles are very helpful to stipulate continuous effort throughout the day. They are able to slog when they are having sufficient endurance or else it can be able to cause low back pain if the endurance is inadequate. Through the assessment of trunk muscle performance one can easily predict the onset or episodes of low back pain. There is no such evidence which states the normative reference values of Dynamometric and Non-dynamometric tests with respect to different body composition. Dynamometric testing can be done with the help of Back leg chest dynamometer and modified Sorensons method is used for Non-Dynamometric testing of the trunk muscles. Muscle performance testing is very important to check the strength and endurance of trunk musculature so as to determine the deconditioning and plan various rehabilitation approaches accordingly.This study is a cross-sectional study in which male and female healthy participants having age of 19-40 years was recruited for the study. Sampling has been done by Stratified random sampling method. Informed consent was taken from the recruited participants prior to the participation in the study.躯干肌（trunk muscles）对于维持日间持续的躯体肌张力具有重要作用。当躯干肌耐力充足时可维持持续发力状态，若耐力不足则可能引发下腰痛（low back pain）。通过评估躯干肌功能，可有效预测下腰痛的发作与病程。目前尚无针对不同身体成分（body composition）的测力测试（Dynamometric testing）与非测力测试（Non-dynamometric testing）的标准化参考值的相关研究证据。测力测试可通过背腿胸测力计完成，而非测力测试则采用改良索伦森测试法（modified Sorensons method）。肌肉功能评估对于检测躯干肌的力量与耐力、判断其机能减退状态，并据此制定各类康复方案具有重要意义。本研究为横断面研究（cross-sectional study），招募了19-40岁的健康男女受试者；抽样采用分层随机抽样（Stratified random sampling）法；所有招募的受试者在参与研究前均已签署知情同意书（Informed consent）。