17th Annual ECSS-Congress, Bruges 2012

Abstract details

Abstract-ID: 778
Session: [CP-PM10] Strength training
Lecture room:
Date & time: 07.07.2017 / -
Title of the paper: BIOMECHANICAL MUSCLE PHYSIOLOGY MUSCLE QUALITY AND ITS INFLUENCE ON STRENGTH CAPACITY IN SPINE AND THIGH MUSCLES
Authors: Inhuber, S.1, Kreuzpointner, F.1, Baum, T.2, Schwirtz, A.1
Institution: Technical University of Munich
Department: 1. Department of Sport and Health Sciences; 2. Department of Diagnostic and Interventional Radiology
Country: Germany
Abstract text Background Lots of body fat means a high prevalence of diseases and physical limitations. Many investigations were conducted to point out the characteristics and physical effects of different kinds of body fat on health and body function. Concerning physical limitations, studies confirm the negative influence of intramuscular fat infiltrations (IMAT) on musculoskeletal structures (Kumar et al., 2014). Some radiological investigations state a conspicuous high fatty infiltration (IMAT) in spine muscles and a relation to pain/disability and structural abnormalities in the lumbar spine (Dahlqvist et al., 2014; Teichtahl et al., 2015). There is a lack of knowledge whether this high value of IMAT in spine muscles affects the strength capacity as well as the overall muscle function. Purpose The particular aim of the study is to investigate, whether or not there is a significant relationship between intramuscular fat and the strength of the muscle (Maffiuletti et al., 2008). The present results of a case-by-case based pilot study (Baum et al., 2016) show remarkable tendencies and form the basis for this pending research project. Methods 30 healthy subjects (n=15 male; n=15 female) aged from 20 to 40 with a wide range of BMI (23-30 kg/m2) and an average physical activity (<4h/week) will participate in the measurements. Muscle composition, muscle volume, anatomical cross-sectional area (ACSA) and intramuscular adipose tissue (IMAT) are determined by using quantitative MR-imaging. Muscle function, especially the actual maximum voluntary contraction (MVC), is measured with a rotational dynamometer (Isomed2000): Maximum isometric torque (Nm) of trunk extension and flexion is taken in a 90-sitting-position. To get more specific fundamental background information, the same parameters or even more are going to be investigated by quantifying the IMAT as well as measuring the MVC (60-knee flexion angle) and additionally by using the ultrasound to determine the physical cross-sectional area (PCSA) of the quadriceps muscle. Outlook A feasible correlation could be used in clinical application, e.g. as one assistant detail to improve the diagnostic imaging of patients with low back pain, as well as in applied sport science as a starting point to examine the effects of different types of training on the muscle quality, more specifically on the strength-fat-relation. References Baum, T et al. (2016). J Comput Assist Tomogr, 40(3), 447-451. Dahlqvist, JR et al. (2014). Neurology, 83(13), 1178-1183. Kumar, D et al. (2014). Osteoarthritis Cartilage, 22(2), 226-234. Maffiuletti, NA et al. (2008). Eur J Appl Physiol, 103(4), 481-484. Teichtahl, AJ et al. (2015). Spine J, 15(7), 1593-1601.
Topic: Physiology
Keyword I: muscle quality
Keyword II: fatty infiltration
Keyword III: strength