Effects of the Inertia Barbell Training on Lumbar Muscle T2 Relaxation Time

Ming-Yun Sun; Jian-Qiang Lu; Zu-Chang Ma; Jiao-Jiao Lu; Qing Huang; Yi-Ning Sun; Yu Liu

Ayuda

Effects of the Inertia Barbell Training on Lumbar Muscle T2 Relaxation Time

Ming-Yun Sun ^[4] ; Jian-Qiang Lu ^[1] ; Zu-Chang Ma ^[2] ; Jiao-Jiao Lu ^[1] ; Qing Huang ^[3] ; Yi-Ning Sun ^[2] ; Yu Liu ^[1]
1. [1] Shanghai University of Sport
  
  Shanghai University of Sport
  
  China
2. [2] Chinese Academy of Sciences
  
  Chinese Academy of Sciences
  
  China
3. [3] Anqing Normal University
  
  Anqing Normal University
  
  China
4. [4] Institute of Physical Education, Anqing Normal University, Anqing, Chin
Mostrar afiliaciones +
Localización: Journal of strength and conditioning research: the research journal of the NSCA, ISSN 1064-8011, Vol. 34, Nº. 12, 2020, págs. 3454-3462
Idioma: inglés
Texto completo no disponible (Saber más ...)
Resumen
- The purpose of this study was to investigate variations in T2 relaxation time in normal human lumbar muscles caused by inertia barbell training. Thirty undergraduate healthy men (mean age = 19 +/- 1.2 years, body mass = 72 +/- 10.0 kg, and height = 1.78 +/- 0.1 m) were recruited to participate in this study. Subjects were randomly assigned into 2 groups: an inertia barbell training group (IBTG) (n = 15) and a normal barbell-training group (NBTG) (n = 15). All subjects participated in lumbar flexion and extension muscle strength training for 1 hour per time, 3 times per week for a total of 8 weeks. The lumbar area of each subject was scanned before and after the experiment using a 3.0T superconductive magnetic resonance imaging system. The T2 values measured after intervention were significantly different compared with the T2 values measured before the experiment in both the IBTG and NBTG groups (p < 0.001). After intervention, there was no significant difference in T2 values between the IBTG and NBTG groups (p = 0.17). The ([INCREMENT]T2)/T2 percentage was significantly different in the IBTG group (p < 0.01). This study demonstrated that 8 weeks of strength training led to significant improvements in the values for T2 relaxation time of the lumbar muscles. Furthermore, the ([INCREMENT]T2)/T2 percentage for IBTG was higher than that for NBTG, which suggested that lumbar muscle activity increased more with inertial barbell training.