TY - JOUR
T1 - Effects of Different Sling Settings on Electromyographic Activities of Selected Trunk Muscles
T2 - A Preliminary Research
AU - Li, Xin
AU - Liu, Howe
AU - Lin, Ke Yu
AU - Miao, Ping
AU - Zhang, Bao Feng
AU - Lu, Song Wei
AU - Li, Le
AU - Wang, Chu Huai
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China under Grant number 81772434 and Technology Program of Guangzhou, China, under Grant number 201704020122
Publisher Copyright:
© 2020 Xin Li et al.
PY - 2020
Y1 - 2020
N2 - Introduction. The supine and prone sling exercise may facilitate activation of the local trunk muscles. Does the side-lying sling exercise activate trunk muscles more easily than the supine and prone training with sling settings? Clinical work has shown that the side-lying sling exercise could reduce pain in patients with unilateral low back pain (LBP), but the mechanism behind it is unclear. The fundamental purpose of this preliminary study was to examine the electromyography (EMG) characteristics of trunk muscles during different sling lumbar settings on sixteen healthy adults. Methods. Amplitude and mean power frequency (MPF) of EMG signals were recorded from the transversus abdominis (TA), rectus abdominis (RA), multifidus (MF), erector spinae (ES), gluteus maximus (Gmax), and gluteus medius (Gmed) muscles while the subjects performed the supine lumbar setting (SLS), prone lumbar setting (PLS), left side-lying lumbar setting (LSLS), and right side-lying lumbar setting (RSLS). Results. During SLS and PLS, TA and MF showed significantly higher activity than RA and ES on the same side, respectively. The EMG activities of ES, TA, MF, Gmax, and Gmed had significant differences between the different sides during LSLS and RSLS, and the dominant-side muscles showed higher activity than the other side. There was no significant difference in core trunk muscles between different sling lumbar settings - only that the SLS of the MF/ES ratio was significantly higher than LSLS and RSLS. Conclusions. Sling exercises can be an effective measure to enhance MF and TA EMG activity, and the side-lying position can increase dominant-side Gmax and Gmed activity. Side-lying sling training does not activate more core muscles than the supine and prone training. Supine and prone exercise should be preferred over SLT to stabilize the lumbar region because of its high local/global muscle ratio.
AB - Introduction. The supine and prone sling exercise may facilitate activation of the local trunk muscles. Does the side-lying sling exercise activate trunk muscles more easily than the supine and prone training with sling settings? Clinical work has shown that the side-lying sling exercise could reduce pain in patients with unilateral low back pain (LBP), but the mechanism behind it is unclear. The fundamental purpose of this preliminary study was to examine the electromyography (EMG) characteristics of trunk muscles during different sling lumbar settings on sixteen healthy adults. Methods. Amplitude and mean power frequency (MPF) of EMG signals were recorded from the transversus abdominis (TA), rectus abdominis (RA), multifidus (MF), erector spinae (ES), gluteus maximus (Gmax), and gluteus medius (Gmed) muscles while the subjects performed the supine lumbar setting (SLS), prone lumbar setting (PLS), left side-lying lumbar setting (LSLS), and right side-lying lumbar setting (RSLS). Results. During SLS and PLS, TA and MF showed significantly higher activity than RA and ES on the same side, respectively. The EMG activities of ES, TA, MF, Gmax, and Gmed had significant differences between the different sides during LSLS and RSLS, and the dominant-side muscles showed higher activity than the other side. There was no significant difference in core trunk muscles between different sling lumbar settings - only that the SLS of the MF/ES ratio was significantly higher than LSLS and RSLS. Conclusions. Sling exercises can be an effective measure to enhance MF and TA EMG activity, and the side-lying position can increase dominant-side Gmax and Gmed activity. Side-lying sling training does not activate more core muscles than the supine and prone training. Supine and prone exercise should be preferred over SLT to stabilize the lumbar region because of its high local/global muscle ratio.
UR - http://www.scopus.com/inward/record.url?scp=85078092795&partnerID=8YFLogxK
U2 - 10.1155/2020/2945952
DO - 10.1155/2020/2945952
M3 - Article
C2 - 31998786
AN - SCOPUS:85078092795
SN - 2314-6133
VL - 2020
JO - BioMed research international
JF - BioMed research international
M1 - 2945952
ER -