Article

Isometric training of the abdominal muscles is often recommended in programs of primary or secondary prevention for low-back pain In this study 20 male workers with 2-18 years' history (average 5,5 years) of low-back pain without sciatica went through intense isometric abdominal muscle training for 5 weeks. Before and after training the subjects had trunk flexion and extension strength tests and a series of standardized lifts. The intra-abdominal pressure (IAP) and the EMG activity of the oblique abdominal muscles and of the erector spinae muscle were recorded. It was found that :
1. The strength of the abdominal muscles increased,
2. The increased strength was correlated to an improved recruitment of motor units in the oblique abdominal muscles,
3. The EMG activity of the oblique abdominal muscles when lifting decreased after training, i.e. the acquired ability to recruit more motor units was not made use of, 4. The IAP at lifting was generally not affected. A better knowledge of the mechanisms responsible for the IAP in different situations is needed to support advice on training or other prevention.

Langue : ANGLAIS

Identifiant basis : 1985001463