- 05:36 pm
This study investigated whether using the Abdominal draw-in manoeuvre(ADIM) in combination with ankle dorsiflexion was more effective than using just the ADIM in strengthening the transverse abdominal muscle.
Forty healthy adults were randomly allocated to the experimental or control group. Both groups performed the ADIM under ultrasonic guidance for 30 minutes a day, 5 times a week for a 2 week period with ankle dorsiflexion added to the experimental group. An ultrasonic imaging system was used to assess the muscle thickness and to provide accurate visual feedback during the intervention.
The ADIM was carried out in crook lying and participants were asked to draw in their lower abdomen below the naval gently without moving their abdomen while maintaining a stable neutral pelvic position. The experimental group were then asked to do a 50% maximum voluntary contraction of the ankle dorsiflexors against a fixed ankle strap. Results showed that in the experimental group there was a significant improvement in the thickness of the transverse abdominal muscle compared to the control group.
The authors suggest that these findings imply that ankle dorsiflexion in combination with the ADIM may have produced spatial and temporal summation and selectively activated the transversus abdominus augmenting core stability.
This is an interesting paper that provides some evidence of the effects of enhancing core stability using distal limb activation and there is some useful discussion regarding the theoretical aspects of summation and irradiation.