B-38 Free Communication/Poster - Resistance Exercise: JUNE 1, 2011 1:00 PM - 6:00 PM: ROOM: Hall B
Manufacturers of NMES claim that devices provide many of the benefits of conventional exercise regimes with the minimum of effort.
PURPOSE: To evaluate the effect of a 4 week program of NMES upon maximal isometric abdominal curl-up strength and endurance performance.
METHODS: Twenty-eight males (28.6 + 5.3yrs), volunteered for the project. They were split into two matched groups, Exercise v NMES, on the basis of baseline scores on a modified version of the National Coaching Foundation Abdominal Curl Conditioning Test (NCFACCT). The study utilised a cross-over design with each training regime involving 18 sessions of 20 minutes duration over 36 days, with a four week wash-out period between each condition. The NMES device was utilised continuously in each training session at frequencies of 60-100Hz and a pulse width of 420 µS. The Exercise group worked for 50 seconds of each minute for 5 consecutive minutes on each of 4 different exercises. Abdominal strength was measured utilising an isokinetic dynamometer (during 3, 5-second isometric abdominal contractions performed in the form of an abdominal curl-up. Abdominal endurance was measured as total time the participants could maintain the cadence set by the NCFACCT tape.
RESULTS: Peak torque increased by 78.1 Nm following traditional exercise training (p<0.05), whereas following NMES the increase in the same variable was 52.1 Nm (p>0.05). In the wash-out period the decrease following exercise training was greater than that following NMES at 44.3 and 35.5 Nm, respectively Endurance performance was increased by 77.8 seconds following conventional training, compared to an increase of 83.9 seconds after NMES training, both significant, (p<0.05 in both cases). CONCLUSIONS Training and detraining effects of the two training modes were found to be similar. NMES may therefore provide a means of promoting abdominal muscle strength capability for those people in whom traditional training capacity is compromised.