The British Journal of Rheumatology, Vol 36, 1075-1081, Copyright © 1997 by British Society for Rheumatology
A Hakkinen, E Malkia, K Hakkinen, I Jappinen, L Laitinen and P Hannonen
The effects of detraining subsequent to strength training on neuromuscular
function were examined in 39 recent-onset rheumatoid arthritis (RA)
patients. Eighteen age- and sex-matched healthy people (H) served as
controls. Patients were randomly allocated either to the experimental group
(PE), who carried out progressive strength training for 6 months, or to the
control group (PC), who maintained only their habitual physical activities.
After 6 months, PE returned to their earlier physical activities and
strength training was terminated. At baseline, the maximal strength of the
trunk extensors (not significant), grip strength and maximal dynamic
strength and the shape of the force-time curve of the knee extensors were
lower in PE and PC (P < 0.05-0.001) than in H. Strength training in PE
led to remarkable increases (P < 0.05-0.001) in the maximal strength of
all muscle groups without changes in the shape of the force-time curve. The
increases in muscle strength in PE obtained by strength training were lost
to a great degree during the detraining period for the isometric trunk
extension (P < 0.01) and flexion (P < 0.01) strength and for the
dynamic knee extension strength (P < 0.05), but not for the grip
strength. In PC, trunk extension and flexion strength decreased
significantly throughout the study period. At the post-test, all the
strength values in both patient groups were much lower than in H. RA is a
chronic disease which seems to need continuous physical exercise with
sufficient intensity to minimize/prevent the loss of muscle strength and
functional capacity.
ORIGINAL PAPERS
Effects of detraining subsequent to strength training on neuromuscular function in patients with inflammatory arthritis
Department of Physiatry, Central Hospital, Jyvaskyla, Finland.
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