Br J Sports Med
2005;39:776-780
doi:10.1136/bjsm.2005.019117
- Original article / Fatouros et al
Abstract
Background:
Although strength training (ST) enhances physical function in the
elderly, little is known about the effect of training intensity
on training and detraining adaptations
in musculoskeletal fitness.
Objective:
To determine the effect of exercise intensity on strength, anaerobic power, and mobility of older men subjected to a 24 week
ST protocol followed by prolonged detraining.
Methods:
Fifty two healthy but inactive older men (mean (SD) age 71.2 (4.1)
years) were assigned to a control (n = 14), low intensity
training (LIST; n = 18; 55% 1RM), or
high intensity training (HIST; n = 20; 82% 1RM) group. They carried
out a 24 week,
whole body (10 exercises, two to three
sets/exercise) ST programme followed by a 48 week detraining period.
Upper and lower
body strength, anaerobic power (Wingate
testing), and mobility (timed up and go, walking, climbing stairs) were
measured at
baseline and immediately after training
and during detraining.
Results:
Although low intensity training improved (p<0.05) strength (42–66%),
anaerobic power (10%), and mobility (5–7%), high intensity
training elicited greater (p<0.05)
gains (63–91% in strength, 17–25% in anaerobic power, 9–14% in
mobility). All training
induced gains in the LIST group had
been abolished after four to eight months of detraining, whereas in the
HIST group strength
and mobility gains were maintained
throughout detraining. However, anaerobic power had returned to baseline
levels after four
months of detraining in both groups.
Conclusions:
Higher intensity training protocols induce greater gains in strength,
anaerobic power, and whole body physical function of
older men. Moreover, higher intensity
training may maintain the gains for more prolonged periods after
training ceases.
Quelle: http://bjsm.bmj.com/content/39/10/776.short
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