Low bone mineral density
(BMD) in postmenopausal
women is of increasing
concern, especially in relation
to participation in physical
activity. Due to the
availability, affordability, and
benefits experienced, aquatic
exercise has attracted many
populations including
postmenopausal women.
This study aims to address


Twenty women between the ages of
59 to 75 years were included in the
study. The group was divided into
two groups: hydrotraining (n = 10)
and a control (n = 10). All women
were postmenopausal and taking
part in hormone replacement
therapy. The hydrotraining
practitioners followed a specific
training methodology:
Each training session was 20 minutes
of warm up with various exercises with
long lever movements. The main phase
(25 minutes) utilized an interval method
consisting of 4 sets of 30 x 30 seconds
(30 "high with varying intensity jumps
and 30" active rest), called a block.
Between each block, participants
actively recovered for 2 minutes. The
frequency of training consisted of 3
times a week for 12 weeks: 1st week 01
block; 2nd and 3rd - 02 blocks; 4th and
5th - 03 blocks; 6th to 8th - 04 blocks; 9z
and 10 - 03 blocks and 02 blocks 11th and 12th. 
The bone densitometry was
conducted by the Natal Radiology
Institute using a Lunar Prodigy
Advance. Bone mineral density of
the lumbar spine (L1-L4) and total
body BMD was used for data
analysis. A two-way ANOVA was
used for analysis. If the distribution
is abnormal the Mann-Whitney Utest
between groups and the
Wilcoxon test within the group will beused.


The hydrotraining group showed a
significant change in total body BMD
(g/cm2) (Pre Md = 1.00 Q25 – Q75 =
0.89 – 1.09 vs. Post Md = 1.04 Q25 –
Q75 = 0.96 – 1.15; p=0.007) and a
change in the significance threshold
in lumbar spine BMD (g/cm2) (Pre
Md = 1.04 Q25 – Q75 = 0.91 – 1.15
vs. Post Md = 1.06 Q25 – Q75 = 0.94
– 1.18; p=0.06). Such changes were
not observed in the control group.