ARTICLE –
abstractCorrelation
of strength, BMI and limb girth to bone mineral density in
young adults with different levels of physical activity Ravi Raghuvanshi1, Jagdeep Singh2 1Department of Sports Medicine and Physiotherapy, Guru Nanak Dev University, Amritsar, Punjab, India 2Department of Physical Education (AT), Guru Nanak Dev University, Amritsar, Punjab, India
Abstract
The aim of
the study is to assess the association of strength and body mass index
(BMI) to bone mineral density (BMD) in young adults with different
levels of physical activity. Total of thirty young adults,, aged 25-30
years were recruited by advertising. Bone specific physical activity
questionnaire (BPAQ) was used to measure the physical activity score.
BMD of mid shaft tibia and distal radius of dominant limb was taken
using ultrasound densitometry. Speed of sound (SOS) was measured for
both the sites and Z-score was documented. Concentric quadriceps peak
torque of dominant limb was measured in using a kinetech isokinetic
dynamometer. Hand grip strength of dominant hand was measured using
digital hand grip dynamometer. Bivariate correlation between both BMD
sites and normalized quadriceps strength at 60)/sec, hand grip
strength, BPAQ score, BMI, wrist circumference and bi-malleolar girth
for different age groups were calculated using Pearson’s
coefficient of correlation. Physical activity and strength were found
to be independent significant predicators of BMD, also BMI was found to
be in positive correlation with bone health. Together these results
clearly conclude that bone specific physical activity is an important
determinant of BMD after and even before the peak bone mass attainment
in young adults of different age groups. In the present study, we have
only evaluated BMD of the radius and mid shaft tibia. This measure
might be biased from the occupation or the amount of physical activity
of a particular limb. Considering these facts we suggest that strength
can be a good predictor of BMD at the time of peak bone mass attainment
but not before that, on the contrary physical activity is significant
predictor of BMD irrespective of age
Key
words:bone mass, hand grip strength, body mass index
Full
article:
Correlation of strength, BMI and limb girth to bone mineral density in young adults with different levels of physical activity
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