is moderate-to-vigorous physical activity or steps per day more related to adiposity?
TRANSCRIPT
Aleš Gába, Ph.D.
Czech Republic
Palacký University, Olomouc
Is moderate-to-vigorous
physical activity or steps
per day more related to
adiposity in a sample of Czech children?
Gába A., Mitáš J., Jakubec L., Dygrýn J., & Botek M.
What do know?
<20%
13–15 years old doing recommended amount of MVPA
The Lancet, Series on PA; Hallal et al., 2012
More than 40 million children <5 years old were
overweight in 2011 (WHO, 2014).
Overweight and obesity is preventable.
PA in children is sporadic (Hallal et al., 2012) and
decline during childhood (Eder et al., 2008).
PA recommendations
Negative association between PA and body fatness
in children (Ness et al., 2007).
How much PA is necessary to prevent overweight
and obesity during childhood?
60min/dayin MVPA
Intensity of PA Steps per day
11,00013,000Tudor-Locke et al., 2011
Aim of the study
The aim of our study was to find out whether MVPA
or steps per day are more associated with overall
and visceral adiposity depending on the gender.
MVPA
Steps/day
Fat mass
Visceral adipose tissue
Methods
392 children aged 7–12 years
6 schools in the Moravian region
All parents were informed about study protocol and
signed written consent.
Body composiotion
FM and VAT
MF-BIA (InBody 720; 1–1,000 kHz)
MF-BIA is valid method in children and
adolescents (Haroun et al., 2009; Lim et al.,
2009)
Methods
Physical activity
MVPA, steps/day
ActiGraph GT3X
7 consecutive days
April–June, September–November
Inclusion criterion: at least 10 hours recorded PA
per day
36%64%
N=26345%55%
N=392
Results
Girls
N=152
Boys
N=111 Difference P-value
Mean ± SD Mean ± SD
Age, years 10.1 ± 1.2 10.1 ± 1.1 0 0.99
Height, cm 143.7 ± 8.7 143.7 ± 9.2 0 0.87
Weight, kg 37.1 ± 9.3 38.0 ± 10.0 0.9 0.54
BMI, kg/m2 17.7 ± 3.0 18.1 ± 3.2 0.4 0.32SD – standard deviation, N – number of participantsBMI – body mass index, PA – physical activity, MVPA – moderate to vigorous physical activity*P<0.05, difference between genders was significant, Mann-Whitney test
Age: 10.1 years, height: 143.7 cm, weight: 37.4
kg, BMI: 17.9 kg/m2
21%overweight or obese
19.1%
24.3%
Results
0
60
120
0 11000
MVPA
, m
in/d
ay
Steps per day
94%<60 min/day in MVPA
83%<11 000 steps/day
5%achieve recommended amount
of MVPA and steps/day
N=152
0
60
120
0 13000
MVPA
, m
in/d
ay
Steps per day
Results
93%<60 min/day in MVPA
88%<13 000 steps/day
5%achieve recommended amount
of MVPA and steps/day
N=111
Results
Girls
N=152
Boys
N=111 Difference P-value
Mean ± SD Mean ± SD
Fat mass, kg 7.6 ± 5.0 7.2 ± 5.7 –0.4 0.10
Fat mass, % 19.1 ± 8.1 17.0 ± 9.0 2.1* 0.02
Fat-free mass, kg 29.4 ± 5.4 30.8 ± 5.6 –1.4* 0.03
Visceral adipose tissue, cm2 34.7 ± 26.0 37.6 ± 30.9 2.9 0.77
MVPA, min/day 31.8 ± 14.7 37.4 ± 16.8 5.6* <0.01
Light PA, min/day 93.8 ± 25.1 111.5 ± 39.3 17.7 0.11
Sedentary time, min/day 349.3 ± 63.2 329.2 ± 62.0 20.1* <0.01
Number of steps, steps/day 9 082 ± 2 313 9 386 ± 2 784 304 0.53
SD – standard deviation, N – number of participantsBMI – body mass index, PA – physical activity, MVPA – moderate to vigorous physical activity*P<0.05, difference between genders was significant, Mann-Whitney test
Girls had significantly more FM% and sedentary time
than boys.
Boys had significantly more FFM and MVPA than girls.
Results
0
5
10
15
20
25
30
35
40
45
50
0 20 40 60 80 100 120
Fat m
ass
, %
MVPA, min/day
Girls Boys
0
20
40
60
80
100
120
140
160
0 20 40 60 80 100 120
Vis
cera
l adip
ose
tis
sue, cm
2
MVPA, min/day
Girls Boys
ResultsGirls Boys
FM% –0.26* –0.13
VAT –0.25* –0.15FM – Fat mass, VAT – visceral adipose tissue*P<0.05, Spearman's correlation coefficient
ResultsGirls Boys
FM% –0.14 –0.11
VAT –0.17* –0.14FM – Fat mass, VAT – visceral adipose tissue*P<0.05, Spearman's correlation coefficient
Results
0
5
10
15
20
25
30
35
40
45
50
2000 7000 12000 17000
Fat m
ass
, %
Steps/day
Girls Boys
0
20
40
60
80
100
120
140
160
2000 7000 12000 17000
Vis
cera
l adip
ose
tis
sue, cm
2
Steps/day
Girls Boys
Conclusions
21% of children were overweight or obese.
PA was sporadic.
6.5% of children performed more than 60
min/day in MVPA.
14.8% of children accumulated recommended
amount of steps/day.
Negative and gender-specific association
between PA and body fatness.
