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. Author manuscript; available in PMC: 2021 Apr 1.
Published in final edited form as: J Sci Med Sport. 2019 Nov 1;23(4):385–389. doi: 10.1016/j.jsams.2019.10.017

Table 3.

Results from Repeated Measures Linear Regression Analysis of Sport Participation and Physical Activity from 7th to 9th Grade by Sex.

Males (n=122)
Physical Activity (min/hr) Sport Participants Non-Participants Sport Participation Grade
7th Grade
(n=93)
9th Grade
(n=45)
7th Grade
(n=29)
9th Grade
(n=46)
d p-value d p-value
Total Physical Activity 24.5 (0.6) 22.1 (0.8) 22.3 (1.0) 19.8 (0.8) 0.40 0.006 −0.45 0.001
MVPA 3.4 (0.3) 2.4 (0.4) 2.3 (0.4) 2.2 (0.3) 0.33 0.007 −0.16 0.001
Sedentary 35.6 (0.6) 38.5 (0.7) 37.7 (0.9) 41.0 (0.7) −0.46 0.003 0.89 <0.0001
Females (n=184)
Physical Activity (min/hr) Sport Participants Non-Participants Sport Participation Grade
7th Grade
(n=134)
9th Grade
(n=52)
7th Grade
(n=50)
9th Grade
(n=77)
d p-value d p-value
Total Physical Activity 22.0 (0.4) 19.2 (0.6) 20.6 (0.6) 17.6 (0.5) 0.33 0.006 −0.71 <0.0001
MVPA 2.0 (0.1) 1.1 (0.2) 1.6 (0.2) 1.0 (0.1) 0.25 0.02 −0.65 <0.0001
Sedentary 38.1 (0.4) 41.1 (0.6) 39.4 (0.6) 42.7 (0.5) −0.32 0.009 0.78 <0.0001

Data is shown as Least Square Means (SE).

Bolded p-values (<0.05) indicate significant result.

d = effect size d.

Controlling for race/ethnicity, parent education and maturity.

Children nested in middle school.

MVPA, moderate-to-vigorous physical activity.