Table 2.  Contrast of treatment and control group changes in self-appraisal, mood, and days of voluntary moderate-to-vigorous physical activity over 12 weeks. Data are means (±SD).
   

Treatment
(n = 146)

Control
(n = 123)

t267

p

d

Treatment group (n=146)

            
 

Self-appraisal measure

          
 

General self

1.04 (3.22)

.08 (1.54)

3.03

.003

.38
 

Physical appearance

1.34 (2.62)

.17 (1.09)

4.63

<.001

.28
 

Physical self-concept

.75 (2.11)

.16 (1.07)

2.81

.01

.35
 

Exerc. barriers self-efficacy

2.19 (3.49)

.12 (2.03)

5.80

<.001

.73
 

Mood Measure

          
 

Tension

-1.88 (3.13)

.20 (2.41)

6.02

<.001

.74
 

Vigor

1.22 (3.74)

-.61 (2.59)

4.58

<.001

.57
 

Voluntary phys. activity days/week

1.05 (2.16)

.17 (1.97)

3.46

.001

.43
General self and physical appearance are scales of the Self-Description Questionnaire-I. Physical self-concept is a scale of the Tennessee Self-Concept Scale: 2. Tension and vigor are scales of the Profile of Mood States - Short Form. Exerc. barriers self-efficacy = Exercise Barriers Self-Efficacy Scale for Children. Voluntary physical activity days/week refers to recalled number of days in the previous week where moderate-to-vigorous physical activity was completed outside of PE and after-school care programming. SD = standard deviation; d = Cohen’s measure of effect size.