Efficacy of using Internet-based interventions for physical activity promotion in a Hong Kong Secondary School: An action research approach

Figures & data

Figure 1. Kemmis and McTaggart’s (2000) action research spiral.

Figure 2. Flow diagram of participants’ progress through different phases of the group randomized trial.

Table 1. Baseline characteristics of total sample and two groups (mean ± SD or %)

	Total sample (N = 127)	IB Group (n = 65)	C Group (n = 62)
Demographics
Gender (% of female)	37.0	35.4	38.7
Age (year)	15.8 ± 1.0	15.8 ± 0.9	15.8 ± 1.0
BMI (kg/m^2)	21.0 ± 4.3	21.1 ± 4.1	20.8 ± 4.6
Physical activity
Total PA score	2,245.7	2,578.9	1,896.2
(MET min/week)	±2,727.9	±2,842.9	±2,578.5
Stages of change
Pre-contemplation (%)	13.4	12.3	14.5
Contemplation (%)	15.0	10.8	19.4
Preparation (%)	43.3	44.6	41.9
Action (%)	7.9	10.8	4.8
Maintenance (%)	20.5	21.5	19.4

Table 2. Mean physical activity (PA) scores (MET min per week) at baseline, 1st cycle and 2nd cycle assessments

	IB Group (n = 63)	C Group (n = 57)
Total PA scores (MET min/week)
Baseline	2,578.9 ± 2,842.9	1,896.2 ± 2,578.5
1st cycle assessment	2,908.2 ± 3,198.0	1,798.9 ± 2,656.3
Mean difference	329.3	−97.3
2nd cycle assessment	2,762.5 ± 2,814.5	1,817.0 ± 2,474.1
Mean difference	183.6	−79.0

Note: Data are presented as raw means (±SD), analysis was conducted on log transformed data.

Table 3. Stages of change at baseline, 1st cycle and 2nd cycle assessments

Stages of change	Baseline		1st cycle		2nd cycle
	IB (n = 63)	C (n = 59)	IB (n = 63)	C (n = 59)	IB (n = 63)	C (n = 59)
Pre-contemplation	7	8	6	4	7	7
Contemplation	6	11	11	13	10	16
Preparation	29	26	26	22	25	14
Action	7	2	4	7	8	7
Maintenance	14	12	16	13	8	15

Kemmis, S., & McTaggart, R. (2000). Participatory action research. In N. K. Denzin & Y. S. Lincoln (Eds.), Handbook of qualitative research (2nd ed., pp. 567–605). Thousand Oaks, CA: Sage.

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