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Preventing obesity among adolescent boys: The fitness improvement and lifestyle awareness (FILA Program) randomised controlled trial
Abstracts / Journal of Science and Medicine in Sport 12 (2010) e1–e232
e85
173
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Adolescent physical activity during school lunch breaks—Same thing, different day
Preventing obesity among adolescent boys: The fitness improvement and lifestyle awareness (FILA Program) randomised controlled trial
A. Telford ∗ , M. Casey, G. Richards, C. Finch University of Ballarat School settings are an essential source of physical activity for adolescents because they provide curricular, co-curricular opportunities in addition to time during scheduled breaks. There has been limited previous research examining the physical activity behaviour of adolescents during break periods. Purpose: The aim of this study was to investigate the interday variability of adolescent’s physical activity (PA) during school lunchtime periods. Methods: Participants (n = 40) from yr 8 to 10 (mean age = 14.5 ± 0.8 yrs) wore a SPI-Elite Global Positioning System (GPS) unit during five lunchtimes during a school week. Heart rate (HR), speed, distance, global position, and G force were measured for each participant and reported across a range of play spaces including a cricket net area, grassed oval, quadrangle, basketball/netball court area and seated shaded area for each participant across the five days. Analyses were performed on time periods randomly selected from three days for windows of 20 min+. Time spent within the various play spaces was determined by overlaying GPS data with Google Earth images of the school playground. Results: Independent samples t-tests revealed males (mean = 2.5 ± .97 km) covered a greater distance compared to females (mean = 1.5 ± .73 km) at the p < 0.01 level. Males also displayed significantly higher HR than did females during lunch breaks, at the p < 0.01 level. Students spent significantly more time and covered the greatest distance on the oval (grassed area) when compared to other play spaces (p < 0.01), and girls spent significantly more time in the seated shaded area than did males (p < 0.01). There were no significant differences for inter-day variability of average time, distance, HR, speed or G force within adolescent students’ physical activity during lunchtimes. Conclusions: The results suggest adolescents’ physical activity during lunch breaks is relatively stable across days. There are a number of feasibility issues relating to the use of GPS technology within the context of school settings and these are discussed. Future physical activity interventions targeting adolescents should consider the nature of the play space and may need to be tailored differently for males and females. doi:10.1016/j.jsams.2009.10.174
L. Peralta 1,∗ , R. Jones 2 , T. Okely 2 1 The
University of Sydney of Wollongong
2 University
Purpose: To assess the feasibility, acceptability and potential efficacy of a school-based obesity prevention program among adolescent boys with sub-optimal cardiorespiratory fitness. Methodology: In 2007, a 6-month 2-arm parallel group, randomised controlled trial was conducted in a single-sex secondary school (Sydney, Australia). Thirty-three 7th Grade boys (mean age = 12.5 ± 0.4 years) were randomly assigned to intervention (n = 16) or active comparison group (n = 17). The intervention consisted of one 60-min curriculum session and two 20-minute lunchtime sessions per week (16 weeks). The active comparison program continued with their usual 60-min (weekly) curricula activities. The primary outcome was BMI, and secondary outcomes included waist circumference, percentage body fat, cardiorespiratory fitness, objectively measured physical activity and small screen recreation time. Results: Screening, recruitment and retention goals were exceeded. The majority of data were collected as intended. Implementation and attendance rates were acceptable. At follow-up, compared with boys in the active comparison group, boys in the intervention group displayed a smaller increase in BMI (adjust diff. = −0.2, 95% confidence interval [CI] −0.78, 0.39; Cohen’s d = 0.05); greater reductions in waist circumference (−1.65 cm [−4.67,1.36]; d = 0.15); percentage body fat (−1.69% [−4.98,1.60]; d = 0.22) and time spent in small screen recreation on weekends (−1.13 h [−5.06, 2.80]; d = 0.19); and a greater increase in cardiorespiratory fitness (2.13 laps [6.22,10.48]; d = 0.16); and participation in total weekday physical activity (140.74 counts/min [−159.44,440.92]; d = 0.36). Conclusions: This study verified the feasibility, acceptability and potential efficacy of a multi-faceted curriculumbased intervention to promote healthy lifestyles and prevent unhealthy weight gain among adolescent boys. doi:10.1016/j.jsams.2009.10.175
e85
173
174
Adolescent physical activity during school lunch breaks—Same thing, different day
Preventing obesity among adolescent boys: The fitness improvement and lifestyle awareness (FILA Program) randomised controlled trial
A. Telford ∗ , M. Casey, G. Richards, C. Finch University of Ballarat School settings are an essential source of physical activity for adolescents because they provide curricular, co-curricular opportunities in addition to time during scheduled breaks. There has been limited previous research examining the physical activity behaviour of adolescents during break periods. Purpose: The aim of this study was to investigate the interday variability of adolescent’s physical activity (PA) during school lunchtime periods. Methods: Participants (n = 40) from yr 8 to 10 (mean age = 14.5 ± 0.8 yrs) wore a SPI-Elite Global Positioning System (GPS) unit during five lunchtimes during a school week. Heart rate (HR), speed, distance, global position, and G force were measured for each participant and reported across a range of play spaces including a cricket net area, grassed oval, quadrangle, basketball/netball court area and seated shaded area for each participant across the five days. Analyses were performed on time periods randomly selected from three days for windows of 20 min+. Time spent within the various play spaces was determined by overlaying GPS data with Google Earth images of the school playground. Results: Independent samples t-tests revealed males (mean = 2.5 ± .97 km) covered a greater distance compared to females (mean = 1.5 ± .73 km) at the p < 0.01 level. Males also displayed significantly higher HR than did females during lunch breaks, at the p < 0.01 level. Students spent significantly more time and covered the greatest distance on the oval (grassed area) when compared to other play spaces (p < 0.01), and girls spent significantly more time in the seated shaded area than did males (p < 0.01). There were no significant differences for inter-day variability of average time, distance, HR, speed or G force within adolescent students’ physical activity during lunchtimes. Conclusions: The results suggest adolescents’ physical activity during lunch breaks is relatively stable across days. There are a number of feasibility issues relating to the use of GPS technology within the context of school settings and these are discussed. Future physical activity interventions targeting adolescents should consider the nature of the play space and may need to be tailored differently for males and females. doi:10.1016/j.jsams.2009.10.174
L. Peralta 1,∗ , R. Jones 2 , T. Okely 2 1 The
University of Sydney of Wollongong
2 University
Purpose: To assess the feasibility, acceptability and potential efficacy of a school-based obesity prevention program among adolescent boys with sub-optimal cardiorespiratory fitness. Methodology: In 2007, a 6-month 2-arm parallel group, randomised controlled trial was conducted in a single-sex secondary school (Sydney, Australia). Thirty-three 7th Grade boys (mean age = 12.5 ± 0.4 years) were randomly assigned to intervention (n = 16) or active comparison group (n = 17). The intervention consisted of one 60-min curriculum session and two 20-minute lunchtime sessions per week (16 weeks). The active comparison program continued with their usual 60-min (weekly) curricula activities. The primary outcome was BMI, and secondary outcomes included waist circumference, percentage body fat, cardiorespiratory fitness, objectively measured physical activity and small screen recreation time. Results: Screening, recruitment and retention goals were exceeded. The majority of data were collected as intended. Implementation and attendance rates were acceptable. At follow-up, compared with boys in the active comparison group, boys in the intervention group displayed a smaller increase in BMI (adjust diff. = −0.2, 95% confidence interval [CI] −0.78, 0.39; Cohen’s d = 0.05); greater reductions in waist circumference (−1.65 cm [−4.67,1.36]; d = 0.15); percentage body fat (−1.69% [−4.98,1.60]; d = 0.22) and time spent in small screen recreation on weekends (−1.13 h [−5.06, 2.80]; d = 0.19); and a greater increase in cardiorespiratory fitness (2.13 laps [6.22,10.48]; d = 0.16); and participation in total weekday physical activity (140.74 counts/min [−159.44,440.92]; d = 0.36). Conclusions: This study verified the feasibility, acceptability and potential efficacy of a multi-faceted curriculumbased intervention to promote healthy lifestyles and prevent unhealthy weight gain among adolescent boys. doi:10.1016/j.jsams.2009.10.175