TY  - JOUR
T1  - ANalysis of television viewing and physical activity using time substitution models—reply
AU  - Otten JJ, Littenberg B, Harvey-Berino J
Y1  - 2010/07/12
N1  - 10.1001/archinternmed.2010.211
JO  - Archives of Internal Medicine
SP  - 1173
EP  - 1174
VL  - 170
IS  - 13
N2  - 
Our study was a small (n = 36) randomized controlled trial with a TV reduction intervention. As such, we compared change in outcome measures (energy intake, energy expenditure, energy balance, body mass index, and sleep time) between a control group and an intervention group. Without prescribing specific activities to replace TV viewing time, energy expenditure in intervention subjects increased significantly and in a meaningful amount (+119 kcal/d). A subanalysis of our data suggests that the percentage of time spent engaged in light physical activity significantly increased when the percentage of time spent in sedentary activities decreased in intervention subjects. In addition, we were able to use objective data from accelerometers, which makes our findings stronger than using the hypothetical activities suggested by Mekary and Ding. More importantly, this suggests that TV restriction may have broad usefulness even for those subjects unwilling or unable to engage in specific alternative activities.

SN  - 0003-9926
M3  - doi: 10.1001/archinternmed.2010.211
UR  - http://dx.doi.org/10.1001/archinternmed.2010.211
ER  -