Table 1 Search strategy of Cochrane Central Register of Controlled Trials

. #1 MeSH descriptor: [Child] explode all trees

. #2 MeSH descriptor: [Adolescent] explode all trees

. #3 child* or adolesc* or teen* or boy* or girl* or youth:ti,ab,kw (Word variations have been searched)

. #4 young near/1 (person or people):ti,ab,kw (Word variations have been searched)

. #5 #1or#2or#3or#4

. #6 MeSH descriptor: [Motor Activity] this term only

. #7 MeSH descriptor: [Exercise] explode all trees

. #8 MeSH descriptor: [Sports] explode all trees

. #9 MeSH descriptor: [Sedentary Lifestyle] explode all trees

. #10 physical* activ*:ti,ab,kw (Word variations have been searched)

. #11 exercis* or sport*:ti,ab,kw (Word variations have been searched)

. #12 active near/2 (living or lifestyle):ti,ab,kw (Word variations have been searched)

. #13 sedentary behavi?r:ti,ab,kw (Word variations have been searched)

. #14 (screen or sedentary or sitting or TV or television or computer or PC or video games) near/2 time:ti,ab,kw (Word variations have been searched)

. #15 #6or#7or#8or#9or#10or#11or#12or#13or#14

. #16 MeSH descriptor: [Accelerometry] explode all trees

. #17 acceleromet*:ti,ab,kw (Word variations have been searched)

. #18 actigraph*:ti,ab,kw (Word variations have been searched)

. #19 activity near/1 monitor*.:ti,ab,kw (Word variations have been searched)

. #20 #16or#17or#18or#19

. #21 MeSH descriptor: [Overweight] explode all trees

. #22 overweight or obes*:ti,ab,kw (Word variations have been searched)

. #23 #21or#22

. #24 #5 and #15 and #20 and #23