Table 4.

Oxford/Jadad rating.

Author	Oxford	Jadad
Annesi 2006 [14]	2b	NA
Annesi et al. 2007 [16]	2b	NA
Annesi et al. 2008 [15]	2b	NA
Dishman et al. 2004 [17, 24]	1b	1a
Jamner et al. 2004 [18]	1b	1a
Lubans et al. 2010 [19]	2b	3a, b, c
Stevens et al. 2003 [20]	1b	1a
Verstraete et al. 2007 [21]	1b	2a, c
Wilson et al. 2002 [23]	2b	NA
Wilson et al. 2005 [22]	1b	1a

Oxford designation: individual RCT (1b), individual cohort study (2b).

Jadad designation: (1 point assigned for each a, b, c) randomization mentioned (a), randomization was appropriate (b), the fate of all participants in the study is known (c). Not applicable due to study design (NA).