2. Quality rating of trials.

Study	Concealed allocation	ITT	Assessor blind	Participants blind	Compable at entry	Identical care	Inclusion/ exclusion	Interventions defined	Outcomes defined
Ades 1996	1	0	0	0	2	2	0	2	1
Baker 2001	2	2/0	2/0	2	2	2	2	2	2
Balagopal 2001	1	0	0	0	2	2	1	1	2
Ballor 1996	1	0	0	0	2	2	1	2	2
Barrett 2002	1	2	2	0	2	2	1	2	2
Baum 2003	1	2	2	0	2	2	2	2	2
Bean 2004	1	1	2	0	2	2	2	2	2
Beneka 2005	1	0	0	0	2	2	1	2	2
Bermon 1999	1	0	0	0	2	1	0	2	2
Boshuizen 2005	1	1	2	0	1	2	2	2	2
Brandon 2000	0	0	0	0	2	2	1	2	2
Brandon 2003	1	1	0	0	2	0	1	2	2
Brochu 2002	1	1	0	0	2	2	2	2	2
Bruunsgaard 2004	1	1	0	0	2	2	1	2	1
Buchner 1997	1	2	2	0	2	2	2	2	2
Casaburi 2004	1	1	2	0	2	2	2	2	1
Castaneda 2001	1	1	2/0	2	2	2	2	2	2
Castaneda 2004	1	0	2	0	2	2	1	2	2
Chandler 19981	1	0	1	0	2	2	2	2	2
Charette 1991	1	0	0	0	1	2	0	2	2
Chin A Paw 2006	2	2	2	0	2	2	2	2	2
Collier 1997	1	0	0	0	1	2	1	1	2
Damush 1999	1	0	0	1	2	2	1	1	2
de Vos 20051	1	1	1	2	2	2	2	2	2
de Vreede 2007	1	1	2	0	2	2	1	2	2
DeBeliso 2005	1	1	0	0	2	0	1	2	2
DiFrancisco 2007	1	0	0	0	1	2	1	2	2
Donald 2000	2	0	0	0	2	2	0	0	2
Earles 2001	1	0	0	0	2	2	2	2	2
Ettinger 1997	1	2	2	1	2	2	2	2	2
Fahlman 2002	1	0	0	0	1	2	1	2	2
Fatouros 2002	1	1	0	0	2	2	2	2	2
Fatouros 2005	1	1	0	0	2	2	1	2	2
Fiatarone 1994	1	2	2/0	1	2	2	2	2	2
Fiatarone 1997	1	0	0	1	0	2	0	2	2
Fielding 2002	1	1	0	0	2	2	2	2	2
Flynn 1999	1	0	0	0	2	2	1	2	2
Foley 2003	2	2	2	0	2	2	2	2	2
Frontera 2003	1	0	0	0	2	0	1	2	2
Galvao 2005	1	1	0	0	2	2	1	2	2
Hagerman 2000	1	0	0	0	2	2	0	2	2
Harris 2004	1	1	0	0	2	2	1	2	2
Haykowsky 2005	1	1	2	0	0	2	1	2	2
Haykowsky 2000	1	0	0	0	2	2	1	1	2
Hennessey 2001	1	0	0	0	2	2	2	2	2
Hepple 1997	1	0	0	0	2	2	1	2	2
Hiatt 1994	1	0	0	0	1	2	2	2	2
Hortobagyi 2001	1	0	0	0	2	2	2	2	2
Hruda 2003	1	0	0	0	2	2	1	2	2
Hunter 2001	1	0	0	0	2	2	0	2	1
Izquierdo 2004	1	1	0	0	2	2	2	2	2
Jette 1996	1	0	2	0	2	2	2	2	2
Jette 1999	2	0	2	0	2	2	2	2	2
Jones 1994	1	0	2	0	2	2	1	2	2
Jubrias 2001	1	0	0	0	2	2	1	2	2
Judge 1994	1	2	2	1	2	2	2	2	2
Kalapotharakos 2005	1	1	2	0	2	2	1	2	2
Kallinen 2002	1	1	0	0	2	2	1	2	2
Katznelson 2006	1	1	2	2	2	2	2	2	2
Kongsgaard 2004	1	1	0	0	2	2	2	2	2
Krebs 2007	1	1	2	1	1	2	2	2	2
Lamoureux 2003	1	1	0	0	2	2	1	2	2
Latham 2001	2	0	0	0	2	2	2	2	2
Latham 2003	2	2	2	1	2	2	2	2	2
Liu‐Ambrose 2005	1	2	2	0	2	2	2	2	2
Macaluso 2003	1	2	0	0	0	2	1	2	2
Madden 2006	1	0	0	0	2	2	2	2	2
Maiorana 1997	1	0	0	0	2	2	2	2	1
Malliou 2003	1	0	0	0	2	2	1	2	2
Mangione 2005	1	1	2	0	2	2	2	2	2
Manini 2005	1	1	0	0	2	2	2	2	2
Maurer 1999	1	0	2	1	1	2	2	1	2
McCartney 1995	1	0	0	1	2	2	2	2	1
McGuigan 2001	1	0	0	0	2	2	1	2	1
McMurdo 1995	2	0	2	1	2	2	2	1	2
Mihalko 1996	1	0	0	1	1	2	0	1	1
Mikesky 2006	1	2	2	0	2	2	1	2	2
Miller 2006	1	2	2	0	2	2	2	2	2
Miszko 2003	1	1	0	0	2	2	2	2	2
Moreland 2001	2	2	2	1	2	2	0	0	0
Nelson 1994	1	2	0	0	2	2	2	2	2
Newnham 1995	1	0	2	1	2	2	2	2	2
Nichols 1993	1	0	0	0	2	2	2	2	1
Ouellette 2004	1	2	2	0	2	2	2	2	2
Parkhouse 2000	1	0	0	0	1	2	2	1	1
Perrig‐Chiello 1998	1	0	0	0	0	2	0	0	0
Pollock 1991	1	0	0	0	2	2	2	2	2
Pu 2001	1	2	2/0	2	2	2	2	2	2
Rall 1996	1	0	0	0	2	2	1	2	2
Reeves 2004	1	0	0	0	2	2	1	2	2
Rhodes 2000	1	0	0	0	2	2	1	2	1
Schilke 1996	1	0	0	0	2	2	0	1	2
Schlicht 1999	1	0	0	0	2	2	2	2	1
Segal 2003	1	2	2	0	2	2	2	2	2
Selig 2004	1	0	0	0	2	2	2	2	2
Seynnes 2004	1	1	0	2	2	2	2	2	2
Simons 2006	1	1	0	0	2	2	1	2	2
Simoneau 2006	1	0	0	0	2	2	1	2	2
Simpson 1992	1	0	0	0	2	2	2	1	1
Sims 2006	2	2	2	0	2	2	2	2	2
Singh 1997	1	0	2/0	1	2	2	2	2	2
Singh 2005	1	1	2	2	2	2	2	2	2
Sipila 1996	1	0	0	0	1	2	1	2	2
Skelton 1995	1	0	0	0	2	2	1	2	2
Skelton 1996	1	0	0	0	2	2	1	2	1
Sousa 2005	1	0	0	0	2	0	1	2	2
Suetta 2004	1	1	1	0	2	2	2	2	2
Sullivan 2005	2	2	2	0/2	2	2	2	2	2
Symons 2005	1	1	0	0	2	2	1	2	2
Taaffe 1996	1	0	0	0	2	2	1	2	2
Taaffe 1999	1	0	0	0	2	2	2	2	2
Thielman 2004	1	0	0	0	1	2	1	2	2
Topp 1993	1	0	0	1	2	2	1	2	2
Topp 1996	1	0	0	1	2	2	1	2	2
Topp 2002	1	0	0	0	2	2	2	2	2
Topp 2005	1	1	0	0	2	2	2	2	2
Tracy 2004	1	0	0	0	2	2	1	2	2
Tsutsumi 1997	1	0	0	0	2	2	1	2	2
Tyni‐Lenne 2001	1	0	0	0	2	1	2	1	2
Vincent 2002	1	0	0	0	2	2	1	2	2
Westhoff 2000	1	0	2	0	2	2	1	2	2
Wieser 2007	1	1	0	0	2	2	2	2	2
Wood 2001	1	0	0	0	2	2	2	2	2

Note: 2/0 indicates that different standards used to assess different outcomes in the same study 
 NA = not available, no full report published