title: Commentaries on viewpoint: control arms in exercise training studies: transitioning from an era of intervention efficacy to one of comparative clinical effectiveness research.
authors: Rikke
authors: R
authors: Krogh-Madsen
authors: Lindsay S
authors: LS
authors: Nagamatsu
authors: Jennifer C
authors: JC
authors: Davis
authors: Teresa Y L
authors: TY
authors: Liu-Ambrose
authors: James M
authors: JM
authors: Smoliga
mesh_terms: D018849:Controlled Clinical Trials as Topic / Q000379:methods*; D019317:Evidence-Based Medicine; D005081:Exercise Therapy; D006801:Humans; D012107:Research Design