1. Exercise therapy after coronary artery bypass graft surgery: a randomized comparison of a high and low frequency exercise therapy program 
Inge D van der Peijl, MS, Thea P.M Vliet Vlieland, MD, PhD, Michel I.M Versteegh, MD, Judith J Lok, PhD, Marten Munneke, MS, Robert A.E Dion, MD, PhD 
The Annals of Thoracic Surgery 
Volume 77, Issue 5, Pages (May 2004)
DOI: /j.athoracsur

2. Fig 1
Randomization and time table of the trial. (HF = high frequency group; LF = low frequency group.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

3. Fig 2
Trial profile. (CABG = coronary artery bypass graft; HF = high frequency group; LF = low frequency group; +WE = including the weekend; −WE = not in the weekend.)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )

4. Fig 3
Results of the HF and LF groups for the five clinical activity milestones: bed to chair (A), walking in the room (B), walking at the ward (C), taking part in exercise group (D), and climbing stairs (E). (HF = high frequency group [straight line]; LF = low frequency group [dashed line].)
The Annals of Thoracic Surgery  , DOI: ( /j.athoracsur )