1. Physical activity, walking exercise, and calf skeletal muscle characteristics in patients with peripheral arterial disease 
Mary McGrae McDermott, MD, Jack M. Guralnik, MD, PhD, Luigi Ferrucci, MD, PhD, Lu Tian, ScD, William H. Pearce, MD, Frederick Hoff, MD, Kiang Liu, PhD, Yihua Liao, MS, Michael H. Criqui, MD, MPH 
Journal of Vascular Surgery 
Volume 46, Issue 1, Pages (July 2007)
DOI: /j.jvs
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions

2. Fig 1
Adjusted associations of physical activity levels and walking exercise frequency with calf muscle area among 439 participants with peripheral arterial disease (n = 263 for accelerometer data). Vertical accelerometer tertiles: 1st tertile (≤499) (light gray bars), 2nd tertile ( ) (medium gray bars), 3rd tertile (>828) (black bars). Blocks walked tertiles: 1st tertile (≤4), 2nd tertile (>4-21), 3rd tertile (>21). Walking exercise frequency: first group, no walking exercise; second group, walking exercise 1 to 2 times per week; third group, walking exercise >3 times per week. Data are adjusted for age, sex, race, body mass index, leg symptoms, comorbidities, study cohort, smoking, tibia length, and ankle-brachial index.
Journal of Vascular Surgery  , 87-93DOI: ( /j.jvs )
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions

3. Fig 2
Adjusted associations of physical activity levels and walking exercise frequency with calf muscle density among 439 participants with peripheral arterial disease (n = 263 for accelerometer data). Vertical accelerometer tertiles: 1st tertile (≤499) (light gray bars), 2nd tertile ( ) (medium gray bars), 3rd tertile (>828) (black bars). Blocks walked tertiles: 1st tertile (≤4), 2nd tertile (>4-21), 3rd tertile (>21). Walking exercise frequency: first group, no walking exercise; second group, walking exercise 1 to 2 times per week; third group, walking exercise >3 times per week. Data are adjusted for age, sex, race, body mass index, leg symptoms, comorbidities, study cohort, smoking, tibia length, and ankle-brachial index.
Journal of Vascular Surgery  , 87-93DOI: ( /j.jvs )
Copyright © 2007 The Society for Vascular Surgery Terms and Conditions