Association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication

Andrew Gardner, Polly S. Montgomery, Kristy J. Scott, Steve M. Blevins, Azhar Afaq, Raha Nael

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

Purpose: To determine the association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. Methods: One hundred thirty-three patients limited by intermittent claudication participated in this study. Patients were assessed on their ambulatory activity patterns for 1 week with a small, lightweight step activity monitor attached to the ankle using elastic velcro straps above the lateral malleolus of the right leg. The step activity monitor recorded the number of strides taken on a minute-to-minute basis and the time spent ambulating. Patients also were characterized on ankle-brachial index (ABI), ischemic window (IW) after a treadmill test, as well as initial claudication distance (ICD), and absolute claudication distance (ACD) during treadmill exercise. Results: The patient characteristics (mean ± SD) were as follows: ABI = 0.71 ± 0.23, IW = 0.54 ± 0.72 mm Hg · min · meter-1, ICD = 236 ± 198 meters, and ACD = 424 ± 285 meters. The patients took 3366 ± 1694 strides/day, and were active for 272 ± 103 min/day. The cadence for the 30 highest, consecutive minutes of each day (15.1 ± 7.2 strides/min) was correlated with ICD (r = 0.316, P < .001) and ACD (r = 0.471, P < 0.001), and the cadence for the 60 highest, consecutive minutes of each day (11.1 ± 5.4 strides/min) was correlated with ICD (r = 0.290, P < .01) and ACD (r = 0.453, P < .001). Similarly, the cadences for the highest 1, 5, and 20 consecutive minutes, and the cadence for the 30 highest, nonconsecutive minutes all were correlated with ICD and ACD (P < .05). None of the ambulatory cadences were correlated with ABI (P > .05) or with ischemic window (P > .05). Conclusion: Daily ambulatory cadences are associated with severity of intermittent claudication, as measured by ACD and ICD, but not with peripheral hemodynamic measures.

Original languageEnglish (US)
Pages (from-to)1238-1244
Number of pages7
JournalJournal of Vascular Surgery
Volume48
Issue number5
DOIs
StatePublished - Nov 1 2008

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Intermittent Claudication
Exercise
Ankle Brachial Index
Exercise Test
Ankle
Leg
Hemodynamics

All Science Journal Classification (ASJC) codes

  • Surgery
  • Cardiology and Cardiovascular Medicine

Cite this

Gardner, Andrew ; Montgomery, Polly S. ; Scott, Kristy J. ; Blevins, Steve M. ; Afaq, Azhar ; Nael, Raha. / Association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. In: Journal of Vascular Surgery. 2008 ; Vol. 48, No. 5. pp. 1238-1244.
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title = "Association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication",
abstract = "Purpose: To determine the association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. Methods: One hundred thirty-three patients limited by intermittent claudication participated in this study. Patients were assessed on their ambulatory activity patterns for 1 week with a small, lightweight step activity monitor attached to the ankle using elastic velcro straps above the lateral malleolus of the right leg. The step activity monitor recorded the number of strides taken on a minute-to-minute basis and the time spent ambulating. Patients also were characterized on ankle-brachial index (ABI), ischemic window (IW) after a treadmill test, as well as initial claudication distance (ICD), and absolute claudication distance (ACD) during treadmill exercise. Results: The patient characteristics (mean ± SD) were as follows: ABI = 0.71 ± 0.23, IW = 0.54 ± 0.72 mm Hg · min · meter-1, ICD = 236 ± 198 meters, and ACD = 424 ± 285 meters. The patients took 3366 ± 1694 strides/day, and were active for 272 ± 103 min/day. The cadence for the 30 highest, consecutive minutes of each day (15.1 ± 7.2 strides/min) was correlated with ICD (r = 0.316, P < .001) and ACD (r = 0.471, P < 0.001), and the cadence for the 60 highest, consecutive minutes of each day (11.1 ± 5.4 strides/min) was correlated with ICD (r = 0.290, P < .01) and ACD (r = 0.453, P < .001). Similarly, the cadences for the highest 1, 5, and 20 consecutive minutes, and the cadence for the 30 highest, nonconsecutive minutes all were correlated with ICD and ACD (P < .05). None of the ambulatory cadences were correlated with ABI (P > .05) or with ischemic window (P > .05). Conclusion: Daily ambulatory cadences are associated with severity of intermittent claudication, as measured by ACD and ICD, but not with peripheral hemodynamic measures.",
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Association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. / Gardner, Andrew; Montgomery, Polly S.; Scott, Kristy J.; Blevins, Steve M.; Afaq, Azhar; Nael, Raha.

In: Journal of Vascular Surgery, Vol. 48, No. 5, 01.11.2008, p. 1238-1244.

Research output: Contribution to journalArticle

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T1 - Association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication

AU - Gardner, Andrew

AU - Montgomery, Polly S.

AU - Scott, Kristy J.

AU - Blevins, Steve M.

AU - Afaq, Azhar

AU - Nael, Raha

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N2 - Purpose: To determine the association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. Methods: One hundred thirty-three patients limited by intermittent claudication participated in this study. Patients were assessed on their ambulatory activity patterns for 1 week with a small, lightweight step activity monitor attached to the ankle using elastic velcro straps above the lateral malleolus of the right leg. The step activity monitor recorded the number of strides taken on a minute-to-minute basis and the time spent ambulating. Patients also were characterized on ankle-brachial index (ABI), ischemic window (IW) after a treadmill test, as well as initial claudication distance (ICD), and absolute claudication distance (ACD) during treadmill exercise. Results: The patient characteristics (mean ± SD) were as follows: ABI = 0.71 ± 0.23, IW = 0.54 ± 0.72 mm Hg · min · meter-1, ICD = 236 ± 198 meters, and ACD = 424 ± 285 meters. The patients took 3366 ± 1694 strides/day, and were active for 272 ± 103 min/day. The cadence for the 30 highest, consecutive minutes of each day (15.1 ± 7.2 strides/min) was correlated with ICD (r = 0.316, P < .001) and ACD (r = 0.471, P < 0.001), and the cadence for the 60 highest, consecutive minutes of each day (11.1 ± 5.4 strides/min) was correlated with ICD (r = 0.290, P < .01) and ACD (r = 0.453, P < .001). Similarly, the cadences for the highest 1, 5, and 20 consecutive minutes, and the cadence for the 30 highest, nonconsecutive minutes all were correlated with ICD and ACD (P < .05). None of the ambulatory cadences were correlated with ABI (P > .05) or with ischemic window (P > .05). Conclusion: Daily ambulatory cadences are associated with severity of intermittent claudication, as measured by ACD and ICD, but not with peripheral hemodynamic measures.

AB - Purpose: To determine the association between daily ambulatory activity patterns and exercise performance in patients with intermittent claudication. Methods: One hundred thirty-three patients limited by intermittent claudication participated in this study. Patients were assessed on their ambulatory activity patterns for 1 week with a small, lightweight step activity monitor attached to the ankle using elastic velcro straps above the lateral malleolus of the right leg. The step activity monitor recorded the number of strides taken on a minute-to-minute basis and the time spent ambulating. Patients also were characterized on ankle-brachial index (ABI), ischemic window (IW) after a treadmill test, as well as initial claudication distance (ICD), and absolute claudication distance (ACD) during treadmill exercise. Results: The patient characteristics (mean ± SD) were as follows: ABI = 0.71 ± 0.23, IW = 0.54 ± 0.72 mm Hg · min · meter-1, ICD = 236 ± 198 meters, and ACD = 424 ± 285 meters. The patients took 3366 ± 1694 strides/day, and were active for 272 ± 103 min/day. The cadence for the 30 highest, consecutive minutes of each day (15.1 ± 7.2 strides/min) was correlated with ICD (r = 0.316, P < .001) and ACD (r = 0.471, P < 0.001), and the cadence for the 60 highest, consecutive minutes of each day (11.1 ± 5.4 strides/min) was correlated with ICD (r = 0.290, P < .01) and ACD (r = 0.453, P < .001). Similarly, the cadences for the highest 1, 5, and 20 consecutive minutes, and the cadence for the 30 highest, nonconsecutive minutes all were correlated with ICD and ACD (P < .05). None of the ambulatory cadences were correlated with ABI (P > .05) or with ischemic window (P > .05). Conclusion: Daily ambulatory cadences are associated with severity of intermittent claudication, as measured by ACD and ICD, but not with peripheral hemodynamic measures.

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