Shawn Farrokhi1, Prakash Jayabalan2, Jonathan A Gustafson3, Brian A Klatt4, Gwendolyn A Sowa5, Sara R Piva6. 1. DOD/VA Extremity Trauma and Amputation Center of Excellence, Naval Medical Center San Diego, 34800 Bob Wilson Dr., San Diego, CA, 92134, USA. Electronic address: shawn.farrokhi.civ@mail.mil. 2. Rehabilitation Institute of Chicago, USA. 3. Department of Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA. 4. Department of Orthopaedic Surgery, University of Pittsburgh, PA, USA. 5. Department of Physical Medicine and Rehabilitation, University of Pittsburgh, Pittsburgh, PA, USA. 6. Department of Physical Therapy, University of Pittsburgh, Pittsburgh, PA, USA.
Abstract
OBJECTIVE: To evaluate whether knee contact force and knee pain are different between continuous and interval walking exercise in patients with knee osteoarthritis (OA). METHODS: Twenty seven patients with unilateral symptomatic knee OA completed two separate walking exercise sessions on a treadmill at 1.3m/s on two different days: 1) a continuous 45min walking exercise session, and 2) three 15min bouts of walking exercise separated by 1h rest periods for a total of 45min of exercise in an interval format. Estimated knee contact forces using the OpenSim software and knee pain were evaluated at baseline (1st minute of walking) and after every 15min between the continuous and interval walking conditions. RESULTS: A significant increase from baseline was observed in peak knee contact force during the weight-acceptance phase of gait after 30 and 45min of walking, irrespective of the walking exercise condition. Additionally, whereas continuous walking resulted in an increase in knee pain, interval walking did not lead to increased knee pain. CONCLUSION: Walking exercise durations of 30min or greater may lead to undesirable knee joint loading in patients with knee OA, while performing the same volume of exercise in multiple bouts as opposed to one continuous bout may be beneficial for limiting knee pain.
OBJECTIVE: To evaluate whether knee contact force and knee pain are different between continuous and interval walking exercise in patients with knee osteoarthritis (OA). METHODS: Twenty seven patients with unilateral symptomatic knee OA completed two separate walking exercise sessions on a treadmill at 1.3m/s on two different days: 1) a continuous 45min walking exercise session, and 2) three 15min bouts of walking exercise separated by 1h rest periods for a total of 45min of exercise in an interval format. Estimated knee contact forces using the OpenSim software and knee pain were evaluated at baseline (1st minute of walking) and after every 15min between the continuous and interval walking conditions. RESULTS: A significant increase from baseline was observed in peak knee contact force during the weight-acceptance phase of gait after 30 and 45min of walking, irrespective of the walking exercise condition. Additionally, whereas continuous walking resulted in an increase in knee pain, interval walking did not lead to increased knee pain. CONCLUSION: Walking exercise durations of 30min or greater may lead to undesirable knee joint loading in patients with knee OA, while performing the same volume of exercise in multiple bouts as opposed to one continuous bout may be beneficial for limiting knee pain.
Authors: Miriam E Nelson; W Jack Rejeski; Steven N Blair; Pamela W Duncan; James O Judge; Abby C King; Carol A Macera; Carmen Castaneda-Sceppa Journal: Med Sci Sports Exerc Date: 2007-08 Impact factor: 5.411
Authors: W H Ettinger; R Burns; S P Messier; W Applegate; W J Rejeski; T Morgan; S Shumaker; M J Berry; M O'Toole; J Monu; T Craven Journal: JAMA Date: 1997-01-01 Impact factor: 56.272
Authors: Jonathan A Gustafson; William Anderton; Gwendolyn A Sowa; Sara R Piva; Shawn Farrokhi Journal: Gait Posture Date: 2018-10-30 Impact factor: 2.840
Authors: Prakash Jayabalan; Jonathan Gustafson; Gwendolyn A Sowa; Sara R Piva; Shawn Farrokhi Journal: Am J Phys Med Rehabil Date: 2019-04 Impact factor: 2.159