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Resistance training improves strength and functional capacity in persons with multiple sclerosis

Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, FL 32611, USA, Applied Human Physiology Laboratory, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA, lwhite{at}hhp.ufl.edu

S C McCoy

Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, FL 32611, USA, Applied Human Physiology Laboratory, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA

V Castellano

Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, FL 32611, USA, Applied Human Physiology Laboratory, Department of Applied Physiology and Kinesiology, University of Florida, Gainesville, FL 32611, USA

G Gutierrez

Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, FL 32611, USA

J E Stevens

Department of Physical Therapy, University of Florida, Gainesville, FL 32611, USA

G A Walter

Department of Physiology, University of Florida, Gainesville, FL 32611, USA

K Vandenborne

Department of Physical Therapy, University of Florida, Gainesville, FL 32611, USA

The purpose of this study was to evaluate the effect of an eight-week progressive resistance training programme on lower extremity strength, ambulatory function, fatigue and self-reported disability in multiple sclerosis (MS) patients (mean disability score 3.79-0.8). Eight MS subjects volunteered for twice weekly training sessions. During the first two weeks, subjects completed one set of 8 -10 reps at 50% of maximal voluntary contraction (MVC) of knee flexion, knee extension and plantarflexion exercises. In subsequent sessions, the subjects completed one set of 10 -15 repetitions at 70% of MVC. The resistance was increased by 2 -5% when subjects completed 15 repetitions in consecutive sessions. Isometric strength of the quadriceps, hamstring, plantarflexor and dorsiflexor muscle groups was assessed before and after the training programme using an isokinetic dynamometer. Magnetic resonance images of the thigh were acquired before and after the exercise programme as were walking speed (25-ft), number of steps in 3 min, and self-reported fatigue and disability. Knee extension (7.4%), plantarflexion (52%) and stepping performance (8.7%) increased significantly (PB-0.05). Self-reported fatigue decreased (PB-0.05) and disability tended to decrease (P -0.07) following the training programme. MS patients are capable of making positive adaptations to resistance training that are associated with improved ambulation and decreased fatigue.

Key Words: disability • exercise • fatigue • fitness • multiple sclerosis • skeletal muscle • strength training

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