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.

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Adipose tissue secretes adiponectin, an adipocytokine that is involved in the regulation of insulin sensitivity. Following acute exercise, insulin sensitivity has been shown to increase. Increased adiponectin following exercise may be related to the change in insulin sensitivity. The purpose of the present study was to characterize the effect of a single cycle exercise session on adiponectin and to compare the exercise effects between healthy male and female subjects. Plasma concentrations of adiponectin, tissue necrosis factor-alpha (TNF-alpha), insulin, glucose, and leptin were assessed before and immediately after a 60-minute stationary cycle ergometry session at 65% of Vdot;O(2max). Male and female subjects were matched for cardiorespiratory fitness and body composition and dietary intake was controlled for the three days prior to the exercise trial. At rest, adiponectin concentration was not associated with percentage body fat, body mass index (BMI), fitness, or resting plasma variables ( P>0.05). Following exercise, neither male nor female subjects exhibited changes in adiponectin or leptin concentrations ( P>0.05). TNF-alpha exhibited a time main effect increase with exercise ( P<0.05), but there were no gender differences. These results suggest that plasma adiponectin concentrations do not change with exercise in healthy male or female subjects. Results are given as mean (SE).

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