The aim of this study was to investigate whether 4 weeks of exercise training against low mechanical resistance in combination with partial blood flow restriction has an additional therapeutic effect on the patients\' ability to activate the knee extensor muscle. Patients with chronic deficits in muscle strength due to knee injuries or surgery on one leg were invited to participate in this study on a completely voluntary basis.
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Quadriceps muscle isometric strength
Timeframe: Baseline and 4 weeks (post intervention)
Maximal voluntary activation level of quadriceps muscle
Timeframe: Baseline and 4 weeks (post intervention)
Quadriceps muscle isometric endurance
Timeframe: Baseline and 4 weeks (post intervention)
Voluntary activation level of quadriceps muscle during isometric endurance test
Timeframe: Baseline and 4 weeks (post intervention)
Surface EMG amplitude of quadriceps muscle during isometric endurance test
Timeframe: Baseline and 4 weeks (post intervention)