Metabolic Demand and Indirect Markers of Muscle Damage After Eccentric Cycling With Blood Flow Restriction.
Purpose: To compare the effects of a single bout of eccentric cycling (ECC) and eccentric cycling with blood flow restriction (ECCBFR) on the changes in cardio-metabolic demand and indirect markers of muscle damage in healthy men. Method: Twenty-one young men (24.0 ± 3.2 y) were randomly allocated in two groups to perform a 30-min eccentric cycling bout with or without blood flow restriction. Oxygen consumption, heart rate, rate of perceived exertion and mean arterial blood pressure were monitored during cycling. Blood lactate was measured before and after cycling. Maximal voluntary isometric knee extensor strength and muscle damage were measured before, immediately after and 1-4 days after each eccentric cycling bout. Results: Oxygen consumption, heart rate, rate of perceived exertion and mean arterial blood pressure were similar between bouts. Blood lactate concentrations increased in both groups (p < .01), with ECCBFR showing 60% greater blood lactate concentration than eccentric cycling (p < .01). Maximal voluntary isometric knee extensor strength decreased 19-7% until 48 h and decreased 16-7% until 72 h after ECC and ECCBFR, respectively. Muscle soreness and pressure pain threshold remained elevated until 72 h after ECC and until 96 h after ECCBFR. Conclusion: These results show that ECCBFR induces similar cardiovascular stress, greater lactate production and longer time to recover than ECC alone. Thus, BFR can be safely implemented with eccentric cycling.
['Penailillo|Luis|L|', 'Santander|Miguel|M|', 'Zbinden-Foncea|Hermann|H|', 'Jannas-Vela|Sebastian|S|']
D000328:Adult D001642:Bicycling D001794:Blood Pressure D003402:Creatine Kinase D006339:Heart Rate D006801:Humans D019344:Lactic Acid D008297:Male D053580:Muscle Strength D018482:Muscle, Skeletal D063806:Myalgia D010101:Oxygen Consumption D017288:Pain Threshold D010465:Perception D005082:Physical Exertion D011659:Pulmonary Gas Exchange D012039:Regional Blood Flow D013848:Thigh D055815:Young Adult
cardiovascular BFR DOMS lengthening