July 26, 2018
D B Souza et al, 2018. Acute caffeine intake improves lower body resistance exercise performance with blood flow restriction, Int J Sports Physiol Perform, published online.
Purpose: The purpose of this study was to examine the effects of acute caffeine intake on physical performance in three sets of unilateral knee extension with blood flow restriction.
Methods: In a double-blind crossover design, 22 trained men ingested 6 mg/kg of caffeine (CAF) or a placebo (PLA), 1 hour prior to performing unilateral knee extension exercise with blood flow restriction until exhaustion (30% of 1RM).
Results: There was a significant difference in the number of repetitions between the CAF and PLA conditions in the 1st set (28.3 ± 5.3 vs 23.7 ± 3.2; P=0.005), 2nd set (11.6 ± 3.1 vs 8.9 ± 2.9; P=0.03), and total repetitions performed across the three sets (44.5 ± 9.4 vs 35.0 ± 6.6; P=0.001). Blood lactate was also significantly different (P=0.03) after exercise between the CAF (7.8 ± 1.1 mmol.L-1) and PLA (6.0 ± 0.9 mmol.L-1). In regard to pain perception, there was a difference between the CAF and PLA in the 2nd (6.9 ± 1.5 vs 8.4 ± 1.4; P=0.04) and 3rdsets (8.7 ± 0.4 vs 9.5 ± 0.6; P=0.01). No differences were found for perceived effort.
Conclusion: Acute caffeine intake increases performance, blood lactate concentration and reduces perception of pain in unilateral knee extension exercise with blood flow restriction.
Ja tak, jeg vil gerne modtage nyhedsbrev, når der er noget nyt om kaffe og helbred.