The Effects of Restriction Pressure on Muscle Damage Responses to Blood Flow Restriction Exercise
The Effects of Restriction Pressure on Muscle Damage Responses to Blood Flow Restriction Exercise
NCT ID: NCT05037942 Phase: NA Status: COMPLETED Enrollment: 34 Completion: 2022-06-28
Conditions
Muscle Damage, Muscle Soreness, Muscle Strength
Interventions
Blood flow restriction at 40% limb occlusion pressure, Blood flow restriction at 80% limb occlusion pressure
Summary
Blood flow restriction (BFR) exercise involves the application of a constriction device to the limbs to restrict muscle blood flow during exercise. In recent years, BFR has become increasingly popular due to its additive effects on low-load resistance training, often promoting greater increases in muscle strength and size compared to similar resistance training without BFR. However, like other exercise, it is possible that BFR exercise can cause exercise-induced muscle damage (EIMD) that results in short-term reductions in muscle function and increased muscle soreness and swelling. One major variable that may influence the onset of EIMD is the restriction pressure used to restrict blood flow; however, the influence of restriction pressure on resistance EIMD is unclear.
The purpose of this study is to investigate effects of two different restriction pressures (low and high) on EIMD responses to a bout of low-load BFR resistance exercise in a sample of healthy, active adults. It is hypothesised that a higher restriction pressure will result in increased EIMD compared to a lower restriction pressure. To test this hypothesis, participants will perform a lower-body exercise protocol with and without BFR, and several markers of EIMD will be assessed before and immediately, 24, 48, and 72 hours after the exercise.
Primary Outcome
Mean change in maximal voluntary isometric force of the knee extensors from pre-intervention up to 72 hours post-intervention