Kinesiology Commons^™

Comparing Various Physiological System Adaptations Following 8 Weeks Of Resistance Training With Or Without Bfr In Older Males, Ricardo Parra

Theses and Dissertations

PURPOSE: The purpose of this study was to compare the effects of 8 weeks of resistance exercise training with and without BFR on: 1), arterial elasticity and hemodynamics (e.g., blood pressure and resting heart rate), 2) muscular force production (e.g., maximal voluntary contraction, force production, electromyography, and estimated one-repetition maximum) in males between the 50 to 70 years of age.

RESULTS: Significant condition difference for reflection magnitude occurred in BFR group (p < 0.05). Significant time*condition effect occurred in Leg Press 1RM, Leg Extension 1RM, Leg Curl 1RM, Chest Press 1RM, and Shoulder Press 1RM (p < 0.05). Significant condition* time interaction occurred for Isokinetic Leg Extension Test (60°/s) (p < 0.05). A significant time*condition interaction occurred during Maximal Voluntary Contraction (MVC) – Root Mean Square for both vastus medialis and vastus lateralis (p < 0.05). A significant time main effect occurred in the BFR group for the amplitude mean of the MVC in the vastus medialis and vastus lateralis (p < 0.05). A significant time main effect occurred for median frequency of the MVC (p < 0.05). A significant difference in Estimated Visceral Adipose Tissue occurred in the BFR group (p < 0.05). A significant condition*time interaction occurred in arm fat percentage (p < 0.05). The BFR group had significantly less fat tissue (%) in the left arm (p < 0.01) and in the right arm (p = 0.04). A significant time*main effect occurred in the total lean tissue for the left side of the body (p = 0.04).

CONCLUSION: Using BFR resistance training at a low intensity can achieve similar adaptations seen at high intensities while reducing the risk of injury that comes with heavier loads.

Acute And Chronic Bone Marker And Endocrine Responses To Resistance Exercise With And Without Blood Flow Restriction In Young Men, Debra A. Bemben, Vanessa D. Sherk, Samuel R. Buchanan, Sojung Kim, Kyle Sherk, Michael G. Bemben

Health & Human Performance Faculty Publications and Presentations

In this study, we compared acute and chronic bone marker and hormone responses to 6 weeks of low intensity (20% 1RM) blood flow restriction (BFR20) resistance training to high intensity (70% 1RM) traditional resistance training (TR70) and moderate intensity (45% 1RM) traditional resistance training (TR45) in young men (18–35 years). Participants were randomized to one of the training groups or to a control group (CON). The following training programs were performed 3 days per week for 6 weeks for knee extension and knee flexion exercises: BFR20, 20%1RM, 4 sets (30, 15, 15, 15 reps) wearing blood flow restriction cuffs around …