Lauver, JD, Cayot, TE, Rotarius, TR, and Scheuermann, BW. Acute neuromuscular microvascular responses to concentric eccentric exercises with blood flow restriction. J Strength Cond Res 34(10): 2725-2733, 2020-The purpose of this study was investigate the effects addition restriction (BFR) during on muscle excitation oxygenation status. Subjects (N = 17) were randomly assigned either a (CON, CON + BFR) or (ECC, ECC group, one leg BFR other non-BFR. Surface electromyography near-infrared...

Lauver, JD, Moran, A, Guilkey, JP, Johnson, KE, Zanchi, NE, and Rotarius, TR. Acute responses to cycling exercise with blood flow restriction during various intensities. J Strength Cond Res 36(12): 3366-3373, 2022-The purpose of this study was investigate the acute physiological at intensities (BFR). Subjects ( N = 9; V̇ o2 peak 36.09 ± 5.80 ml·kg -1 ·min ) performed 5 protocols: high-intensity (HIGH), control (CON-90), 90% ventilatory threshold (VT) work rate BFR (90-BFR), 70% VT (70-BFR),...

Introduction: Low carbohydrate (L-CHO) diets may be an effective means for weight loss; however, these L-CHO often result in decreases exercise performance during high-intensity, interval test (HIIET). Methods: Nineteen, healthy, recreationally active adults participated this study. Subjects were assigned to one of three groups: control (CON), diet w/ placebo (L-CHO), or creatine supplementation (L-CHO+Cr). performed HIIET fatigue at 90% peak power output (PPO) with a 1:1 work-to-recovery...

During heavy exercise intensity (above lactate threshold (LT)), a higher O2 cost than predicted by VO2-work rate relationship for below LT occurs which has been termed, the oxygen uptake (VO2) slow component (VO2SC). Interestingly, decrease in overall VO2 response during intermittent versus continuous previously reported. However, results less total work being performed and perhaps muscle activation, may affect amplitude of VO2SC. PURPOSE: To examine magnitude VO2SC activation to (CON) (INT)...

Consumption of a low carbohydrate (low-CHO) diet typically leads to fatigue and decreases in exercise performance. PURPOSE: This study determined if creatine supplement (CS) prevents the decrease performance associated with consuming low-CHO diet. Compared placebo (PL) group, we hypothesized that CS would prevent decline as demonstrated by an equal or improved time task failure (completed intervals). METHODS: Fourteen healthy subjects (5 males, 9 females; 25.7 ± 5.4 yrs, (±SD)) were randomly...

During constant load exercise at intensities above the lactate threshold, an additional increase in oxygen uptake (VO2) of delayed onset, termed VO2 slow component (VO2SC), becomes readily apparent. Results a previous study have shown considerable decrease overall response to high intensity when bout is interrupted by intermittent periods recovery. However, extent that addition brief recovery periods, which began onset exercise, affected magnitude VO2SC remains unclear. PURPOSE: The purpose...

Studies indicate that the rate of tissue oxygen reperfusion following brief periods occlusion can detect differences in vascular responsiveness. Consumption a high fat meal (HFM) has been shown to reduce function conduit arteries. The extent consumption HFM effects microvascular reactivity not examined. PURPOSE: To examine effect on responsiveness brachial artery (BA). It was hypothesized would slow consistent with impaired function. METHODS: Eleven healthy (27.8 ± 3.2 yrs, (± SEM)) men...

Passive leg movement (PLM) leads to a significant increase in femoral artery blood flow (FABF). Recent studies suggest that the FABF during PLM is mediated by bioavailability of nitric oxide (NO) since inhibition NO attenuates response. has been gaining popularity as simple, reliable method for assessing endothelial function. Since consumption high fat meal (HFM) shown induce dysfunction, investigators have used HFM demonstrate therapeutic benefits exercise, anti-inflammatories and...

Blood flow restriction (BFR) endurance training may induce both and strength improvements. However, there is no consensus on the ideal BFR exercise prescription in order to balance physiological perceptual responses. PURPOSE: The purpose of this investigation was examine responses, as well perceived exertion responses a range protocols. METHODS: Participants randomly performed 7 protocols: 50% difference between peak oxygen uptake (VO2) ventilatory threshold (VT) (∆50%), 90%, 80%, 70% VT...

At the onset of exercise in humans, muscle blood flow increases to a new steady-state that closely matches metabolic demand exercise. This increase has been attributed skeletal pump and rapid vasodilatory mechanisms. Yet, most research this area focused on using conduit artery as measurement site for flow. It is possible does not reflect same hyperemic response microvascular level during PURPOSE: Therefore, we attempted dissociate matching oxygen delivery by administering 0.4 mg glyceryl...

At the onset of exercise in humans, muscle blood flow (MBF) increases to a new steady-state that closely matches metabolic demand exercise. This increase has been attributed "contraction-induced vasodilation," comprised skeletal pump and rapid vasodilatory mechanisms. While most research this area focused on forearm (FBF) vascular conductance, it is possible separating FBF into diameter velocity can provide more useful information MBF regulation downstream conduit artery. Therefore, we...

Pre-workout supplements generally contain a combination of nitric oxide (NO) precursor and sympathetic nervous system agonist. Each these ingredients, by themselves, act very differently on the vascular system. The NO blend found in most pre-workout is marketed as way to increase muscle blood flow (MBF) during exercise regarded potent vasodilator. On other hand, caffeine, CNS agonist, works heart rate reduce perceived exertion, which can benefit performance. However, caffeine may also impact...