Search Results - "Keir, Daniel A"

A “Step–Ramp–Step” Protocol to Identify the Maximal Metabolic Steady State by IANNETTA, DANILO, INGLIS, ERIN CALAINE, POGLIAGHI, SILVIA, MURIAS, JUAN M., KEIR, DANIEL A.

“…The oxygen uptake (V[Combining Dot Above]O2) at the respiratory compensation point (RCP) closely identifies with the maximal metabolic steady state. However,…”
Get full text

The Respiratory Compensation Point and the Deoxygenation Break Point Are Valid Surrogates for Critical Power and Maximum Lactate Steady State by KEIR, DANIEL A, POGLIAGHI, SILVIA, MURIAS, JUAN M

Get full text

What Is Moderate to Vigorous Exercise Intensity? by MacIntosh, Brian R., Murias, Juan M., Keir, Daniel A., Weir, Jamie M.

“…A variety of health benefits associated with physical activity depends upon the frequency, intensity, duration, and type of exercise. Intensity of exercise is…”
Get full text

Simultaneous assessment of central and peripheral chemoreflex regulation of muscle sympathetic nerve activity and ventilation in healthy young men by Keir, Daniel A., Duffin, James, Millar, Philip J., Floras, John S.

“…Key points Central chemoreceptor stimulation, by hypercapnia (acidosis), and peripheral, by hypoxia plus hypercapnia, evoke reflex increases in ventilation and…”
Get full text

Measuring Peripheral Chemoreflex Hypersensitivity in Heart Failure by Keir, Daniel A, Duffin, James, Floras, John S

“…Heart failure with reduced ejection fraction (HFrEF) induces chronic sympathetic activation. This disturbance is a consequence of both compensatory reflex…”
Get full text

Normal and excessive muscle sympathetic nerve activity in heart failure: implications for future trials of therapeutic autonomic modulation by Badrov, Mark B., Keir, Daniel A., Tomlinson, George, Notarius, Catherine F., Millar, Philip J., Kimmerly, Derek S., Shoemaker, J. Kevin, Keys, Evan, Floras, John S.

“…Aims Patients with sympathetic excess are those most likely to benefit from novel interventions targeting the autonomic nervous system. To inform such…”
Get full text

Determination of respiratory point compensation in healthy adults: Can non-invasive near-infrared spectroscopy help? by Fontana, Federico Y, Keir, Daniel A, Bellotti, Cecilia, De Roia, Gabriela F, Murias, Juan M, Pogliaghi, Silvia

“…Abstract Objectives We tested the hypothesis that the respiratory compensation point can be accurately determined in healthy participants during incremental…”
Get full text

Evaluation of the Running-Based Anaerobic Sprint Test as a Measure of Repeated Sprint Ability in Collegiate-Level Soccer Players by Keir, Daniel A, Thériault, Francis, Serresse, Olivier

“…ABSTRACTKeir, DA, Thériault, F, and Serresse, O. Evaluation of the running-based anaerobic sprint test as a measure of repeated sprint ability in…”
Get full text

Systemic and vastus lateralis muscle blood flow and O2 extraction during ramp incremental cycle exercise by Murias, Juan M, Spencer, Matthew D, Keir, Daniel A, Paterson, Donald H

“…During ramp incremental cycling exercise increases in pulmonary O2 uptake (Vo2p) are matched by a linear increase in systemic cardiac output (Q). However, it…”
Get more information

Comparison of Cortical Autonomic Network-Linked Sympathetic Excitation by Mueller Maneuvers and Breath-Holds in Subjects With and Without Obstructive Sleep Apnea by Taylor, Keri S., Keir, Daniel A., Haruki, Nobuhiko, Kimmerly, Derek S., Millar, Philip J., Murai, Hisayoshi, Floras, John S.

“…In healthy young volunteers, acquisition of blood oxygen level-dependent (BOLD) magnetic resonance (MR) and muscle sympathetic nerve (MSNA) signals during…”
Get full text

Identification of critical intensity from a single lactate measure during a 3-min, submaximal cycle-ergometer test by Fontana, Federico Y., Colosio, Alessandro L., Keir, Daniel A., Murias, Juan M., Pogliaghi, Silvia

“…We tested the hypothesis that critical intensity in cycling can be determined from a single delta blood lactate in the third minute of a submaximal cycle…”
Get full text

Cardiovascular reflex contributions to sympathetic inhibition during low intensity dynamic leg exercise in healthy middle‐age by Notarius, Catherine F., Badrov, Mark B., Tobushi, Tomoyuki, Keir, Daniel A., Keys, Evan, Floras, John S.

“…Aging augments resting muscle sympathetic nerve activity (MSNA) and sympatho‐inhibition during mild dynamic 1‐leg exercise. To elucidate which reflexes elicit…”
Get full text

Influence of muscle metabolic heterogeneity in determining the V̇o2p kinetic response to ramp-incremental exercise by Keir, Daniel A, Benson, Alan P, Love, Lorenzo K, Robertson, Taylor C, Rossiter, Harry B, Kowalchuk, John M

“…The pulmonary O2 uptake (V̇o2p) response to ramp-incremental (RI) exercise increases linearly with work rate (WR) after an early exponential phase, implying…”
Get full text

Identification of Non-Invasive Exercise Thresholds: Methods, Strategies, and an Online App by Keir, Daniel A., Iannetta, Danilo, Mattioni Maturana, Felipe, Kowalchuk, John M., Murias, Juan M.

“…During incremental exercise, two thresholds may be identified from standard gas exchange and ventilatory measurements. The first signifies the onset of blood…”
Get full text

A Critical Evaluation of Current Methods for Exercise Prescription in Women and Men by IANNETTA, DANILO, INGLIS, ERIN CALAINE, MATTU, ANMOL T., FONTANA, FEDERICO Y., POGLIAGHI, SILVIA, KEIR, DANIEL A., MURIAS, JUAN M.

“…Common methods to prescribe exercise intensity are based on fixed percentages of maximum rate of oxygen uptake (V˙O2max), peak work rate (WRpeak), maximal HR…”
Get full text

Methodological Reconciliation of CP and MLSS and Their Agreement with the Maximal Metabolic Steady State by Iannetta, Danilo, Ingram, Christina P., Keir, Daniel A., Murias, Juan M.

“…This study aimed to compare the concordance between CP and MLSS estimated by various models and criteria and their agreement with MMSS. After a ramp test, 10…”
Get full text

Considerations for the Measurement of Respiratory Compensation Point and Critical Power in COPD by Keir, Daniel A., Murias, Juan M.

Get full text

A Single Test Protocol to Establish the Full Spectrum of Exercise Intensity Prescription by Iannetta, Danilo, Mackie, Mary Z., Keir, Daniel A., Murias, Juan M.

“…We aimed to test the extended capabilities of the SRS protocol by validating its capacity to predict the power outputs for targeted metabolic rates (V̇O 2 )…”
Get full text

Evaluation of the "Step-Ramp-Step" Protocol: Accurate Aerobic Exercise Prescription with Different Steps and Ramp Slopes by Mackie, Mary Z, Iannetta, Danilo, Keir, Daniel A, Murias, Juan M

“…To assess whether: i) a lower amplitude constant-load MOD is appropriate to determine the mean response time (MRT); ii) the method accurately corrects the…”
Get full text

Exercise Intensity Thresholds: Identifying the Boundaries of Sustainable Performance by KEIR, DANIEL A, FONTANA, FEDERICO Y, ROBERTSON, TAYLOR C, MURIAS, JUAN M, PATERSON, DONALD H, KOWALCHUK, JOHN M, POGLIAGHI, SILVIA

“…Critical power (CP), respiratory compensation point (RCP), maximal lactate steady state (MLSS), and deoxyhemoglobin breakpoint ([HHb]BP) are alternative…”
Get full text