Biological sex does not influence the peak cardiac output response to twelve weeks of sprint interval training.

Sprint interval training (SIT) increases peak oxygen uptake (V̇O) but the mechanistic basis is unclear. We have reported that 12 wk of SIT increased V̇O and peak cardiac output (Q̇) and the changes in these variables were correlated. An exploratory analysis suggested that Q̇ increased in males but not females.

The effect of bodyweight exercise on 24-h glycemic responses determined by continuous glucose monitoring in healthy inactive adults: a randomized crossover study.

Vigorous intermittent exercise can improve indices of glycemia in the 24 h postexercise period in apparently healthy individuals. We examined the effect of a single session of bodyweight exercise (BWE) on glycemic responses using continuous glucose monitoring (CGM) under controlled dietary conditions. Healthy inactive adults (n = 27; 8 males, 19 females; age: 23 ± 3 years) completed 2 virtually supervised trials spaced ~ 1 week apart in a randomized, crossover manner.

Peak Cardiac Output Determined Using Inert Gas Rebreathing: A Comparison of Two Exercise Protocols.

Purpose: This study aimed to compare Q˙peak elicited by a constant load protocol ( Q˙CL ) and an incremental step protocol ( Q˙step ).

Methods: A noninferiority randomized crossover trial was used to compare Q˙peak between protocols using a noninferiority margin of 0.5 L·min -1 .

Twelve weeks of sprint interval training increases peak cardiac output in previously untrained individuals.

Introduction: Sprint interval training (SIT), characterized by brief bouts of 'supramaximal' exercise interspersed with recovery periods, increases peak oxygen uptake ([Formula: see text]) despite a low total exercise volume. Per the Fick principle, increased [Formula: see text] is attributable to increased peak cardiac output ([Formula: see text]) and/or peak arterio-venous oxygen difference (a-vO). There are limited and equivocal data regarding the physiological basis for SIT-induced increases in [Formula: see text], with most studies lasting ≤ 6 weeks.

Increased cardiorespiratory stress during submaximal cycling after ketone monoester ingestion in endurance-trained adults.

There is growing interest in the effect of exogenous ketone body supplementation on exercise responses and performance. The limited studies to date have yielded equivocal data, likely due in part to differences in dosing strategy, increase in blood ketones, and participant training status. Using a randomized, double-blind, counterbalanced design, we examined the effect of ingesting a ketone monoester (KE) supplement (600 mg/kg body mass) or flavour-matched placebo in endurance-trained adults ( = 10 males, = 9 females; O = 57 ± 8 mL/kg/min).