Stephen Lewis results 107
· Newest (Page 1/5, per page 25)
Author: Stephen Lewis ×Clear All Filters
Search Results
Early detection through mammographic screening plays a central role in improving breast cancer outcomes, with diagnostic accuracy relying heavily on radiologist performance. While experience and case volume are recognised contributors to accuracy, the specific effect of weekly mammogram reading hours (HPW) remains unclear. This study examined the relationship between HPW and diagnostic performance among BreastScreen (BS) radio...
Effect of six weeks ubiquinol supplementation on mitochondrial respiratory function and exercise capacity in healthy malesNARA Subscribed
Coenzyme Q10 (CoQ 10 ) is an integral component of the mitochondrial electron transfer system. Most studies have administered the oxidised form of CoQ 10 (ubiquinone) and observed no effects on mitochondrial respiratory function or endurance exercise performance. The reduced form of CoQ 10 , ubiquinol (UQH 2 ), has greater bioavailability than ubiquinone, but the effects of UQH 2 supplementation on mitochondrial respiratory fu...
At least 10 minutes of seated rest is required for stabilisation of blood-based hydration biomarkersNARA Subscribed
Postural changes elicit well-described haemodynamic effects on plasma volume, affecting blood-based hydration variables. While the time required for plasma volume stabilisation is well-established for supine rest, less is known for blood samples collected in a seated position, as is commonplace in physiology and nutrition experiments. Seventeen healthy participants (9 males; 8 females) stood stationary for 20 min in an upright...
Heavy prenatal alcohol exposure is associated with changes to the brain’s white matter, which may underpin attention problems observed in this population. Less is known about the effect of low to moderate exposure. This study investigated white matter correlates of attention in children with low to moderate levels of prenatal alcohol exposure and controls whose mothers abstained from alcohol. We also examined whether associati...
Purpose Exercise-induced hypohydration exacerbates biomarkers of renal injury, but studies isolating the effects of hypohydration without exercise have produced mixed findings. This study investigated the effects of 24-h severe fluid restriction on biomarkers of renal injury and glucose tolerance. Methods Fifteen males (age: 27 ± 5 y; BMI: 24.1 ± 3.8 kg/m 2 ) completed two randomised trials, involving consuming either 40 mL/kg...
The spatial patterns of bacterial communities in suspended particulate matter across the inner Great Barrier ReefNARA Subscribed
Purpose Microbial communities play a significant role in maintaining the health of Great Barrier Reef (GBR) ecosystems, however, the influence of sediment composition and other environmental factors such as temperature and wave regime on microbial communities are largely unknown. Here we show how sediment composition and exposure influences bacterial communities across the inner section of the GBR (Cleveland Bay, Halifax Bay a...
7 days of L-citrulline supplementation does not improve running performance in the heat whilst in a hypohydrated stateNARA Subscribed
Purpose 7 days L-citrulline supplementation has been reported to improve blood pressure, $$\mathop {\text{V}}\limits^{.}$$ V . O 2 kinetics, gastrointestinal (GI) perfusion and endurance cycling performance through increasing arterial blood flow. In situations where blood volume is compromised (e.g., hyperthermia/hypohydration), L-citrulline may improve thermoregulation and exercise performance by redistributing blood flow to...