Sports Medicine Commons^™

Effect Of Water Immersion Temperature On Heart Rate Variability Following Exercise In The Heat, Hui C. Choo, Kazunori Nosaka, Jeremiah J. Peiffer, Mohammed Ihsan, Chow C. Yeo, Chris R. Abbiss

Research outputs 2014 to 2021

This study compared the effect of passive rest (CON) and water immersion at 8.6±0.2°C (CWI9), 14.6±0.3°C (CWI15) and 35.0±0.4°C (thermoneutral water immersion [TWI]) on post-exercise heart rate variability (HRV) indices. In a climate chamber (32.8±0.4°C, 32±5% relative humidity), nine men completed 25 min of cycling at the first ventilatory threshold and repeated 30-second bouts at 90% of peak power followed by a 5-minute recovery treatment in a randomised crossover manner. All water immersion re-established the HRV indices (natural logarithm of the square root of the mean sum squared differences between RR intervals [ln rMSSD], low-frequency [lnLF] and high-frequency power densities …

Bone Fracture Incidence, Measurement And Adaptation: An Exploration Through The Continuum From Incidence To Measurement And Adaptation, Mark Jenkins

Theses: Doctorates and Masters

This research encompasses four studies exploring bone adaptation, fracture incidence, and preventative measures to decrease fracture risk and increase bone health. Study one was a clinical audit exploring incidence rates for appendicular fractures in children in Western Australia over ten years. Diagnostic and remedial approaches were explored in studies two, three and four by examining the between-day reliability of upper limb scans; reliability of the osteogenic index (OI) for upper-body strength and power exercises; and the diagnostic value or utility of using pQCT in disease profiling, respectively. Fracture rates in the limbs of children were found to be increasing each …

Intrarater Reliability And Agreement Of The Physioflow Bioimpedance Cardiography Device During Rest, Moderate And High-Intensity Exercise, Nicole Gordon, Chris R. Abbiss, Andrew J. Maiorana, Kieran J. Marston, Jeremiah J. Peiffer

Research outputs 2014 to 2021

The PhysioFlow bioimpedance cardiography device provides key measures of central systolic and diastolic and peripheral vascular function. Many of these variables have not been assessed for intrarater reliability and agreement during rest, submaximal exercise and high-intensity interval exercise. Twenty healthy adults (age: 26±4 years) completed two identical trials beginning with five minutes of rest followed by two 5-minute submaximal cycling bouts at 50% and 70% of peak power output. Subjects then completed ten 30-second cycling intervals at 90% of peak power output interspersed with 60 s of passive recovery. Bioimpedance cardiography (PhysioFlow; Manatec Biomedical, France) monitored heart rate, stroke volume, …

Recreational Soccer As Sport Medicine For Middle-Aged And Older Adults: A Systematic Review, Hao Luo, Robert U. Newton, Fadi Ma'ayah, Daniel A. Galvao, Dennis R. Taaffe

Research outputs 2014 to 2021

Background Strategies to prevent or attenuate the age-related decline in physical and physiological function and reduce chronic disease risk factors are of clinical importance.

Objective To examine the health benefits of recreational soccer in middle-aged and older adults.

Design Systematic review in accordance with the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines.

Data sources All available records up until 9 June 2017 in PubMed, Web of Science, SPORTDiscus, MEDLINE, Embase, CINAHL Plus, PsycINFO and Cochrane Library databases.

Eligibility criteria for selecting studies All randomised trials with or without a control group (randomised controlled trials or randomised uncontrolled trials) …

Enhanced Skeletal Muscle Ribosome Biogenesis, Yet Attenuated Mtorc1 And Ribosome Biogenesis-Related Signalling, Following Short-Term Concurrent Versus Single-Mode Resistance Training, Jackson J. Fyfe, David J. Bishop, Jonathan D. Bartlett, Erik D. Hanson, Mitchell J. Anderson, Andrew P. Garnham, Nigel K. Stepto

Research outputs 2014 to 2021

Combining endurance training with resistance training (RT) may attenuate skeletal muscle hypertrophic adaptation versus RT alone; however, the underlying mechanisms are unclear. We investigated changes in markers of ribosome biogenesis, a process linked with skeletal muscle hypertrophy, following concurrent training versus RT alone. Twenty-three males underwent eight weeks of RT, either performed alone (RT group, n = 8), or combined with either high-intensity interval training (HIT+RT group, n = 8), or moderate-intensity continuous training (MICT+RT group, n = 7). Muscle samples (vastus lateralis) were obtained before training, and immediately before, 1 h and 3 h after the final training session. …

Active And Inactive Leg Hemodynamics During Sequential Single-Leg Interval Cycling, Nicole Gordon, Chris R. Abbiss, Mohammed Ihsan, Andrew J. Maiorana, Jeremiah J. Peiffer

Research outputs 2014 to 2021

Introduction Leg order during sequential single-leg cycling (i.e., exercising both legs independently within a single session) may affect local muscular responses potentially influencing adaptations. This study examined the cardiovascular and skeletal muscle hemodynamic responses during double-leg and sequential single-leg cycling. Methods Ten young healthy adults (28 ± 6 yr) completed six 1-min double-leg intervals interspersed with 1 min of passive recovery and, on a separate occasion, 12 (six with one leg followed by six with the other leg) 1-min single-leg intervals interspersed with 1 min of passive recovery. Oxygen consumption, heart rate, blood pressure, muscle oxygenation, muscle blood volume, and …

Complex Training And Countermovement Jump Performance Across Multiple Sets: Effect Of Back Squat Intensity, Nick Poulos, Anic Chaouachi, Martin Buchheit, Denis Slimani, Greg Haff, Robert Newton

Research outputs 2014 to 2021

The purpose of this investigation was to determine the acute effects of back squats on countermovement jump performance across multiple sets using a strength-power potentiation complex training protocol. Fifteen elite volleyball players performed three unloaded countermovement jumps (CMJ) following three repetitions of the back squat performed at either 65% or 87% of 1-RM, respectively, repeated for 10 sets. A control session of three CMJs was also repeated for 10 sets. Mean jump height performance was enhanced compared to performing CMJs only irrespective of which intensity was used (65% 1-RM: +3.3 ± 2.2% [CI: 1.0 to 5.6]; 87% 1-RM: 2.6 ± …