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Effect of spontaneous saliva swallowing on short ‐term heart rate variability (HRV) and reliability of HRV analysis
Summary The effects of effortful swallowing and solid meal ingestions on heart rate variability (HRV) have been examined previously. The effects of spontaneous saliva swallowing on short‐term HRV and reliability of HRV analysis have not been studied before. The effect of saliva swallowing on HRV analyses parameters [meanRRI, SDNN (standard deviation of normal‐to‐normal), LF (low frequency), HF (high frequency) powers, LH/HF] and the reliability of LF and HF powers were investigated by frequency, time–frequency and intraclass correlation coefficient (ICC) analyses. Electrocardiogram and swallowing signal that obtain...
Source: Clinical Physiology and Functional Imaging - September 1, 2017 Category: Radiology Authors: Metin Yildiz, Serian Doma Tags: Original Article Source Type: research

Loading rate and contraction duration effects on in  vivo human Achilles tendon mechanical properties
Summary Tendons are viscoelastic, which implies loading rate dependency, but loading rates of contractions are often not controlled during assessment of human tendon mechanical properties in vivo. We investigated the effects of sustained submaximal isometric plantarflexion contractions, which potentially negate loading rate dependency, on the stiffness of the human Achilles tendon in vivo using dynamometry and ultrasonography. Maximum voluntary contractions (high loading rate), ramp maximum force contractions with 3 s loading (lower loading rate) and sustained contractions (held for 3 s) at 25%, 50% and 80% of maximal ...
Source: Clinical Physiology and Functional Imaging - September 1, 2017 Category: Radiology Authors: Christopher McCrum, Kai D. Oberl änder, Gaspar Epro, Peter Krauss, Darren C. James, Neil D. Reeves, Kiros Karamanidis Tags: Short Communication Source Type: research

Efficacy of constant load verification testing to confirm VO2max attainment
Summary Although maximal oxygen uptake (VO2max) has been measured for almost 100 years, it is unknown when ‘true’ VO2max is attained. Primary (the VO2 plateau) and secondary criteria are used to confirm VO2max incidence, but frequency of the VO2 plateau varies, and secondary criteria are relatively invalid. The verification test (VER) seems to elicit similar estimates of VO2max versus the incremental value (INC), yet existing data are limited by small populations and use of inadequate criteria to confirm ‘true’ VO2max. We investigated the efficacy of VER by analysing data from 109 participants who underwent INC fo...
Source: Clinical Physiology and Functional Imaging - September 1, 2017 Category: Radiology Authors: Todd A. Astorino, Jamie DeRevere Tags: Original Article Source Type: research

Clinical experience of a new reference material for exercise capacity in exercise stress testing in Sweden
ConclusionA large amount of patients are being classified as having decreased exercise capacity and very few as having good exercise capacity using the new reference material for exercise capacity. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - September 1, 2017 Category: Radiology Authors: Thomas Lindow, Henrik Mos én, Henrik Engblom Tags: Original Article Source Type: research

The effects of menstrual cycle phase on the incidence of plateau at V ˙O2max and associated cardiorespiratory dynamics
Summary The purpose of this study was to examine the effect of menstrual cycle phase on maximal oxygen uptake () and associated cardiodynamic responses. A total of 16 active females volunteered of which n = 10 formed the non‐oral contraceptive pill group (n‐OCP), displaying a regular menstrual cycle of 28·4 ± 2·2 days (age 20·6 ± 1·6 years, height 169·9 ± 6·4 cm, mass 68·7 ± 7·9 kg) and n = 6 formed the oral contraceptive pill group (OCP) (monophasic pill) (age 21·7 years ± 2·16, height 168·1 cm ± 6·8 cm, mass 61·6 ± 6·8 kg). Each completed four incremental exercise tests ...
Source: Clinical Physiology and Functional Imaging - September 1, 2017 Category: Radiology Authors: Dan Gordon, Adrian Scruton, Richard Barnes, James Baker, Luciano Prado, Viviane Merzbach Tags: Original Article Source Type: research

Estimated peak functional capacity: an accurate method for assessing change in peak oxygen consumption after cardiac rehabilitation?
ConclusionChange in estimated VO2peak derived from the ACSM leg cycling equation is not an accurate surrogate for directly determined changes in VO2peak. Our findings show poor agreement between estimates of VO2peak and directly determined VO2peak. Applying estimates of VO2peak to determine CRF change may over‐estimate the efficacy of CR and lead to a different interpretation of study findings. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 30, 2017 Category: Radiology Authors: S. Nichols, D. O. Gleadall ‐Siddall, R. Antony, A. L. Clark, J. G. F. Cleland, S. Carroll, L. Ingle Tags: Original Article Source Type: research

Estimated peak functional capacity: an accurate method for assessing change in peak oxygen consumption after cardiac rehabilitation?
Clinical Physiology and Functional Imaging, EarlyView. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 30, 2017 Category: Radiology Source Type: research

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Clinical Physiology and Functional Imaging, Ahead of Print. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 30, 2017 Category: Radiology Source Type: research

Relationships between central arterial stiffness, lean body mass, and absolute and relative strength in young and older men and women
Summary Relationships between muscular strength and arterial stiffness as well as between muscle mass and arterial stiffness have been observed suggesting a link between the neuromuscular system and vascular health. However, the relationship between central arterial stiffness and absolute and relative strength along with muscle mass has not been investigated in both sexes across a broad age range. The purpose of this study was to examine the relationship between central arterial stiffness and absolute and relative strength as well as between central arterial stiffness and lean body mass (LBM) in men and women across a bro...
Source: Clinical Physiology and Functional Imaging - August 17, 2017 Category: Radiology Authors: Christopher A. Fahs, Robert S. Thiebaud, Lindy M. Rossow, Jeremy P. Loenneke, Debra A. Bemben, Michael G. Bemben Tags: Original Article Source Type: research

Relationships between central arterial stiffness, lean body mass, and absolute and relative strength in young and older men and women
Clinical Physiology and Functional Imaging, EarlyView. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 16, 2017 Category: Radiology Source Type: research

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Clinical Physiology and Functional Imaging, Ahead of Print. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 16, 2017 Category: Radiology Source Type: research

Allometric scaling of flow ‐mediated dilation: is it always helpful?
This study examined whether allometric scaling FMD influenced the difference between a group of healthy young and older adults compared to the Traditional %FMD, and to determine whether a New (allometric) scaling %FMD improved the ability to obtain individually scaled FMD. Popliteal artery FMD was assessed in 18 young (26 ± 3 years) and 17 older adults (77 ± 5 years). ‘Corrected’ mean FMD was generated from a log‐linked ANCOVA model. Individual %FMD was evaluated using three calculations: (1) Traditional %FMD calculation; (2) Atkinson (allometric) scaling %FMD (peak diameter ); and (3) New scaling %FMD . Trad...
Source: Clinical Physiology and Functional Imaging - August 14, 2017 Category: Radiology Authors: K. M. McLay, J. P. Nederveen, J. J. Koval, D. H. Paterson, J. M. Murias Tags: Original Article Source Type: research

Allometric scaling of flow ‐mediated dilation: is it always helpful?
Clinical Physiology and Functional Imaging, EarlyView. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 13, 2017 Category: Radiology Source Type: research

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Clinical Physiology and Functional Imaging, Ahead of Print. (Source: Clinical Physiology and Functional Imaging)
Source: Clinical Physiology and Functional Imaging - August 13, 2017 Category: Radiology Source Type: research

Reaction time can be measured during voluntary contractions with electrode array
Summary Reaction time (RT) is classically divided into premotor time (PMT) and electromechanical delay (EMD). However, the determination of the onset of electromyographic activity (EMG) during voluntary contraction remains questionable. In addition, the reliability of RT, PMT and EMD needs to be determined. Twelve participants performed two sessions of RT trials, separated by 5 min. RT was evaluated during voluntary isometric contractions of the elbow flexors, i.e., time between a light signal (stimulus) and the onset of the mechanical response. To assess EMD, an electrode array (64 channels) was used to accurately detect...
Source: Clinical Physiology and Functional Imaging - August 10, 2017 Category: Radiology Authors: Y. Le Mansec, A. Nordez, S. Dorel, M. Jubeau Tags: Short Communication Source Type: research