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  • 1
    Online Resource
    Online Resource
    Development of a dual-energy X-ray absorptiometry-derived body volume equation in Hispanic adults for administering a four-compartment model
    Cambridge University Press (CUP) ; 2020
    In:  British Journal of Nutrition Vol. 123, No. 12 ( 2020-06-28), p. 1373-1381
    Details
    In: British Journal of Nutrition, Cambridge University Press (CUP), Vol. 123, No. 12 ( 2020-06-28), p. 1373-1381
    Abstract: The purpose of the present study was: (1) to develop a new dual-energy X-ray absorptiometry (DXA)-derived body volume (BV) equation with the GE-Lunar prodigy while utilising underwater weighing (UWW) as a criterion and (2) to cross-validate the novel DXA-derived BV equation (4C-DXA Nickerson ), Wilson DXA-derived BV equation (4C-DXA Wilson ) and air displacement plethysmography (ADP)-derived BV (4C-ADP) in Hispanic adults. A total of 191 Hispanic adults (18–45 years) participated in the present study. The development sample consisted of 120 females and males (50 % females), whereas the cross-validation sample comprised of forty-one females and thirty males ( n 71). Criterion body fat percentage (BF %) and fat-free mass (FFM) were determined using a four-compartment (4C) model with UWW as a criterion for BV (4C-UWW). 4C-DXA Nickerson , 4C-DXA Wilson and 4C-ADP were compared against 4C-UWW in the cross-validation sample. 4C-DXA Nickerson , 4C-DXA Wilson and 4C-ADP all produced similar validity statistics when compared with 4C-UWW in Hispanic males (all P 〉 0·05). 4C-DXA Nickerson also yielded similar BF % and FFM values as 4C-UWW when evaluating the mean differences (constant error (CE)) in Hispanic females (CE = –0·79 % and 0·38 kg; P = 0·060 and 0·174, respectively). However, 4C-DXA Wilson produced significantly different BF % and FFM values (CE = 3·22 % and –2·20 kg, respectively; both P 〈 0·001). Additionally, 4C-DXA Wilson yielded significant proportional bias when estimating BF % ( P 〈 0·001), whereas 4C-ADP produced significant proportional bias for BF % and FFM (both P 〈 0·05) when evaluated in Hispanic females. The present study findings demonstrate that 4C-DXA Nickerson is a valid measure of BV in Hispanics and is recommended for use in clinics, where DXA is the main body composition assessment technique.
    Type of Medium: Online Resource
    ISSN: 0007-1145 , 1475-2662
    URL: Article
    DOI: 10.1017/S0007114520000598
    Language: English
    Publisher: Cambridge University Press (CUP)
    Publication Date: 2020
    detail.hit.zdb_id: 2016047-1
    SSG: 12
    SSG: 21
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  • 2
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    Hemodynamic Responses to Resistance Exercise with Blood Flow Restriction Using a Practical Method Versus a Traditional Cuff-Inflation System
    MDPI AG ; 2022
    In:  International Journal of Environmental Research and Public Health Vol. 19, No. 18 ( 2022-09-14), p. 11548-
    Details
    In: International Journal of Environmental Research and Public Health, MDPI AG, Vol. 19, No. 18 ( 2022-09-14), p. 11548-
    Abstract: The aim of this study was to examine the potential differences in acute hemodynamic responses and muscular performance outcomes following resistance exercise between traditional blood flow restriction (TRABFR) and a novel band tissue flossing method (BTFBFR). METHODS: Fifteen healthy young adults (23.27 ± 2.69 years) visited the lab for three sessions (≥72 h apart). Each session’s exercise consisted of three sets of 20 maximum-effort seated leg extensions and flexions with one of three conditions: control (CON), TRABFR (50% limb occlusion pressure (LOP)), or BTFBFR. During TRABFR and BTFBFR sessions, occlusion was applied immediately prior to exercise and removed immediately after. Heart rate was collected prior to exercise, after onset of occlusion, immediately after exercise, and one-minute after removal of occlusion. Ultrasonography was performed prior to, and at least 30 s after, occlusion. RESULTS: BTFBFR caused greater reductions in arterial distance (14.28%, p = 0.010) and arterial area (28.43%, p = 0.020) than TRABFR. BTFBFR was able to significantly reduce arterial flow below pre-occlusion values, while TRABFR did not. Both conditions caused significant elevations in heart rate following occlusion (TRABFR: +4.67 bpm, p = 0.046 and BTFBFR: +6.07 bpm, p = 0.034), immediately post-exercise (TRABFR: +56.93 bpm, p 〈 0.001 and BTFBFR: +52.79 bpm, p 〈 0.001) and one-minute post-exercise (TRABFR: +15.71, p = 0.003 and BTFBFR: +14.57, p 〈 0.001). Only BTFBFR caused significant reductions in performance as measured by average power per repetition. CONCLUSIONS: BTFBFR causes a more exaggerated decrease in arterial blood flow as well as muscular power when compared to traditional TRABFR at 50% of LOP.
    Type of Medium: Online Resource
    ISSN: 1660-4601
    URL: Article
    DOI: 10.3390/ijerph191811548
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2175195-X
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  • 3
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    Heart Rate Variability and Training Load Among National Collegiate Athletic Association Division 1 College Football Players Throughout Spring Camp
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Journal of Strength and Conditioning Research Vol. 32, No. 11 ( 2018-11), p. 3127-3134
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 32, No. 11 ( 2018-11), p. 3127-3134
    Abstract: Flatt, AA, Esco, MR, Allen, JR, Robinson, JB, Earley, RL, Fedewa, MV, Bragg, A, Keith, CM, and Wingo, JE. Heart rate variability and training load among National Collegiate Athletic Association Division 1 college football players throughout spring camp. J Strength Cond Res 32(11): 3127–3134, 2018—The purpose of this study was to determine whether recovery of cardiac-autonomic activity to baseline occurs between consecutive-day training sessions among positional groups of a collegiate football team during Spring camp. A secondary aim was to evaluate relationships between chronic (i.e., 4-week) heart rate variability (HRV) and training load parameters. Baseline HRV (lnRMSSD_BL) was compared with HRV after ∼20 hours of recovery before next-day training (lnRMSSDpost20) among positional groups composed of SKILL ( n = 11), MID-SKILL ( n = 9), and LINEMEN ( n = 5) with a linear mixed model and effect sizes (ES). Pearson and partial correlations were used to quantify relationships between chronic mean and coefficient of variation (CV) of lnRMSSD (lnRMSSD_chronic and lnRMSSDcv, respectively) with the mean and CV of PlayerLoad (PL_chronic and PL_cv, respectively). A position × time interaction was observed for lnRMSSD ( p = 0.01). lnRMSSD_BL was higher than lnRMSSDpost20 for LINEMEN ( p 〈 0.01; ES = large), whereas differences for SKILL and MID-SKILL were not statistically different ( p 〉 0.05). Players with greater body mass experienced larger reductions in lnRMSSD ( r = −0.62, p 〈 0.01). Longitudinally, lnRMSSDcv was significantly related to body mass ( r = 0.48) and PL_chronic ( r = −0.60). After adjusting for body mass, lnRMSSDcv and PL_chronic remained significantly related ( r = −0.43). The ∼20-hour recovery time between training sessions on consecutive days may not be adequate for restoration of cardiac-parasympathetic activity to baseline among LINEMEN. Players with a lower chronic training load throughout camp experienced greater fluctuation in lnRMSSD (i.e., lnRMSSDcv) and vice versa. Thus, a capacity for greater chronic workloads may be protective against perturbations in cardiac-autonomic homeostasis among American college football players.
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0000000000002241
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 4
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    Cardiac-Autonomic Responses to In-Season Training Among Division-1 College Football Players
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Journal of Strength and Conditioning Research Vol. 34, No. 6 ( 2020-06), p. 1649-1656
    Details
    In: Journal of Strength and Conditioning Research, Ovid Technologies (Wolters Kluwer Health), Vol. 34, No. 6 ( 2020-06), p. 1649-1656
    Abstract: Flatt, AA, Esco, MR, Allen, JR, Robinson, JB, Bragg, A, Keith, CM, Fedewa, MV, and Earley, RL. Cardiac-autonomic responses to in-season training among Division-1 college football players. J Strength Cond Res 34(6): 1649–1656, 2020—Despite having to endure a rigorous in-season training schedule, research evaluating daily physiological recovery status markers among American football players is limited. The purpose of this study was to determine whether recovery of cardiac-autonomic activity to resting values occurs between consecutive-day, in-season training sessions among college football players. Subjects ( n = 29) were divided into groups based on position: receivers and defensive backs (SKILL, n = 10); running backs, linebackers, and tight-ends (MID-SKILL, n = 11) and linemen (LINEMEN, n = 8). Resting heart rate (RHR) and the natural logarithm of the root mean square of successive differences multiplied by 20 (LnRMSSD) were acquired at rest in the seated position before Tuesday and Wednesday training sessions and repeated over 3 weeks during the first month of the competitive season. A position × time interaction was observed for LnRMSSD ( p = 0.04), but not for the RHR ( p = 0.33). No differences in LnRMSSD between days was observed for SKILL (Tuesday = 82.8 ± 9.3, Wednesday = 81.9 ± 8.7, p 〉 0.05). Small reductions in LnRMSSD were observed for MID-SKILL (Tuesday = 79.2 ± 9.4, Wednesday = 76.2 ± 9.5, p ≤ 0.05) and LINEMEN (Tuesday = 79.4 ± 10.5, Wednesday = 74.5 ± 11.5, p ≤ 0.05). The individually averaged changes in LnRMSSD from Tuesday to Wednesday were related to PlayerLoad ( r = 0.46, p = 0.02) and body mass ( r = −0.39, p = 0.04). Cardiac-parasympathetic activity did not return to resting values for LINEMEN or MID-SKILL before the next training session. Larger reductions in LnRMSSD tended to occur in players with greater body mass despite having performed lower workloads, although some individual variability was observed. These findings may have implications for how coaches and support staff address training and recovery interventions for players demonstrating inadequate cardiovascular recovery between sessions.
    Type of Medium: Online Resource
    ISSN: 1064-8011
    URL: Article
    DOI: 10.1519/JSC.0000000000002475
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
    detail.hit.zdb_id: 2142889-X
    SSG: 31
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  • 5
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    Vagally Derived Heart Rate Variability and Training Perturbations With Menses in Female Collegiate Rowers
    Human Kinetics ; 2022
    In:  International Journal of Sports Physiology and Performance Vol. 17, No. 3 ( 2022-03-1), p. 432-439
    Details
    In: International Journal of Sports Physiology and Performance, Human Kinetics, Vol. 17, No. 3 ( 2022-03-1), p. 432-439
    Abstract: Introduction : The parasympathetically derived marker of heart rate variability, root mean square of successive R-R differences (RMSSD), and the daily fluctuations as measured by the coefficient of variation (RMSSD CV ) may be useful for tracking training adaptations in athletic populations. These vagally derived markers of heart rate variability may be especially pertinent when simultaneously considering a female athlete’s menstrual cycle. Purpose : The purpose of this study was to observe the perturbations in RMSSD CV , while considering RMSSD, across a season in the presence and absence of menses with training load in female collegiate rowers. Methods : Thirty-six (20 [1] y, 25.6 [3.4]  kg·m −2 ) National Collegiate Athletic Association Division I female rowers were monitored for 18 consecutive weeks across a full season. Seated, ultrashortened RMSSD measurements were obtained by the rowers on at least 3 mornings per week using a smartphone photoplethysmography device. Following the RMSSD measurement, athletes indicated the presence or absence of menstruation within the application. Individual meters rowed that week and sessions rate of perceived exertion were obtained to quantify training load. Results : Longitudinal mixed-effects modeling demonstrated a significant effect of menses and time, while also considering RMSSD, such that those who were on their period had a significantly greater RMSSD CV than those who were not (11.2% vs 7.5%, respectively; P   〈  .001). These changes were independent of meters rowed, sessions rate of perceived exertion, body mass index, birth-control use, and years of rowing experience, which were all nonsignificant predictors of RMSSD CgV ( P   〉  .05). Conclusion : The presence of menses appears to significantly impact RMSSD CV when also considering RMSSD, which may allow coaches to consider individualized training plans accordingly.
    Type of Medium: Online Resource
    ISSN: 1555-0265 , 1555-0273
    URL: Article
    DOI: 10.1123/ijspp.2021-0005
    Language: Unknown
    Publisher: Human Kinetics
    Publication Date: 2022
    SSG: 31
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  • 6
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    Bioimpedance Spectroscopy Measurements Comparing Different Body Positions and Electrode Types in Men and Women : 1989 Board #250 May 31 3 30 PM - 5 00 PM
    Ovid Technologies (Wolters Kluwer Health) ; 2018
    In:  Medicine & Science in Sports & Exercise Vol. 50, No. 5S ( 2018-05), p. 482-
    Details
    In: Medicine & Science in Sports & Exercise, Ovid Technologies (Wolters Kluwer Health), Vol. 50, No. 5S ( 2018-05), p. 482-
    Type of Medium: Online Resource
    ISSN: 0195-9131
    URL: Article
    DOI: 10.1249/01.mss.0000536668.06195.55
    RVK:
    ZX 1000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2018
    detail.hit.zdb_id: 2031167-9
    SSG: 31
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  • 7
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    A novel method of utilizing skinfolds and bioimpedance for determining body fat percentage via a field-based three-compartment model
    Springer Science and Business Media LLC ; 2018
    In:  European Journal of Clinical Nutrition Vol. 72, No. 10 ( 2018-10), p. 1431-1438
    Details
    In: European Journal of Clinical Nutrition, Springer Science and Business Media LLC, Vol. 72, No. 10 ( 2018-10), p. 1431-1438
    Type of Medium: Online Resource
    ISSN: 0954-3007 , 1476-5640
    URL: Article
    DOI: 10.1038/s41430-017-0060-3
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2018
    detail.hit.zdb_id: 2004986-9
    SSG: 21
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  • 8
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    Relative accuracy of body adiposity index and relative fat mass in participants with and without down syndrome
    Springer Science and Business Media LLC ; 2019
    In:  European Journal of Clinical Nutrition Vol. 73, No. 8 ( 2019-8), p. 1117-1121
    Details
    In: European Journal of Clinical Nutrition, Springer Science and Business Media LLC, Vol. 73, No. 8 ( 2019-8), p. 1117-1121
    Type of Medium: Online Resource
    ISSN: 0954-3007 , 1476-5640
    URL: Article
    DOI: 10.1038/s41430-018-0351-3
    Language: English
    Publisher: Springer Science and Business Media LLC
    Publication Date: 2019
    detail.hit.zdb_id: 2004986-9
    SSG: 21
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  • 9
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    Agreement between supine and standing bioimpedance spectroscopy devices and dual‐energy X‐ray absorptiometry for body composition determination
    Wiley ; 2019
    In:  Clinical Physiology and Functional Imaging Vol. 39, No. 5 ( 2019-09), p. 355-361
    Details
    In: Clinical Physiology and Functional Imaging, Wiley, Vol. 39, No. 5 ( 2019-09), p. 355-361
    Abstract: Research comparing bioimpedance spectroscopy (BIS) to dual‐energy X‐ray absorptiometry (DXA) is limited, especially with newer BIS devices that take measures in a standing position instead of the traditional supine position. Purpose The purpose of this study was to compare a standing BIS device (BIS STA ) and a supine BIS device (BIS SUP ) to DXA for measuring body fat percentage (BF%), fat mass (FM) and fat‐free mass (FFM) in a cohort of male and female subjects displaying a wide range of ages and BMI levels. Methods Ninety‐five subjects (30 ± 15 years, 170 ± 8·0 cm, 72·6 ± 14·8 kg) participated in the study. Body composition measures were taken from BIS STA , BIS SUP and DXA during a single visit to the laboratory following an 8‐ to 12‐h fast in a euhydration state. Results Supine BIS device and BIS STA produced r ‐values 〉 0·91 and low SEE values for all measurements compared to DXA. Effect sizes were ‘trivial’ for FFM comparing both BIS SUP and BIS STA to DXA ( 〈 0·1) and ‘small’ for FM and BF% ( 〈 0·39). Compared to DXA, BIS STA resulted in lower total (TE) and constant errors/mean differences (CE) (TE  〈  3·6 kg, CE  〈  −1·82 kg) versus BIS SUP (TE  〈  4·35 kg, CE   〈   −3·10 kg) for FFM. Conclusion Fat‐free mass values for BIS STA resulted in the most comparable measurements to DXA with no mean differences and the lowest total error and effect size. However, the findings indicated both BIS devices may be acceptable alternatives to DXA for BF%, FM and FFM in clinical practice.
    Type of Medium: Online Resource
    ISSN: 1475-0961 , 1475-097X
    URL: Issue
    URL: Article
    DOI: 10.1111/cpf.v39.5
    DOI: 10.1111/cpf.12585
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2004626-1
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  • 10
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    Development Of A Dxa-derived Body Volume Equation In Hispanic Adults For Administering In 4-compartment Models : 3219 Board #40 May 29 1:30 PM - 3:00 PM
    Ovid Technologies (Wolters Kluwer Health) ; 2020
    In:  Medicine & Science in Sports & Exercise Vol. 52, No. 7S ( 2020-7), p. 876-876
    Details
    In: Medicine & Science in Sports & Exercise, Ovid Technologies (Wolters Kluwer Health), Vol. 52, No. 7S ( 2020-7), p. 876-876
    Type of Medium: Online Resource
    ISSN: 1530-0315 , 0195-9131
    URL: Article
    DOI: 10.1249/01.mss.0000685052.61408.7a
    RVK:
    ZX 1000
    Language: English
    Publisher: Ovid Technologies (Wolters Kluwer Health)
    Publication Date: 2020
    detail.hit.zdb_id: 2031167-9
    SSG: 31
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