نتائج البحث - "Swain, David P."

الوصف: US Naval Special Operations Forces have performed some of the US Military’s most rigorous missions. The Human Performance Program (HPP) developed a physical performance testing battery to assess and monitor physical performance. Testing bias relative to body mass has been noted in past literature, including military physical fitness tests. Purpose: This retrospective study looked to determine if there is body mass bias in the HPP performance assessment and if an optimum body mass for each performance test could be determined. Methods: Data from 333 subjects (age: 28.4 ± 5.0 yr; height: 178.4 ± 6.2 cm; mass: 86.0 ± 9.2 kg) were analyzed to compare body mass to performance on the eight performance tests: standing long jump, Pro-Agility test, weighted pull-up, body weight bench press, 1-RM deadlift, 274-m shuttle run, 4.83-km run, and 800-m swim. Linear regression analysis was used to analyze the relationship of body mass to performance; a 2nd degree polynomial was utilized to determine best-fit curves for each of the physical performance tests; ANOVA was utilized to examine differences in performance between body mass groups. Results: Significantly better performance for lighter subjects was found in the Pro-Agility test, weighted pull-up, body weight bench press, 274-m shuttle run, and 4.83-km run. Heavier subjects performed better in the 1-RM deadlift. Second-degree polynomial regression revealed optimum body mass for the Pro-Agility test, 274-m shuttle run, and 4.83-km run to be somewhat heavier than the lowest body mass. Conclusion: These findings could help professionals better assess and train operators of varying body size. The views and opinions expressed are the authors’ and do not reflect those of Naval Special Warfare Command, the US Navy or the Department of Defense. ; https://digitalcommons.odu.edu/education_darden/1007/thumbnail.jpgTest

العلاقة: https://digitalcommons.odu.edu/education_darden/8Test

الإتاحة: https://digitalcommons.odu.edu/education_darden/8Test

View record in BASE

6

دورية أكاديمية

Effect of Exercise Volume on HDL-Cholesterol: A 7-Year Case Study

المؤلفون: Swain, David P.

المصدر: Human Movement Sciences Faculty Publications

مصطلحات موضوعية: Energy expenditure, Heart Disease, High-density lipoprotein, Low-density lipoprotein, Cardiovascular Diseases, Exercise Physiology, Exercise Science

الوصف: Introduction: While exercise is known to increase HDL-cholesterol, it is not known if larger exercise volumes produce larger increases in HDL. However, the range of exercise volumes used in most training studies is limited. This report presents a case study of a middle-aged male who engaged in large variations of exercise volume over 7 years while frequently measuring HDL. The purpose was to determine if large increases in exercise volume were associated with larger increases in HDL than previously reported. Methods: The subject maintained detailed logs of his main form of exercise, bicycling. These logs were analyzed to determine the average distance cycled per week over the 8 weeks preceding each HDL measurement. A retrospective comparison of cycling distance and HDL was conducted on 6 ½ years of data. Then, the subject intentionally altered cycling distance to prospectively examine its effect on serum HDL in the subsequent 6 months. Results: The subject averaged 58 to 585 km of bicycling per week over 8-week periods, which was estimated to be approximately 1,000-10,000 kcal.wk-1 of net energy expenditure. HDL varied from 50 to 84 mg.dL-1, and a strong positive relationship with exercise volume was observed during both the retrospective and prospective portions of the study. Conclusion: Large increases in exercise volume were associated with large increases in HDL in a middle-aged male subject. These results suggest that the modest increases in HDL in most training studies may be due to the small exercise volume used.

وصف الملف: application/pdf

العلاقة: https://digitalcommons.odu.edu/hms_fac_pubs/132Test; https://digitalcommons.odu.edu/context/hms_fac_pubs/article/1133/viewcontent/Effect_of_exercise_volume.pdfTest

الإتاحة: https://doi.org/10.29011/CRCM-141Test
https://digitalcommons.odu.edu/hms_fac_pubs/132Test
https://digitalcommons.odu.edu/context/hms_fac_pubs/article/1133/viewcontent/Effect_of_exercise_volume.pdfTest

View record in BASE

7

دورية أكاديمية

Is Aiming a Handgun Like Pointing a Finger? ; 2300 Board #136 June 1 11 00 AM - 12 30 PM

المؤلفون: Kelleran, Kyle J., Morrison, Steven, Swain, David P., Russell, Daniel M.

المصدر: Medicine & Science in Sports & Exercise ; volume 50, issue 5S, page 564 ; ISSN 0195-9131

الإتاحة: https://doi.org/10.1249/01.mss.0000536947.00362.8fTest
https://journals.lww.com/00005768-201805001-01865Test

View record in BASE

8

دورية أكاديمية

The Physical Parameters of Tactical Climbing and Performance Characteristics of Naval Special Warfare Operators

المؤلفون: Wood, Dallas E., Swain, David P.

المصدر: Journal of Strength and Conditioning Research ; volume 35, issue 4, page 949-954 ; ISSN 1064-8011

الوصف: Wood, DE and Swain, DP. The physical parameters of tactical climbing and performance characteristics of naval special warfare operators. J Strength Cond Res 35(4): 949–954, 2021—Vertical elevation may be critical for advantage to Special Operation Forces and require strength, power, endurance, and technique. This study sought to (a) study differences in physical capacities of Naval Special Warfare lead climbers from nonlead climbers, (b) compare anthropometrics of lead climbers from nonlead climbers, and (c) catalogue the types and weights of the various climbing systems to assess total system weight to the lead climber's body mass. Climbing surveys were collected and retrospective physical capacity data from 15 SEa, Air and Land lead climbers (age: 31.2 ± 5.1 years; height: 181.4 ± 6.4 cm; mass: 89.4 ± 10.0 kg; body fat: 14.1 ± 3.7%) were compared against previously reported data of 305 nonlead climbers (age: 28.8 ± 5.2 years; height: 177.6 ± 12.0 cm; mass: 85.8 ± 9.7 kg; body fat: 17.3 ± 4.7%). Lead climbers had significantly less body fat percentage ( p = 0.017). Lead climbers also performed significantly better on the pro-agility test ( p = 0.017) and deadlift ( p = 0.002). The total mass reported for the climbing equipment for each tactical scenario was up to 4.9 kg for urban climbing, up to 13.7 kg for alpine climbing, and up to 8.0 kg for maritime climbing. With a typical combat load of 21.4 kg, adding an alpine climbing load exceeds one-third of the lead climbers' own body mass. Strength and conditioning programming for this population should take into consideration the total system weight for testing and training purposes and should also consider climbing-specific strength testing and training to optimize climbing capability.

الإتاحة: https://doi.org/10.1519/jsc.0000000000003954Test

View record in BASE

9

دورية أكاديمية

Influence of Body Mass on Fitness Performance in Naval Special Warfare Operators

المؤلفون: Wood, Dallas E., Swain, David P.

المصدر: Journal of Strength and Conditioning Research ; volume 35, issue 11, page 3120-3127 ; ISSN 1064-8011

الوصف: Wood, DE and Swain, DP. Influence of body mass on fitness performance in Naval Special Warfare operators. J Strength Cond Res 35(11): 3120–3127, 2021—U.S. Naval Special Operations Forces have performed some of the U.S. Military's most rigorous missions. The Human Performance Program (HPP) developed a physical performance testing battery to assess and monitor physical fitness. Testing bias relative to body mass has been noted in the past literature, including military physical fitness tests. This retrospective study looked to determine whether there is body mass bias in the HPP fitness assessment and whether an optimum body mass for each fitness test could be determined. Data from 333 subjects (age: 28.4 ± 5.0 years; height: 178.4 ± 6.2 cm; mass: 86.0 ± 9.2 kg) were analyzed to compare body mass with performance on the 8 tests: standing long jump, Pro-Agility test, weighted pull-up, body weight bench press, 1 repetition maximum (1RM) deadlift, 274-m shuttle run, 4.83-km run, and 800-m swim. Linear regression analysis was used to analyze the relationship of body mass to performance; a second-degree polynomial was used to determine best-fit curves for each of the physical fitness tests; analysis of variance was used to examine differences in performance between body mass groups. Significantly better performance for lighter subjects was found in the Pro-Agility test, weighted pull-up, body weight bench press, 274-m shuttle run, and 4.83-km run. Heavier subjects performed better in the 1RM deadlift. Second-degree polynomial regression revealed optimum body mass for the Pro-Agility test, 274-m shuttle run, and 4.83-km run to be 7–16 kg heavier than the lowest body mass. These findings could help professionals better assess and train operators of varying body size.

الإتاحة: https://doi.org/10.1519/jsc.0000000000003249Test

View record in BASE

10

دورية أكاديمية

Status of the ITER Ion Cyclotron H&CD

المصدر: EPJ Web of Conferences, Vol 157, p 02002 (2017)

مصطلحات موضوعية: Physics, QC1-999

الوصف: The ITER Ion Cyclotron Heating and Current Drive system (IC H&CD) is designed to deliver 20MW to a broad range of plasma scenarios between 40 and 55MHz, during very long pulses. It consists of two broadband equatorial port plug antennas, their pre-matching and matching systems, transmission lines, Radio Frequency (RF) Sources and High Voltage Power Supplies. The overall project schedule has been revised and agreed by ITER Council; it re-integrates the second antenna and its power supplies in construction baseline and sets the dates for progressive installation with DT phase planned in 2035. Recent progress on ICRF subsystems is reported, covering design evolution, qualification of test articles and specific R&D results in domestic agencies, suppliers, associated laboratories and IO.

وصف الملف: electronic resource

العلاقة: https://doaj.org/toc/2100-014XTest

الوصول الحر: https://doaj.org/article/286f8bc3d73240919c9db02362c0127bTest

View record in DOAJ

النص الكامل

تنقيح النتائج