Development of two methods to estimate body composition of bears

1994 ◽  
Vol 72 (2) ◽  
pp. 220-226 ◽  
Author(s):  
Sean D. Farley ◽  
Charles T. Robbins
Keyword(s):  
Body Composition ◽  
Lipid Content ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Body Lipid ◽  
Brown Bears ◽  
Highly Correlated ◽  
Water Dilution ◽  
Isotopic Water

The measurement of body composition in black bears (Ursus americanus), brown bears (U. arctos), and polar bears (U. maritimus) was investigated by means of isotopic water dilution and bioelectrical impedance analysis (BIA). The basic relationships between body lipid, water, protein, and ash were determined by direct chemical measurement of 13 black and 6 brown bears. Body water and lipid content as a percentage are highly correlated (r2 = 0.98, standard error of the estimate (SEE) = 1.1%) and inversely proportional. The dry, lipid-free mass averaged 83.5 ± 1.6% protein and 16.5 ± 1.6% ash. Either isotopic water dilution or BIA can be used to estimate body lipid content of healthy, uninjured bears (r2 = 0.93, SEE = 2.7% and r2 = 0.96, SEE = 2.2%, respectively). Isotopic water equilibrated with body water by 150 min. Abscesses and recent injuries (i.e., gunshot or snare wounds) produced erroneous body composition estimates when BIA was used, but only when the injury was in the conductor path between the BIA electrodes. Dilution estimates were not affected by injuries. Currently, neither method can be used on dead bears.

scholarly journals Body Composition in Renal Transplant Patients

1999 ◽  
Vol 10 (5) ◽  
pp. 1067-1079
Author(s):  
EUGÉNIE C.H. VAN DEN HAM ◽  
JEROEN P. KOOMAN ◽  
MAARTEN H.L. CHRISTIAANS ◽  
FRED H.M. NIEMAN ◽  
BERNHARD K. VAN KREEL ◽  
...  
Keyword(s):  
Body Composition ◽  
Renal Transplant ◽  
Isotope Dilution ◽  
Intraclass Correlation ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Body Water ◽  
Fat Free Mass ◽  
Percentage Body Fat ◽  
Method Agreement

Abstract. Whether multifrequency bioelectrical impedance analysis (MF-BIA), a relatively new method for measuring body composition, is also applicable for accurate body composition measurements in renal transplant (RTx) patients is not known. Therefore, the use of MF-BIA is validated in 77 RTx patients with a stable renal function at least 2 yr posttransplantation. MF-BIA is compared to isotope dilution techniques for measurement of body water compartments, and to dual energy x-ray absorptiometry (DEXA) and anthropometry for measurement of fat and fat free mass. Finally, DEXA and anthropometry are compared to each other. Method agreement is assessed by intraclass correlation coefficients (ICC) and plotted by Bland and Altman analysis. MF-BIA significantly underestimates total body water (TBW, 0.7 ± 2.1 L) and overestimates the extracellular water (ECW, 3.3 ± 1.8 L) compared to isotope dilution; the ICC between both techniques is 0.943 for TBW and 0.846 for ECW. The percentage body fat (BF) measured by MF-BIA is significantly higher than both BF measured by DEXA (3.4 ± 4.7%) or by anthropometry (5.5 ± 5.2%). The ICC between MF-BIA and DEXA is 0.887 and between MF-BIA and anthropometry 0.856. BF measured by DEXA is significantly higher than BF measured by anthropometry (2.1 ± 4.4%); their ICC is 0.913. In conclusion, MF-BIA seems to be suitable for measurement of TBW in RTx patients; however, method agreement between isotope dilution and MF-BIA for the measurement of ECW is not satisfactory. In the assessment of fat and fat free mass, the reliability of MF-BIA appears to be questionable. Method agreement between DEXA and anthropometry seems to be slightly better.

scholarly journals POS-129 BIOELECTRICAL IMPEDANCE ANALYSIS IN DETERMINING BODY COMPOSITION IN SRI LANKAN PATIENTS WITH LUPUS NEPHRITIS

2021 ◽  
Vol 6 (4) ◽  
pp. S52
Author(s):  
D. BASNAYAKE ◽  
A. Nayanamali ◽  
H. Amarathunga ◽  
N. Erandika ◽  
J. Pathiraja ◽  
...  
Keyword(s):  
Body Composition ◽  
Lupus Nephritis ◽  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Sri Lankan

scholarly journals Muscular Strength, Power, and Endurance Adaptations after Two Different University Fitness Classes

Sports ◽  
2021 ◽  
Vol 9 (8) ◽  
pp. 107
Author(s):  
Brittany S. Hollerbach ◽  
Sarah J. Cosgrove ◽  
Justin A. DeBlauw ◽  
Nattinee Jitnarin ◽  
Walker S. C. Poston ◽  
...  
Keyword(s):  
College Students ◽  
Body Composition ◽  
Muscular Strength ◽  
Vertical Jump ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Future Research ◽  
Significant Group ◽  
Muscle Strengthening ◽  
Maintain Body Weight

Physical activity (PA) classes help college students add weekly PA, which can help improve health and maintain body weight. Traditional weight training (TWT) can improve strength and aerobic capacity. High-intensity functional training such as CrossFit® (CF) provides time-efficient workouts with both muscle strengthening and aerobic exercises. Limited research has compared these classes for college students. We examined changes in muscular strength, power, and endurance as well as body composition. Participants were 85 healthy college students enrolled in TWT (n = 36, age 22.6 ± 4.1 years, 72.2% male) or CF (n = 49, age 21.8 ± 3.2 years, 55.1% male) classes meeting twice/wk for 8 weeks between October 2017 and May 2018. Baseline and posttest measurements included a vertical jump, grip strength, a 2 min push-up test, a 1 min squat test, height, weight, and a bioelectrical impedance analysis. Although no significant group × time interactions were found, there was a significant main effect of time for push-ups and squats (both p < 0.001). Participants enjoyed the classes and most planned to continue. Both classes improved muscular endurance although no significant differences were found between them. Activity classes provide college students with an option for increasing their weekly PA and help maintain body composition. Future research should examine the benefits from longer or more frequent classes.

Multifrequency bioelectrical impedance analysis to assess human body composition

1999 ◽  
Vol 19 (8) ◽  
pp. 1179-1188 ◽  
Author(s):  
Sufia Islam ◽  
Iqbal Kabir ◽  
Mohammad A. Wahed ◽  
Michael I. Goran ◽  
Dilip Mahalanabis ◽  
...  
Keyword(s):  
Body Composition ◽  
Human Body ◽  
Bioelectrical Impedance Analysis ◽  
Bioelectrical Impedance ◽  
Impedance Analysis ◽  
Human Body Composition
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