BACKGROUND: There is concern that surgically-induced weight loss in obese subjects is associated with a disproportionate decrease in lean body mass (LBM) and in skeletal muscle mass (SMM), a major constituent of LBM. To address this issue, 1) we measured total and regional body composition following gastric banding in a group of obese subjects, and 2) we compared these data to those of a non-surgical control group of similar age and body size. METHODS: Body composition was assessed by dual-energy X-ray absorptiometry (DEXA) before and after laparoscopic adjustable silicone gastric banding (LAGB) in 32 women (after 1 year: age 43.7+/-8.4 years, BMI 36.4+/-5.9 kg/m2, mean+/-SD), and in 117 control women (age 44.5+/-7.5 years; BMI 36.7+/-5.5 kg/m2) referred for non-surgical weight management, prior to weight loss. SMM was estimated using a published equation based on LBM of the extremities (appendicular LBM). RESULTS: 1 year after LAGB, body weight loss (-23.7+/-11.6 kg, P<10(-6)) was mainly due to decreased fat mass (-21.2+/-11.2 kg, P<10(-6)), and total LBM was modestly, although significantly, decreased (-2.1+/-4.2 kg, P=0.01). Appendicular LBM (-0.7+/-2.7 kg) and total SMM (-0.9+/-3.0 kg) were not significantly modified. None of the body composition variables was significantly decreased in weight-reduced subjects compared to the control group, especially appendicular LBM and total SMM. CONCLUSIONS: Results provide no evidence for a decrease in appendicular LBM and total SMM with weight loss following LAGB. Follow-up of these obese patients revealed a very favorable pattern of change in total and regional body composition, with preservation of muscle mass.
BACKGROUND: There is concern that surgically-induced weight loss in obese subjects is associated with a disproportionate decrease in lean body mass (LBM) and in skeletal muscle mass (SMM), a major constituent of LBM. To address this issue, 1) we measured total and regional body composition following gastric banding in a group of obese subjects, and 2) we compared these data to those of a non-surgical control group of similar age and body size. METHODS: Body composition was assessed by dual-energy X-ray absorptiometry (DEXA) before and after laparoscopic adjustable silicone gastric banding (LAGB) in 32 women (after 1 year: age 43.7+/-8.4 years, BMI 36.4+/-5.9 kg/m2, mean+/-SD), and in 117 control women (age 44.5+/-7.5 years; BMI 36.7+/-5.5 kg/m2) referred for non-surgical weight management, prior to weight loss. SMM was estimated using a published equation based on LBM of the extremities (appendicular LBM). RESULTS: 1 year after LAGB, body weight loss (-23.7+/-11.6 kg, P<10(-6)) was mainly due to decreased fat mass (-21.2+/-11.2 kg, P<10(-6)), and total LBM was modestly, although significantly, decreased (-2.1+/-4.2 kg, P=0.01). Appendicular LBM (-0.7+/-2.7 kg) and total SMM (-0.9+/-3.0 kg) were not significantly modified. None of the body composition variables was significantly decreased in weight-reduced subjects compared to the control group, especially appendicular LBM and total SMM. CONCLUSIONS: Results provide no evidence for a decrease in appendicular LBM and total SMM with weight loss following LAGB. Follow-up of these obesepatients revealed a very favorable pattern of change in total and regional body composition, with preservation of muscle mass.
Authors: Jaehee Kim; ZiMian Wang; Steven B Heymsfield; Richard N Baumgartner; Dympna Gallagher Journal: Am J Clin Nutr Date: 2002-08 Impact factor: 7.045
Authors: W G van Gemert; K R Westerterp; B A van Acker; A J Wagenmakers; D Halliday; J M Greve; P B Soeters Journal: Int J Obes Relat Metab Disord Date: 2000-06
Authors: Melinda A Maggard; Lisa R Shugarman; Marika Suttorp; Margaret Maglione; Harvey J Sugerman; Harvey J Sugarman; Edward H Livingston; Ninh T Nguyen; Zhaoping Li; Walter A Mojica; Lara Hilton; Shannon Rhodes; Sally C Morton; Paul G Shekelle Journal: Ann Intern Med Date: 2005-04-05 Impact factor: 25.391
Authors: M Laville; M Romon; G Chavrier; B Guy-Grand; M Krempf; J M Chevallier; J P Marmuse; A Basdevant Journal: Obes Surg Date: 2005 Nov-Dec Impact factor: 4.129
Authors: Penelope S Coates; John D Fernstrom; Madelyn H Fernstrom; Philip R Schauer; Susan L Greenspan Journal: J Clin Endocrinol Metab Date: 2004-03 Impact factor: 5.958
Authors: David G Levitt; Lauren M Beckman; Jennifer R Mager; Bret Valentine; Shalamar D Sibley; Tiffany R Beckman; Todd A Kellogg; Sayeed Ikramuddin; Carrie P Earthman Journal: J Appl Physiol (1985) Date: 2010-06-17