BACKGROUND/ OBJECTIVE: Obesity exacerbates age-related physical disability; however, observational studies show that any weight loss in old age is associated with greater risk of mortality. Conversely, randomized controlled trials in older adults show that weight loss is beneficial. The discrepancy may be due to weight loss intention and differential changes to regional body composition. The purpose of this research was to evaluate the independent role of regional body composition remodeling in improving physical function. DESIGN: Pilot Randomized Controlled Trial. SETTING: Community based research center. PARTICIPANTS: Thirty-six community dwelling, overweight to moderately obese (BMI 28.0-39.9 kg/m2) older adults (age 70.6±6.1 yrs). INTERVENTION: Physical activity plus weight loss (PA+WL, n=21) or PA plus successful aging (SA) education. PA consisted primary of treadmill walking supplemented with lower extremity resistance and balance training. The WL program was based on the Diabetes Prevention Project and aimed at achieving a 7% weight loss by cutting calories, specifically those from fat. MEASUREMENTS: At baseline, 6- and 12-months, body composition was measured using computerized tomography and dual x-ray absorptiometry. Abdominal visceral (VAT) and thigh intermuscular (IMAT) adipose tissue were quantified. Physical function was assessed using the short physical performance battery (SPPB). RESULTS: Separate multivariable linear regression models with both groups combined demonstrated that decreases in IMAT and VAT were significantly associated with improvements in SPPB (P<0.05) independent of change in total fat mass. PA+WL improved SPPB scores from baseline (0.8±1.4, P<0.05), whereas PA+SA did not; however no intergroup difference was detected. Of note, these effects were mainly achieved during the intensive intervention phase. CONCLUSION: Decreases in IMAT and VAT are important mechanisms underlying improved function following intentional weight loss plus physical activity.
BACKGROUND/ OBJECTIVE: Obesity exacerbates age-related physical disability; however, observational studies show that any weight loss in old age is associated with greater risk of mortality. Conversely, randomized controlled trials in older adults show that weight loss is beneficial. The discrepancy may be due to weight loss intention and differential changes to regional body composition. The purpose of this research was to evaluate the independent role of regional body composition remodeling in improving physical function. DESIGN: Pilot Randomized Controlled Trial. SETTING: Community based research center. PARTICIPANTS: Thirty-six community dwelling, overweight to moderately obese (BMI 28.0-39.9 kg/m2) older adults (age 70.6±6.1 yrs). INTERVENTION: Physical activity plus weight loss (PA+WL, n=21) or PA plus successful aging (SA) education. PA consisted primary of treadmill walking supplemented with lower extremity resistance and balance training. The WL program was based on the Diabetes Prevention Project and aimed at achieving a 7% weight loss by cutting calories, specifically those from fat. MEASUREMENTS: At baseline, 6- and 12-months, body composition was measured using computerized tomography and dual x-ray absorptiometry. Abdominal visceral (VAT) and thigh intermuscular (IMAT) adipose tissue were quantified. Physical function was assessed using the short physical performance battery (SPPB). RESULTS: Separate multivariable linear regression models with both groups combined demonstrated that decreases in IMAT and VAT were significantly associated with improvements in SPPB (P<0.05) independent of change in total fat mass. PA+WL improved SPPB scores from baseline (0.8±1.4, P<0.05), whereas PA+SA did not; however no intergroup difference was detected. Of note, these effects were mainly achieved during the intensive intervention phase. CONCLUSION: Decreases in IMAT and VAT are important mechanisms underlying improved function following intentional weight loss plus physical activity.
Authors: Joan C Murphy; Jennifer L McDaniel; Katherine Mora; Dennis T Villareal; Luigi Fontana; Edward P Weiss Journal: J Appl Physiol (1985) Date: 2011-10-20
Authors: W Jack Rejeski; Roger A Fielding; Steven N Blair; Jack M Guralnik; Thomas M Gill; Evan C Hadley; Abby C King; Stephen B Kritchevsky; Michael E Miller; Anne B Newman; Marco Pahor Journal: Contemp Clin Trials Date: 2005-04 Impact factor: 2.226
Authors: Anne B Newman; Constance M Bayles; Carole N Milas; Kathleen McTigue; Kathy Williams; Joseph F Robare; Christopher A Taylor; Stephen M Albert; Lewis H Kuller Journal: J Aging Health Date: 2010-05-21
Authors: Bret H Goodpaster; Peter Chomentowski; Bryan K Ward; Andrea Rossi; Nancy W Glynn; Matthew J Delmonico; Stephen B Kritchevsky; Marco Pahor; Anne B Newman Journal: J Appl Physiol (1985) Date: 2008-09-25
Authors: O Addison; M J Drummond; P C LaStayo; L E Dibble; A R Wende; D A McClain; R L Marcus Journal: J Nutr Health Aging Date: 2014-05 Impact factor: 4.075
Authors: A W Frank-Wilson; J P Farthing; P D Chilibeck; C M Arnold; K S Davison; W P Olszynski; S A Kontulainen Journal: Osteoporos Int Date: 2016-02-15 Impact factor: 4.507
Authors: Joshua F Baker; Sogol Mostoufi-Moab; Jin Long; Babette Zemel; Said Ibrahim; Elena Taratuta; Mary B Leonard Journal: Arthritis Care Res (Hoboken) Date: 2018-11-02 Impact factor: 4.794
Authors: Joshua F Baker; Sogol Mostoufi-Moab; Jin Long; Elena Taratuta; Mary B Leonard; Babette Zemel Journal: Arthritis Care Res (Hoboken) Date: 2021-03 Impact factor: 4.794
Authors: Adam J Santanasto; Bret H Goodpaster; Stephen B Kritchevsky; Iva Miljkovic; Suzanne Satterfield; Ann V Schwartz; Steven R Cummings; Robert M Boudreau; Tamara B Harris; Anne B Newman Journal: J Gerontol A Biol Sci Med Sci Date: 2017-04-01 Impact factor: 6.053