Excess Body Weight and Gait Influence Energy Cost of Walking in Older Adults

Autor(es)

LaRoche, Dain P. ^[1] ; Marques, Nise R. ^[2] ; Shumila, Heidi N. ^[1] ; Logan, Christopher R. ^[1] ; St Laurent, Robyn ^[1] ; Goncalves, Mauro ^[3]

Afiliação do(s) autor(es)

^[1] Univ New Hampshire, Dept Kinesiol, Durham, NH 03824 - USA

^[2] Sao Paulo State Univ, Dept Phys Therapy & Occupat Therapy, Marilia, SP - Brazil

^[3] Sao Paulo State Univ, Dept Phys Educ, Rio Claro, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: MEDICINE AND SCIENCE IN SPORTS AND EXERCISE; v. 47, n. 5, p. 1017-1025, MAY 2015.
• Citações Web of Science: 9

Resumo

Purpose: The objective of this investigation is to study how excess body weight influences the energy cost of walking (Cw) and determine whether overweight and obese older adults self-select stride frequency to minimize Cw. Methods: Using body mass index (BMI), men and women between the ages of 65 and 80 yr were separated into normal weight (NW, BMI <= 24.9 kg.m(-2), n = 13) and overweight-obese groups (OWOB, BMI >= 25.0 kg.m(-2), n = 13). Subjects walked at 0.83 m.s(-1) on an instrumented treadmill that recorded gait parameters and completed three 6-min walking trials; at a preferred stride frequency (PSF), at +10% PSF, and at -10% PSF. Cw was determined by indirect calorimetry. Repeated-measures ANOVA was used to compare groups, and associations were tested with Pearson correlations, alpha = 0.05. Results: OWOB had 62% greater absolute Cw (301 +/- 108 vs 186 +/- 104 J.m(-1), P < 0.001) and 20% greater relative Cw(kg) (3.48 +/- 0.95 vs 2.91 +/- 0.94 J.kg(-1).m(-1), P = 0.046) than NW. Although PSF was not different between OWOB and NW (P = 0.626), Cw(kg) was 8% greater in OWOB at + 10% PSF (P < 0.001). At PSF, OWOB spent less time in single-limb support (33.1% +/- 1.5% vs 34.9% +/- 1.6 % gait cycle, P = 0.021) and more time in double-limb support (17.5% +/- 1.6% vs 15.4% +/- 1.4% gait cycle, P = 0.026) than NW. In OWOB, at PSF, Cw was correlated to impulse (r = -0.57, P = 0.027) and stride frequency (r = 0.51, P = 0.046). Conclusions: Excess body weight is associated with greater Cw in older adults, possibly contributing to reduced mobility in overweight and obese older persons. (AU)

• Processo FAPESP: 11/11639-7 - Efeito de Duas Modalidades de Treinamento com Exercícios Físicos no Equilíbrio, no Torque Muscular e em Variáveis Biomecânicas e Metabólicas Durante a Marcha de Indivíduos Idosos
• Beneficiário: Nise Ribeiro Marques
• Modalidade de apoio: Bolsas no Brasil - Doutorado