Promoting physical activity for elders with compromised function: the lifestyle interventions and independence for elders (LIFE) study physical activity intervention.
The Lifestyle Interventions and Independence for Elders (LIFE) Study is a Phase III randomized controlled clinical trial (Clinicaltrials.gov identifier: NCT01072500) that will provide definitive evidence regarding the effect of physical activity (PA) on major mobility disability in older adults (70-89 years old) who have compromised physical function. This paper describes the methods employed in the delivery of the LIFE Study PA intervention, providing insight into how we promoted adherence and monitored the fidelity of treatment. Data are presented on participants' motives and self-perceptions at the onset of the trial along with accelerometry data on patterns of PA during exercise training. Prior to the onset of training, 31.4% of participants noted slight conflict with being able to meet the demands of the program and 6.4% indicated that the degree of conflict would be moderate. Accelerometry data collected during PA training revealed that the average intensity - 1,555 counts/minute for men and 1,237 counts/minute for women - was well below the cutoff point used to classify exercise as being of moderate intensity or higher for adults. Also, a sizable subgroup required one or more rest stops. These data illustrate that it is not feasible to have a single exercise prescription for older adults with compromised function. Moreover, the concept of what constitutes "moderate" exercise or an appropriate volume of work is dictated by the physical capacities of each individual and the level of comfort/stability in actually executing a specific prescription.
Department of Health and Exercise Science, Wake Forest University, Winston-Salem, NC, USA.
W Jack
WJ
Rejeski
Robert
R
Axtell
Roger
R
Fielding
Jeffrey
J
Katula
Abby C
AC
King
Todd M
TM
Manini
Anthony P
AP
Marsh
Marco
M
Pahor
Alvito
A
Rego
Catrine
C
Tudor-Locke
Mark
M
Newman
Michael P
MP
Walkup
Michael E
ME
Miller
D061725:Accelerometry / Q000706:statistics & numerical data; D000368:Aged; D000369:Aged, 80 and over; D015444:Exercise; D005260:Female; D006293:Health Promotion / Q000379:methods* / Q000458:organization & administration; D006801:Humans; D057187:Independent Living; D008297:Male; D051346:Mobility Limitation; D036301:Qualitative Research; D040242:Risk Reduction Behavior; D017678:Sex Distribution
accelerometry; aging; compromised physical function; older adults; physical disability