Physical activity declines with age for healthy older adults, and for people with COPD a change in the downward trajectory could be very important. At the end of training the observed increase in LPA for the SE-UBR group was not statistically significant when examined in isolation, but the two control groups experienced a decrease in LPA. The mean group differences (SE-UBR versus ED-UBR and ED-Chair) were much larger, and this illustrates the potential of this intervention to reverse or slow the rate of decline in PA. Others have observed comparable decreases in PA over relatively short periods of time (1236 and 3637 weeks). The 12-month follow-up demonstrated a similar trend, but at that point the study was underpowered and the variability in PA was high, suggesting that individuals responded differently. Ultimately, a much larger sample will be needed to examine subgroup differences and to identify those who benefit the most from this type of intervention.