Patients with intermittent claudication due to peripheral arterial disease (PAD) experience muscle aching during walking secondary to ischemia. The purpose of this study was to examine the effects of low-intensity pain-free exercise (LIPFE) on functional capacity of individuals with PAD. A total of 12 participants with PAD underwent training on treadmill for 6 weeks, twice a week, for about 45 minutes. Outcome measures included walking distance (WDI), walking duration (WDU), mean walking rate (WR), estimated oxygen consumption (EVO(2)), metabolic equivalent (MET), estimated total energy expenditure (ETEE), and estimated rate of energy expenditure (EREE). Mean improvement of WDI, WDU, and MWR were 104% (an addition of 1.0 km), 55% (an addition of 13.3 minutes), and 41% (0.9 km/h faster), respectively. Mean improvement of EVO(2), MET, ETEE, and EREE, were 20%, 20%, 80%, and 20%, respectively. In conclusion, it appears that LIPFE training is an effective intervention for individuals presenting with PAD.