My feet are wrecked, so I have to get creative to do cardio.
The gym I own has several recliner bikes that can have the tension adjusted within time intervals. It also has some built in programs to raise the challange level. I can push with the heels and arch and stay away from the toes.
I work out at 5 AM, so I use the bike first as I sip some coffee, eat some aspirin and my vits. I turn on the news. By 5:30 AM I'm ready for the weights.