Workout plan for the winter

My program for the winter months is to walk/run indoors on the treadmill three days a week and pedal the stationary bike and lift weights on at least two other days. Saturdays I rest, Sundays I walk more than one hour.

I'd like to work up to an hour for each workout during the week and two hours on Sundays. My main goal is to lose weight before I begin any serious running again. The plan is to get down to my high school weight as a 65th birthday gift to myself. Which means I still have 50-something pounds to go.

But the most important goal is to avoid injury and layoff in order to continue exercising, so easy does it, eh?

Ride 15 mins stationary bike, Weights 15 mins