Try this fast paced workout that combines weight training with cardio twice a week on non consecutive days to build endurance and strength.  Take 20 second rest breaks after each set unless rest period noted otherwise.

START OUT DOING THE WORKOUT JUST ONCE.  WHEN YOU FEEL READY, PERFORM THE WORKOUT TWICE IN A ROW.  ONCE YOU CAN PERFORM THE WORKOUT TWO TIMES CONSECUTIVELY, YOU CAN ADD ADDITIONAL CHALLENGE BY INCREASING YOUR WEIGHT AMOUNTS.