Aerobic cross-training refers to using two to three different types of aerobic exercise during an exercise session, you may start your plan with 60 minutes:
20 minutes of walking or jogging;
20 minutes of biking;
20 minutes of rowing.
Something simple like a ten minute walk followed by ten minutes with an exercise video. Gradually build up from there. You can use in your cross-training program: walking, jogging, biking, rowing, stair climbing, swimming, exercise videos, etc. Any combination of aerobic exercises will do. You simply go from one to the next with very little time between them.
Some benefits of cross training for your health:
1) Gives joints, bones, and muscles a much needed rest, making them fresher for your next run.
2) Still increases your heart rate, so you still get a good aerobic workout even on the days you don’t run.
3) Breaks the routine.