1 If you're a beginner, start with 3 to 4 days of the cardio exercise of your choice, working at a level you can handle.  Add time each week to work your way up to 30 to 45 minutes of continuous exercise.
Center turkey breast on rack. Transfer to oven, and roast until juices run clear and an instant-read thermometer reads 165 degrees when inserted into the thickest part of the breast, about 1 hour and 20 minutes.Transfer to a platter, and let rest for 10 minutes before carving.enter turkey breast on rack. Transfer to oven, and roast until juices run clear and an instant-read thermometer reads 165 degrees when inserted into the thickest part of the breast, about 1 hour and 20 minutes.
Step 3: Place your turkey breast on the grill, skin side up with a heat proof drip pan filled with about a 1/2 inch of water strategically set beneath it to catch all of the drippings. Step 4: Check your bird, drip pan and grill about 30 minutes into the cooking time. 4-5 lb. turkey breast should take about an 1 hour and 15-30 minutes to cook, but time will vary depending on the size of the bird and the grill temperature fluctuations.