I now do a combination of Stay Slim/Stay Young every other day. On the other days, I use my NordicTrack. When I do the NordicTrack, my pulse goes to about 155 (I'm 46). But when I complete the strength training, my pulse is only about 70, which is my average pulse rate. Is this normal for strength training?

Your heart rate response to the aerobic exercise and to the strength training is perfectly normal. During a strengthening workout your heart rate should be just slightly elevated. It returns to the usual resting rate by the time that you measure it. Strength training doesn't place a great demand on the heart. That's why you need to do aerobic exercise as well (which you're doing) for optimal health.