Cardio question

[63190]

Is it bad to throttle your heart rate up and down? Let me try to explain:
I went for brisk walk. I could only get up to 110 on my heart rate monitor. So then I jogged a bit and it went up to 170. So started walking brisk again and it came down again. I'm 27 so it should be between 125 and 138, right?
So, I watched it and jogged again. But the thing is to slow to keep up. So I started walking and it shoots way up again.
So I do this next. I jogged for the length of a house and walked. It shoots up to 140 and then comes back down. When I get to 125 I start jogging again for the length of a house and then walk again. This gets it up to 138 and then I see it come down to 125 and jog again. Will this jog-n-walk approach work as well for that crucial 45 min cardio at 65-70% for fat loss (lypolisis*sp)? I only did 30 because I'm a hard gainer. But lately what I've gained has shown up on my waist.

[Hypertrophy]

No, steady state heart rate is best. When your HR fluctuates up, you are increasing your relaince on carbohydrate metabolism. Therefore, when oxygen supply = oxygen demand, Fat is the predominant fuel source.

[63190]

So then I have to go to the gym on my non-lifting days to ride a bike, walk a mill, or stair master?

[Hypertrophy]

Have you tried power-walking?
Maybe try and "shag" it. It looks like a walk/jog. Extremely slow jog.

[63190]

"Shag"? I have not tried power walking. Should I start out with my mom's 3lb DB's? I think I have seen an old man at work extremely slow jog before. Some of the other guys said that it looked funny. As if you could pass him on a brisk walk/speed walk. I was speed walking and like I said, only 110 BPM.

On the plus side I've lost half an inch in my waist and my weight today was 200 even. Yay!