Yesterday it was raining so with no ability to do yard work and no desire to ride in the rain I locked in to the trainer. I had a different idea because I wanted to weight lift as well I came up with this and I'm just wondering exactly how effective this is.

1. Ride for 2mi (cadence at 95+)
2. 1 set of 10 reps on the weight machine (I would cycle threw 5 upper body exercises doing a different one every 2mi of riding)
3. Repeat

I didn't break between riding and weights. My trainer is right next to the bench and I can switch the bench exercises in no time. I had a TV on to keep my mind busy and just went at it to see how long I could last not stopping at all. 2mi isn't much but I haven't worked up to long rides yet and I was just playing around with this idea. I ended up doing 34mi all together (2 X's as long as my farthest ride before this; HRM says 2590cal burned over 2.5 hours:D)

Now for my question:
On one hand my HR stayed up (65-75%) and I was sweating like mad (drank a ton of water). But I'm wondering what the over all effect is on my muscles. Are they getting a proper workout? Lets say I'm on the bike and a wave of blood is sent to my calves as soon my body is feeding them suddenly I stop using them and start using my arms doing curls. Now the extra blood flow is suddenly needed in my upper body. Am I still working the muscles in an effective manor, or am I starving them? I'm just trying to find a way I can keep things interesting so I will keep exercising longer. If you read all of this I thank you.

As long as your heart rate is elevated then you're getting a workout.

A lot of advanced work outs, e.g., especially military circuit training, while mostly pure cardio work use an exercise, run, exercise, run,...etc system. If it works for them then...

You're helping them.

Don't forget core exercises and lower body weights (maybe as a different workout on a different day?)

Break it up between high intensity,low weight and low intensity recovery,just like riding ;) HR in the 70% zone most of the time and spike it into the 85% zone to build aerobic capacity.

Your doing circuit training, basically. It's good for you as long as you vary your workout and intensity...and don't overwork any muscle groups.

Thanks for the responses. I felt I was doing good but I talked to someone today and they where saying that there was a chance I was starving my muscles of oxygenated blood. I do plan on changing things up some now. Going to be adding more and changing around the weight lifting. Also I'm not lifting really heavy I'm lifting enough weight that it would take at least 50reps straight to burn me out. I'm looking to tone and burn fat not bulk up just yet. Besides the weight machine I'm using doesn't have enough weight on it to add bulk to me (125lbs).

...I'm looking to tone and burn fat not bulk up just yet...

this book helped a lot, assuming you're going to be using your heart monitor, when I was originally trying to get fit and lose fat.

The Heart Rate Guidebook to Heart Zone Training by Sally Edwards

http://www.amazon.com/Heart-Rate-Guidebook-Zone-Training/dp/0970013027/ref=sr_1_3?ie=UTF8&s=books&qid=1203552170&sr=1-3