ok folks. it's COLD around here, and i can't always go hiking. so that means that i have to go to the gym. not a big deal, but there's a slight hitch.
the treadmill is fine, but i can't go faster than about 3 miles an hour because i have bad knees [torn cartilage in both, plus severe arthriritis in one, if you believe the MRI, but since it doesn't bother me except when i give it a pounding, i generally ignore it].
soooo. that means increasing the angle. i started doing the hill climbing program, and at level 7, i BARELY made it to my target HR and for only about a minute. the trainer suggested that i try the stair climber, which scares my knees [doc says that i can't use those stairmaster machines and i don't see how much different the stair climber would be].
any thoughts for getting a good cardio interval training going?
the bike is ok. but frankly, i find it VERY boring. time goes faster for me on the treadmill than on the bike. if i HAVE to, i'll do intervals on the bike... but i hoped all you wise folks would have some words of wisdom for me....

I set it at a low skill level (I like to start slowly) and do the aeorbic x-train. That has me pushing and pulling with my arms, going very fast (for me) for one minute, using my legs only which is good for my balance because I can go slow and focus on not falling, and then reversing the direction for a bit. The ETM aerobic x-train changes the workout every two minutes, so that keeps me entertained. Maybe focused would be a better word.
I go back on Wednesday for a work out and then again on Thursday for a meeting of the race club to be followed by a work out no doubt. I am going to see if I can spot an arctrainer.