Join Date: Apr 2010
Location: Fredericton, NB, Canada
Bikes: 2010 S1, 2011 F75X
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Interval training isn't a very good way to build technique - as you're more interested in the power and speed, than the smoothness/technique of your pedalling (although the former helps with the latter).
The great thing about the Spinerval DVD's is that you choose the gears you want. If you can't hold the gears suggested by Tony, then just use a gear more comfortable for you. As you get stronger, you'll get closer to the perscribed levels.
I personally have 27.0 and 29.0 - both are amazing workouts for the beginner to absolute expert.