2 x 20s

Road Red
Road Red Posts: 232
edited October 2009 in Training, fitness and health
Looking to build endurance over the winter to improve climbing ability for longer sportives.

I reckon on mixing my turbo work between interval and 2x20 sessions.

I think I know what 2x20s are but could someone define them for me please. I dont have a power meter, I use a heart rate monitor only.

Thanks

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