RJ, looks like a session and a half. Crossing and recrossing the threshold the whole way.
Makes me think of my own most ambitious session, 21 x 3 mins at 5:30's off 1 min recovery (standing still mind). The benefits in this case were debatable.
What is not debatable is that the (cheap) exercise bike I bought 2 months ago is no longer up to the job. I've become too strong for it.
Advice: Do not buy one of these machines if based on magnetic resistance.
The problem is that the resistance at the Max setting is feeble. My mistake was to assume these were better than a flywheel job. I've discovered since that this problem is typical of the machine type.
So a machine with an 18kg flywheel is on its way.
Good for smashing out lactic acid forming intervals with none of the impact.
Edited: 26/01/2013 at 12:57