[lizxrice]

Your bike sprint workouts sound similar to Tabata cycling intervals: http://britishcyclesport.com/2013/training/tabata-intervals/

Got to agree workouts like that are really hard!

[evo_9]

Thanks I hadn't seen this before.

I got the idea from a BBC program on fitness, I think it was a Horizon's where they had the host doing these sprints and they equaled much longer endurance workouts. I was dubious at first but the results seem to hold up.