Bacardio,
I used Cosgrove's Afterburn system last season (am currently on IR) and it made a big difference in being able to leg out those third-period shifts on defence.
I've never done Tabata ... seems a little more intense than necessary, though.
Afterburn gives you a one-minute blast with two-minutes at a steady pace. And it builds up nicely from 15 minutes to a half hour over a few weeks.
You might want to give that a try and see if you notice any difference.
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