Using Tabata protocols

[nadfubach]

I was thinking of using thrusters and push-ups in tabata style for the short interval portion of SFP 2.0.

The typical tabata protocol is 20secs of work followed by 10secs rest for 8 rounds. This is a total of 4min. Both SFP1.0 and 2.0 have an interval period of 5-10 min.

Should the rounds then be increased to 10 for each exercies in order to reach to 5-10min mark?

Also, I understand that SFP1.0 and 2.0 are more taxing. Is there a specific caloric deficit or level of carb intake wherein SFP1.0 and 2.0 are no longer appropriate/safe?