HIIT in a gym?

[Bobby Digital]

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OP doesn't appear to be placing greater and greater demands on his body or have any ability to do so.

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[img]/images/graemlins/confused.gif[/img] I'm sure I could increase intensity but do I really want to be doing more than 15 sprints per session? I thought the idea was to keep the sessions under 30 minutes. Especially if I'm squatting 3 x per week.

Anyway thanks for the suggestions, gonna probably try the rowing machine again as that seemed to be the best option. Maybe some kind of rope jumping/calisthenics combination.

Didn't mean for this to turn into a "that is or is not really HIIT argument." Concern was mainly that I'm going at it on those machines hard and I'm not getting the oxygen deficiency I guess you could say, that I get from sprinting.