how much intense cardio is too much intense cardio?

[sunsdaughter]

hi cathe & all!
for the past few months, i have found that i tend to gravitate towards the intense cardio workouts, especially those that are interval/hiit. is it too much to do in one week, say, hiit 30/30, core cardio circuit, and an imax workout? my joints are ok, but sometimes my right knee stiffens/locks up.
interested to hear your thoughts!
thanks!

 

[kariev]

Not Cathe but I don't think that what you listed is too much. However everyone is different and recovery rate after an intense workout varies. Having a day of lighter activity inbetween these intense cardio sessions would be a good way to balance things out. Just keep listening to your body and it will let you know if and when its too much.