That sounds like 90 minutes of constant cardio intense cardio. 300 reps there!
I wouldn't be able to ask anyone for steem power. I'm growing enough and have more coming in the pipeline as I earn it weekly. Your offer is incredibly generous and thoughtful, but you should enjoy the benefits of the SP you're earning and use it on the platform for your benefit. If anything, the more SP you have, the more you can help others by upvoting their workouts, etc..
Major salute for your idea. Thank you.