I applaud you for even getting out there and doing them. Intervals suck so bad.
I had decided that I was going to start them this week, but reading your post has made me reconsider.
I am currently reading a book about those that were the first to break the 4:00 minute mile and the training they did was insane. Bannister for 2 months only ran intervals. Everyday, no rest days. That is pain. He was also a medical student at the time and putting in 16 hour days at the hospital.
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