You're asking ME about exercise??! I have next to no knowledge compared with Pete! All I know about HIIT is that it is supposed to increase VO2max if you're a responder (not everyone is). I presume increased VO2max would improve endurance?
I found these papers which may be useful:
http://www.ncbi.nlm.nih.gov/pubmed/23899754
http://www.ncbi.nlm.nih.gov/pubmed/16825308
http://www.ncbi.nlm.nih.gov/pubmed/12076176
Good luck with it!
I found these papers which may be useful:
http://www.ncbi.nlm.nih.gov/pubmed/23899754
http://www.ncbi.nlm.nih.gov/pubmed/16825308
http://www.ncbi.nlm.nih.gov/pubmed/12076176
Good luck with it!