Well, it's supposed to be 65% of your 1RM, so I'm not sure if that counts as "heavy" but I'll be damned if I could even do 65%! I know my 1RM for squats is not 100 pounds, yet I was doing squats at 65 pounds and found that hard enough. And burny enough. Every single set was accompanied by lactic acid buildup burn, my favorite.
Nausea came & went a few times but I never felt like I was going to physically throw up.
I can't wait for today's workout to be over. :-P