I will say,
Donna, I worked out with a trainer while living in MA. I had the same trainer for years and she never ever yelled either BUT that being said I was paying her BIG $$$. These contestants KNOW, know very well what is ahead of them. They have watched all the past seasons with Jillian and Bob and they are paying nothing to be a part of the show and IF they LOSE all their weight, they will win allot of $$$$. I think that is the difference. Also so many contestants this season
(and past seasons) lost in excess of 100lbs....so I am soooo thinking the yelling WORKS!!!
I absolutely feel this show does NOT need to be 2 hours.........way to many commercials and way too much repeating when coming back from a commercial...........boy do I love my DVR for THIS show. I tend to do allot of "ffing" through BL!!!
Also, they have many MD's and professionals on the campus that do indeed monitor their health regularly.

One of the MD's, the one that spoke to Jerry at the finale and told him that he might not have won the big money BUT he indeed won 24 years of his life BACK,
that MD was a former BL contestant himself!!!!

Now he is their resident MD!!!!