Disc 27 Incline Curls

[Jazcam]

I just finished this workout and WOW

While doing the incline curls on the ball I wasn't able to fully extend my arms. Does this happen to any of you?

Once I saw the guys doing the same incline curls on the weight bench, I tried it and had to drop down in DB weight. I think I like this method better because I was able to do a full extension.

I was also wondering why were the breaks between exercises so short
(60 sec)?

Thanks

 

[SNM Videos]

The breaks are shorter because your alternating between three different muscle groups instead of doing sets within the same muscle group.