Forcing a dog to accept anything it clearly does not like is always risky. I'd wait to see what your trainer has to say, he/she'll be able to assess body language and judge just what the dog is telling you.
Some dogs just don't love feeling restrained. Apsel has a similar yet milder reaction when I restrain him in any fashion. I haven't bothered to correct the squirm, because I learned to trade hugs, for him basically sitting in my lap. In situations like this, I think if one party compromises, it is only fair for everyone party to compromise.
If you start slowly, small steps may even get you all the hugs you've ever wanted eventually, but full immersion is not going to be a recommended route.
Apsel der Schwarzbar -- Dark Sable -- 10/31/2013