There's a requirement to life a hundred pounds? Sounds fishy. There are plenty of healthy adults who can't do that.
TIme to get a lawyer.
This answer does not constitute legal advice and does not establish an attorney-client relationship.
I'm unclear if you were hurt on the job due to a traffic accident with a third party (driving a truck which is struck by another vehicle), or if you were hurt on the job with no third party involvement (for example, loading the truck, or involved in a single vehicle accident).
In either case, you should have a worker's compensation lawyer. Maybe you think the WC insurer is "being nice", but only because you don't know your rights are being stepped on. In MA (and most other states) workers comp lawyers work on a contingent fee, they only get paid if they win; most of their fees are paid by the insurer, or deducted from a lump sum, so you don't have to reach in your own pocket.
If there is a third party who is responsible for your injuries, you also need a personal injury lawyer. some, but not all, worker's compensation lawyers also do related personal injury claims, or they can refer you to a PI lawyer they trust. The PI lawyer also would be on a contingent fee basis.
Get a lawyer. If your employer is based in IL, probably one from there for WC. If there is a 3rd party, it may be necessary to get a PI lawyer from the state where the accident occurred. Use this web site to find one or both. Look for the WC lawyer 1st.
The foregoing answer does not establish an attorney client relationship, is not confidential, and should not be relied upon in place of an actual consultation with an attorney. Mr. Boone is licensed to practice in Massachusetts, before the U.S. Tax Court, and the Federal District Court of Massachusetts. Most initial consultations are free. Further information is available on my profile and at www.boonehenkofflaw.com.