I have invented several exercise devices, who should I contact in the fitness industry?

I don’t have it patented yet and would like to work with a trusted company in partnership to get it polished and manufactured. The first one deals with the ease of mechanics in the arms and the wrists. The second and third ones deals with the core, balance, and strength. And both are made to be portable.

I would like to work with a stable and trusted company. Any suggestions as to who I should contact would be much appreciated.

Thank you friends.