Hello, You have not mentioned how old is the scaphoid fracture and for how long your hand was in a cast. Scaphiod fracture is unique in itself because it goes undetected and because of its blood supply, the healing take time. The only thing I would be afraid of is that you have not given enough time for your scaphoid to recover before starting work outs. Please do exercises under supervision of a physiotherapist or orthopedic surgeon. Hope this helps.