This article states that Harold Johnson said he didn't use weights http://www.eastsideboxing.com/weblog...p=16558&more=1
Johnson couldn’t abide alcohol and was quick to point out that weights played no part in carving his outstanding muscular definition. “The only weights I lifted were dumbbells for shadow boxing to put power in my punches. I was told I could hurt myself lifting weights, so I didn’t. I didn’t want to get injured.
“It’s no good for fighters – it makes you slow, muscles you up. They might give you power, but your opponent will see your punches coming. What’s the point in having power if you can’t hit nobody? People were sure I lifted weights, but I never.”