At the end of the day, the injury could happen to anyone regardless of training camp. I've been around personal trainers my whole life, workout regularly myself, I've seen these professional athlete workout routines... it's no secret.. it's not top secret information.
It's fine to train w/ personal trainers and things like that. I don't and probably never will but I understand why people do. These athletes are always looking for an edge and Tim Shaw has a good rep.
With that being said, you still need to train and prepare by practicing the sport you're about to play in realistic scenarios. That's just common sense.
Do boxers not spar?
Do Olympic swimmers not swim?
Do wrestlers not wrestle?
Do UFC athletes not fight?
Do runners not run?
I think we all know the answer to these. Football is no different.
The resistance he wasn't getting in Florida was from a defender that was playing him hard and really trying to stop him from getting where he wants to go. I'm sure he had other athletes attempting to offer resistance, but they probably weren't NFL trained cornerbacks that have been playing defense their entire football lives. That's what Mike missed and no amount training can simulate the movements that you may have to make during an NFL game during a one-on-one drill in pads or without pads. You need to be getting pushed and bumped by potentially 1, 2 or 3 guys on one play. You may have to break a route off quicker than expected due a 240 pound linebacker bearing down on you. There is no way to simulate a defense that doesn't want you to go where you want go until you step on the field.
I'm sure Mike worked hard and if all he had to do was run in a straight line he may never pull a groin or hammy. Once you have to start running real routes to avoid a good NFL defender then the dynamics of what you need to do physically change and that's when strains, pulls and sprains occur.
He's injured, he may have been injured regardless of hold out, the hold out had very little to do with it, missing live football scrimmages and games probably had more to do with it than anything.
I will point out that while Wallace is injured and we are wondering whether he will play on the Sunday; the player that the Steelers did reward with a big contract is practicing, will play and leads the team with 11 receptions. Appears to me that they made the right investment.
Is Wallace injured? Yes.
Did that have anything to do with his holdout? I guess you can think so, but there is no evidence to support that.
You could just as easily blame the groin injury that Isaac Redman had on Mike Wallace's holdout as well...