I’m not so sure I agree there. Having pulled many a muscle, I don’t think you can do it without realizing it.
When I first clicked the link, I was expecting to read something to the effect of: “I just started working out again after a long break” or “I just joined a gym and lifted on my own for the first time” In both of those cases, almost everyone, even people who are in fairly reasonable shape, will get very very sore after their first chest workout. The chest is one of those muscles that is reasonably strong and even beginners can push themselves to lift a fair amount of weight the first time without too much immediate burn. However, the two days after that workout will usually leave them nearly incapacitated. Those chest muscles will tighten up to a degree thats shocking. By day four its usually much better and after the third chest workout (usually spanning three weeks) that soreness becomes much much less post-workout.
So, I’d ask, do you lift chest on a weekly basis? Or have you been going to the club and focusing on cardio over the 18 months prior? If you’re just beginning to weight train and just did a reasonably intense chest workout (and frankly they often don’t seem intense as you do it) I’d chalk it up to fairly typical soreness from overtraining. Yeah, I know it makes the soreness you’ve had from other workouts look like nothing, but there’s just something about the chest that seems to do this.
Is the soreness on both sides? I know one side is more swollen, but are the sypmtoms pretty much the same on both sides, if not quite as intense?
If my theory is correct, and depending on the kind of machine you used, you could very likely have this uneven soreness on the right side. If you’re a righty, and you used some type of unilateral press machine, your tendancy would be to compensate by pushing harder with your dominant arm. This could create that unbalanced soreness. Also, if you’re a lefty and you used an isolateral type workout the weaker side would be lifting a relatively heavier load than its used to and could create the uneven soreness.
So, I guess the short version is this:
Do you work chest on a weekly basis?
When did you do it last before this time?
Did you change the workout this time, or do notably more?
What type of excersizes and equipment did you use?
Am I correct in assuming that you didn’t notice any immediate pain during the workout?
Is the “swelling” isolated to one region? If the entire body of the muscle is simply “fuller”, thats typical after a workout. If its isolated to the region near a joint, or has a pronounced inflamed location it could indicate injury.
Another possibility is that you pinched a nerve on the one side. The overall soreness could be typical workout pain, but the remarkable soreness on the one side could be a result of a pinched or irritated nerve.
Whatever the case, if there’s no discoloration, and the pain is tolerable let it go for a few days and if it doesn’t improve see a doctor.