Starting BJJ on Wednesday at a local MMA gym that has a decent enough weights section.
Previously I did all my weight training at a separate gym in the mornings but new work schedule means that I can't fit that in anymore.
Really the only time I now have to lift weights will be the hour before BJJ class and I'm wondering if this is going to have a detrimental effect on my learning?
I suppose my main concern is being too tired during class if I've just lifted a load of weights. However, I'm sure I also read that lifting before BJJ may be beneficial as your body will be too tired to rely on its strength to get you out of shit and you will need to learn to be more technical? Thoughts? 
You'll hate life for a while, but you'll get used to it. It's only a problem if you decide it is. 
I'm skeptical...I think you'll be prone to injury.
Your limbs won't react the way you'd expect and you won't land or move as you might hope. You'll tell your foot to base out, but it'll be slow and you'll land on your shoulder, etc.
Yes you should learn to roll when you're fatigued. However, if fatigue throughout your rolls, it's a more gradual process that your mechanics can adjust too. You're breathing, sweat, your style and decisions will all take that into account. You will also be expending your energy more similar to the rest of the class.
Meatgrinder -I've been lifting before class for a while and I've never experienced these things. Lifting is great for injury prevention, even if it's done before class.
I'm skeptical...I think you'll be prone to injury.
Your limbs won't react the way you'd expect and you won't land or move as you might hope. You'll tell your foot to base out, but it'll be slow and you'll land on your shoulder, etc.
Yes you should learn to roll when you're fatigued. However, if fatigue throughout your rolls, it's a more gradual process that your mechanics can adjust too. You're breathing, sweat, your style and decisions will all take that into account. You will also be expending your energy more similar to the rest of the class.
I actually lift weights DURING class; I have a squat rack in the corner of the mat which I do biceps curls in, between rolling.
shen -
I actually lift weights DURING class; I have a squat rack in the corner of the mat which I do biceps curls in, between rolling.
yeah but that's just to look pumped for the after class pic with the tough guy pose. That's perfectly understandable.
OK I did my first two classes fresh with no weights before and then my next two classes I did some light work before, mainly kettlebell and bodyweight stuff like chins/dips etc.
Didn't notice a huge difference to be honest but that may just be where I'm new and not pushing myself as some of the other guys in class.
Next I'm gonna try and do some heavier weights and see if that has a bigger impact but so far it seems OK.
If you lift before class you're a nut job.
Robobear -People still lift? I do animal movements twice a day two times a week and eat a strict Gracie diet. I love papaya and cream cheeseIf you lift before class you're a nut job.
We had physics seminar about additional training for bjj where they had pulled some studies about bjj and how the matches are compared to wrestling and judo.
Based on those the recommended emphasis was bit different than on those sports as in bjj you do lot more but with lesser overall pace. I'd need to read the material again so I could explain it in English better.
Anyway we discussed about doing training before/after class and they recommended to do it after and not before. One thing being learning aspect whether it's drilling or new stuff but your body might not memorize them so well anymore.
Can't say how it would be since I've always done lifting / condition either after class or completely different session.