I'm really having problems putting on enough weight when it comes to squats/lunges. There's no backrack at our gym and I simply don't have enough upper body strength to get a bar with the amount of weight i need over my head. At the moment I'm using two dumbells with 18kg each (so a total of 80lbs) + adding weight underneath my heals to try and make it harder but squats are still too easy. We do have dumbells that you can add weight yourself but those 18kg are hard enough for me to hold on to!!
Today I was doing lunges and I strapped on 8kg to my waist with strap on weights and then held 14kg in each hand (i'm doing the NROLW and lunges come right after a lot of shoulder work so I can't handle the 18's then) and even with the extra 8kg I didn't feel a difference. Now, we have strap on weights that would go up to 16kg around my waist that I'll try next time but still that's only a panacea.
I'd really like to hire a trainer (and I found the perfect guy who could definitely lift the bar+weights up to my shoulders because I've seen him do it for others) but that won't happen for another couple of a months.
Any ideas on how to make squats/lunges more difficult with the limited amount of weight?