Yeah I blew my back out a couple years ago. If I smoke during the day, I can still work pretty much all day long and do most things I did before the injury. But there is a cost to that.....when the day is over, the back is toast and I am pretty much couch bound in the evenings and the only way I can repeat this the next day is to hit a heavy indica at night in conjunction with my canna capsules to ensure I get my full 8 hours of sleep. As long as I get a good nights sleep, I wake up and back feels good enough to torture again the next day lol. Not really of a fan of being 'stoned' as I much prefer the 'high' with sativas (just smoked some Malawi x Neville's Haze) but without the potent indica at bedtime, I toss and turn from the back pain and can't do shit the next day.