I'm guessing you are pulling less than 80 lbs. Probably closer to 40. The article mentions that 20 a minute wouldn't be an issue at this weight but the longbow

I'm guessing you are pulling less than 80 lbs. Probably closer to 40. The article mentions that 20 a minute wouldn't be an issue at this weight but the longbows in question where over 100 lbs and often 150 lbs pull. This is what they are saying is impossible to sustain at a rate of 10-12 per minute. You might be good the first minute but would drop off quickly after that. For those not used to the sport, most untrained adult men have issues pulling back 70 lbs more than once. With a little practice this becomes "easy" but there is definitely and learning and strength curve.