I believe the original one day workout (probably began in the early '50's) was one moderate set of triceps/biceps every hour for at least 8 hours. It was more concerned with getting a light pump and keeping it all day, rather than working the arms too hard every set/hour. You wanted a new supply of blood to insure fresh proteins and other nourishments into the muscle cell's. With a normal pumping workout (arms for example) of say 3 to 6 set's, you can only get so much blood into the area and that's
all during the workout. Doing any more set's will be a waste of training time. It's like putting a glass under a running faucet. After the glass is filled you can't get any more water into it. With a spaced out workout, like once a hour, a fresh supply of blood can be absorbed into the muscle cells. And hopfully bring the potentional of more arm growth.
Back in the day, quite a few guy's I knew were doing the original one day arm program (some did it for delts & calf's with good results...at times, the calves seemed to respond better than the arms did and a 1/2" was not out of the question for some trainee's). Want to take a measurement at least two day's after to check any true lasting arm progress and to measure in the morning after waking up, for a true reading. Usually 1/8 inch was the average gain, some made more and some less. Gaining 1/4 to 3/8's was a minor miracle for a few natural gainers. These guy's would take high grade protein & milk shakes all day long. Must keep those calories up also. Amino acid supplements were also popular. A 1/8" may not sound like a lot but during a all day arm program twice or three time a year can add up in the long run. For most BB'ers patience goes along with working out.
A lot of guy's who wanted to improve their lifts would take a couple of day out a week and just do that lift. In college, a friend would set up a BB in the laundry room and did cleans & presses (3 reps) just about every hour. That lift did improve greatly. Good Luck.
