Originally Posted by man-of-10
Do you know anything of the ideal time for the oxygen deprivation?
I have no clue about smooth muscle cells. Maybe someone can look through the literature. I will try when I have some more time and if I find anything, I will post it. For skeletal muscle hypertrophy some protocols used:
One study:
"For the acute study (Experiment 1) and the resistance exercise training protocol (Experiment 2), the contraction bout consisted of bilateral knee extension at 20% of the 1-RM. Subjects performed a set of 30 contractions followed by a 30-sec rest, followed by 3 sets of 15 contractions each with 30-sec rest intervals between sets; a total of 75 contractions requiring about 8 minutes. Individual contraction duration was 4 sec with a 2 sec:2 sec shortening-lengthening contraction duty cycle controlled by a metronome. For the LIT-BFR group, blood flow was restricted by a pressure on both legs during training. On the first day of training (Day 1), the belt pressure was 160 mmHg, and the pressure was increased 20 mmHg each day until a final belt pressure of 220 mmHg (Day 4) was achieved [Abe et al., 2006]. The restriction of muscular blood flow was maintained for the entire exercise session, including the rest periods. The belt pressure was released immediately upon completion of the contraction bout."
Second study:
"Training was conducted twice per day (morning and afternoon sessions, with at least 4 h between sessions), 6 days/wk for 3 wk. Following a warm-up, the subjects performed walking (50 m/min for five 2-min bouts, with a 1-min rest between bouts) on a motor-driven treadmill (Fig. 1). The walking speed and duration
remained constant throughout the training period. Subjects in the Kaatsu-walk group wore pressure belts on both legs during training. Before the Kaatsu-walk training, the subjects were seated on a chair, and the belt air pressure was repeatedly set (30 s) and then released (10 s) from initial (120 mmHg) to final (160 mmHg) pressure (described as acute Kaatsu-walk)."
http://www.jsta ge.jst.go.jp/ar … jktr/4/1/1/_pdf
http://jap.phys iology.org/cgi/ … rint/100/5/1460
Originally Posted by man-of-10
I’d assume slight constriction for long durations would work better than total constriction for relatively short times.
Good question and I have no clue but the former is better for safety reasons. One wants stimulus for growth, not cell death.
Originally Posted by man-of-10
Additionally, since we are wanting the built up metabolites to draw water into the cells, would it be ideal to have a blood filled glans at the time, to provide the water for this process? One disadvantage I can see with this is that b having a blood filled glans you are effectively giving the glans tissue cells a lung-full of oxygen to use, so we’d have to hold the constriction for longer in such a case I guess.
With skeletal muscle, contraction themselves increase the build up of metabolites. Not sure about smooth muscle? Maybe somebody else knows how to maximize metabolite built-up and hence cell/muscle swelling. Again, there’s a lot of speculative stuff based on studies concerning skeletal muscle hypertrophy and even there the mechanisms are speculative. An interesting quote concerning possible mechanisms for skeletal muscle growth:
"In contrast, it could be hypothesized that the changes muscle CSA/volume are the result of increased muscle water; either in the inter- or intravascular
space or within the muscle itself due to the BFR technique. Indeed, resistance exercise with a cuff belt leads to venous pooling and significan cell/muscle swelling."
Starting Size: April, 28, 2010: NBPEL-7" Girth-6" (base, MSG, glans)
Currently: BPEL-8" NBPEL-7.25" Girth-6.25" (base)/6.125" (MSG)/6.125" (glans)