
Originally Posted by
CSAR
Hypoxics is fairly easy. There are different forms, but I'm intimately familiar with that of the swimming pool variety.
I don't know your swimming ability, but I'll assume you know how do a reasonable freestyle stroke. Some swimmers like to breathe in on the same side, while others (like myself) prefer to alternate sides. If you breathe in on the same side, then you will take a breath with even-numbered strokes. If you alternate the sides, then you will take a breath with odd-numbered strokes. Simply increase the number of strokes between breaths - that's hypoxics.
For example, because I alternate the sides I take a breath on, I would do the following:
100 m, 1 breath for every 3 strokes (I time my exhalations underwater to set a rhythm and allow me to take a full breath of air at the appropriate time)
100 m, 1 breath for every 5 strokes (same thing with the exhalations...just a little slower)
100 m, 1 breath for every 7 strokes
100 m, 1 breath for every 9 strokes
100 m, 1 breath for every 11 strokes and so on and so forth.
I work my way up until I can no longer increase the number of strokes between breaths. At that point, I'll increase my pace and decrease the number of strokes between breaths. I'll keep increasing my pace until I can no longer maintain the number of strokes between breaths and then drop down, continuing like this until I'm basically doing sprints at my original breath count.
Then I'll do sprint intervals, where I'll swim underwater for 25 m, come up & touch the side of the pool, then sprint back 25 m to my starting point. That's 1 set. I'll take 15 deep breaths and repeat as many times as I feel necessary without overtraining. As my aerobic capacity/efficiency increases, I'll take less deep breaths between sets.
I might also do the Davey Jones shuffle, where I hold some rubber coated weights in my hands and walk a certain number of steps along the bottom of the pool. When I can't take another step and get an inhalation reflex, then I'll surface, catch my breath and repeat. Again, as my aerobic capacity/efficiency increases, I'll take more steps and spend more time underwater between breaths.
These are just a few ways using swimming, there are a lot more.