[wes]

I have been wanting to do some dryland aerobic apnea training and don't have a rowing or stationary bike machine and aren't really that excited about apnea walking as I am tall so its along way to fall and I typically train in the middle of the night as my days are spent working and chasing our 2 year old Zan. So tonight I made up an excercise called "Apnea Knee Bends" and it goes like this:

Sit with your back agaist a wall with knees bent up agaist your chest. Then with a watch every second entend one leg then bring it back up then switch to the other leg. Timing goes like this:
0:00 Start with both legs up at chest
0:01 right leg fully extended (left leg kept up by chest)
0:02 right leg bent back to chest (left leg kept up by chest)
0:03 left leg fully exteneded (right leg kept up by chest)
0:04 left leg bent back to chest (right leg kept up by chest)
repeat so every 2 seconds both legs are bent up by chest.

I did this while breathing normally for 60 seconds then held my breath for a 60 seonds or longer while keep doing the knee bends as long as seemed reasonable. Regardless of how long I held my breath I would start another breath hold every 2 minutes and I did this for 20 minutes.

Results:
-I did all holds at least 60 seconds.
-Longest hold was 1:40 seconds (100 sec total) with 64% min show on SA02 finger meter (saturated Oxygen meter)
-Lowest SA02 was 62% with a 1:30 (90 sec) hold which was also the last hold.
-When I did the longer holds like 1:40 with only 20 seconds to recover it was harder to do another long hold "back to back" so I would do then only 1:10 or so. Not sure if it would be better to go to 3 min intervals and do longer breath holds with more recovery in between or not.

I am interested to see how other people find this excercise to do. It would be great to hear back from some beginners to try this and some intermidiates and a few +7:00 min static "experts" as well. If you don't mind to post your times and also if you think this excercise is beneficial training.
I am "advanced intermediate" with PB static 5:45 sec.

Cheers Wes