breathhold

I have measured:
- Time (minutes and seconds)
- Oxygen saturation in the blood
(circulation from the heart).

- Pulse (average during 15 sec period).
- Number of contractions.
- Rate of contractions (per minute).

Time	oxygen%	pulse	contraction rate	# of contractions
0.00	99	74	-	-
0.15	99	74	-	-
0.30	99	74	-	-
0.45	99	74	-	-
1.00	99	74	-	-
1.15	99	74	-	-
1.30	99	75	-	-
1.45	99	76	-	-
2.00	98	77	-	-
2.15	98	79	-	-
2.30	97	81	-	-
2.45	97	83	-	-
3.00	96	85	-	-
3.15	94	82	-	-
3.30	92	79	-	-
3.45	90	75	6	1
4.00	88	71	6	-
4.15	85	64	8	3
4.30	82	58	10	5
4.45	79	50	15	7
5.00	75	50	20	9
5.15	70	51	22	14
5.30	65	43	22	20
5.45	59	42	25	25
6.00	52	42	28	31
6.15	45	40	30	38
6.30	42	39	30	46

My goal was 6 minutes. I stoped when I (in the corner of my eye) saw the oxygene meter reading 40 something. Finished with focused eyes, four deep breaths and an OK sign. Never lifting head from the floor though.

QUESTIONS ARISES

(Check terminology here)
The contractions rate, we know, are influenced by the rising carbon dioxide. Thus they mainly tell me how much I ventilated before breathhold. We know that high carbon dioxide increases blood flow to the brain and thus increases the tolerance to low oxygen..
This means that less ventilation, theoreticly leads to higher tolerance of hypoxemia. But it will give you a less comfortable breathhold and the symptoms of carbon dioxide might make you terminate your breathhold before you suffer hypoxemia.

CONCLUSIONS

Question is; has the rate of contractions anything to do with low oxygen? Has low pulse anything to do with low oxygen? P. Lindholms (Karolinska Institutet 2002) thesis claims that "hypoxemia... provides an additional but not principal stimulus for bradycardi".
Thus low heart rate can be a sign of low oxygen.
My conclusion is; by studying your individual pulse you can get a hint of when to terminate a breathhold. It has also been proven that low oxygen enhances the effect of the contractions - this contains some logic - that the body more violently tries to make us breath when we are low on oxygen.
Thus more violent and maybe also more frequent contractions can be a sign of low oxygene.
So if you have the same breathingpatterns before every breathhold the rate of contractions and the strength of them can be used to "measure" your status.

RED - Oxygen BLACK - Pulse YELLOW - Contraction rate

PREPARATION

Some readers might be intrested in the preparations to this breathhold.

Only water, honey and banana during the 12 hours up to TOP. Vitamin pill and a drink containing aminos, sugar and minerals.
One hour yoga and relaxation right before.
Breathhold empty lungs - 1 min. 3 min rest.	Breathhold full lungs 4.15. 4 minutes rest.	Breathhold 4.35. 8 minutes rest.
(last two breatholds with one minute of contractions in each).

BREATHING PATTERN

the last 3.30 up to top.

time	type of breath	rate of breath	pulse
3.30	L - L	4/ min	74
3.00	L - L(half)	4/ min	74
2.30	L(Half) - M - M	5/ min	74
2.00	L - M - M - L	8/ min	78
1.30	S - M - S- S - S - S	12/ min	78
1.00	L - S - S	6/ min	72
0.30	M - M - L(90%) (through nose)- packed 8 gulps to 110% lung volume.	6/ min	72

This breathing was not planned. I just had an ambition to ventilate more than ususal to be able to experience low oxygen levels. At the same time I sought to keep my pulse down. I had some notions of hypocapnia.

Type of breath	lungvolume	breath lasts	description
L	90% - 35%	15 sec	Quick in slow out
M	80% - 25%	5 sec	more forcefull
S	65% - 40%	5 sec	very light (normal)

SUBJECT DATA

VC (5.9liters) (2002june) RV (1.9liters) (2000june) WEIGHT (70kg) LENGTH (1.87 meters) none-smoker Second test; seven sambas comments: sebastian @ webvideo.nu