Wednesday, July 18, 2018
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legs sore and my hands numb in DYN

crtea1

New Member
Feb 10, 2018
2
0
1
36
MELBOURNE
#1
During DYN training, in my last 30 meters, my legs feel sore and tired and my hands feel numb.
Is this a signal of lacking O2 or the accumulation of CO2? I am not sure so that's why everytime I run into such situation I am worried that I might be out of O2 so I stop swimming.
And what does you usually do when you run into such feeling? You try you best to ensure the sore and tiredness in your legs and keep your current speed or you slow down your legs kicking a bit to make it more comfortable?

Thanks.
 

Nathan Vinski

Active Member
Apr 19, 2015
138
76
43
22
Canada
#2
Sore legs is lactic acid. This is actually a good thing, and it's a sign that your body is shunting blood away from the muscles and reducing their O2 consumption. Just maintain pace and push through it..

They numb hands could be 1 of 2 things. 1; We are taught that tingling numb hands is a sign of either hyperventilation (beginning) of the hold, or that you are coming close to your O2 limit. 2; it could also be the blood shunting from your arms as well, you just might have particularly strong bloodshift.

How long are you DYNs and how easy/difficult is the recovery. Everyone's gets different feeling throughout their dives so the easiest way to predict your limit is to monitor your recoveries and make calculated increases in performance. When recoveries start getting harder and harder you increase performance less and less until you arrive a few meters before your limit, avoiding actually having an LMC or BO.
 
Likes: crtea1
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crtea1

New Member
Feb 10, 2018
2
0
1
36
MELBOURNE
#3
Thanks, that explains a lot.
My STA is 5 minutes, I can do apnea walk for 130 meters with normal speed. My DYN is 70 meters, and I got legs sore and finger numb starting from 60 meters that is the reason I normally stop between 60 to 70 meters. If I stop at 60 meters, I need to take one or two breathe to recover and I don't have dizzy feeling or symbol of eye sight shifting.