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decrease heart rate after strong effort under water

Discussion in 'Search and Rescue' started by curamax, Jun 26, 2019.

  1. curamax

    curamax Angel Fish

    # of Dives: 200 - 499
    Location: México
    36
    11
    8
    Hi,
    I'm doing my rescue diver certification,
    and the dive master told me about this: heart rate , after doing a very srong effort dont go down to normal , that in order to bring back to normal heart rate, you need to complete stop , in other words you have to stop moving .

    For example, in land, if you are running fast and your heart rate go high , you just slow down and your heart rate its going to come down . but in the water its not that way, you have to complete stop doing efforts .

    I want to know for 2 reasons ,
    1) underwater , its very common that your heart rate raise when you dive with dives with very strong currents , when you move from one spot to another with current , so for that matter I take 1 or 2 minutes the recovery my breath , so I dont consume my oxigen .

    2) the other reason , is in triathlon race, many times you start swimming very fast , so your heart rate goes high very fast , and doesnt go down even if you slow down the speed ( i did check in my training in a swiming pool ). and it happen that way
    and for that matter aprox 75% of people who died in triathlon races died in the swimming stage ( first one) maybe its for that reason?

    Can some one tell me if thats right ?

    ( I hope I explain my point the right way )

    thanks
     
  2. The Chairman

    The Chairman Chairman of the Board

    # of Dives: I just don't log dives
    Location: Cave Country!
    54,385
    21,240
    113
    Your heart rate is tied to CO2 levels. It's much, much harder to get rid of CO2 at depth. On the surface, it's harder to breathe due to water pressure on your chest. You're creating CO2 just trying to breath.
     
    curamax and MargaritaMike like this.
  3. caruso

    caruso Loggerhead Turtle

    # of Dives: 200 - 499
    Location: Long Island, NY
    1,532
    1,047
    113
    Never mind my mistake
     
  4. curamax

    curamax Angel Fish

    # of Dives: 200 - 499
    Location: México
    36
    11
    8


    Thanks

    Good to know that and why it happens
     
  5. jadairiii

    jadairiii Solo Diver

    338
    273
    63
    Hate to say this but it is not actually the case. You can "warm down" while swimming and bring your heart rate way down. Same way we would also warm down running, by running after a race. You will have to stop to get it to "resting rate" but that is obvious and that is with any type of exercise.

    What keeps your heart rate up is lack of conditioning. More out of shape you are, the longer it takes to get your heart rate down. If we do hard sprint sets in the pool we will always follow them up with a slow, easy 100 yard/meter swim to bring down the heart rate.

    Problem with Tri races, most people dont warm up prior to the race or when they start dont start easy and warm up during the race. Its not the swim that is killing them, its going balls to the wall without warming up. If the bike or run portion was first, that would kill the most. In every distance swim race I have done (5 and 10+K), I always take it out easy if I have not warmed up first. I will always catch the "rabbits" that go out fast and fade fast.

    And that is what often is happening underwater when people overexert. They are out of condition/shape, (and as stated above the increase WOB of scuba) so they build up a lot of CO2 and cant get their heart rate back down, not because of the CO2 but because of the lack of conditioning.
     

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