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Old 08-05-2009, 07:19 AM   #1
Luke Hale
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Working out 'as Rx'd' with metric plates

I've searched and searched but not found any answer to my question.

At my gym here in the UK, all the weights are in Kilos ...though some plates will say 20kg AND 45lbs ...though 20kg is actually more like 44lbs

All the WODs are of course in pounds!

I'm going to do Fight Gone Bad today, which calls for 75 pound SDHP and Push-Presses.

I assume you guys in the US just add two 15 pound plates to the bar for this.

This is where I get stuck:

Do I get a 20kg bar and add two 7.5kg plates? (35kg = 77lbs)

or do I add two 5kg plates and two 1.25kg plates (32.5kg = 72lbs)

How do others in the UK work it? Eg for Fran do you use 43kg? or just 40kg for simplicity?

Also I guess I'm asking how accurate your weights in the US are?

Are your 45 pound plates REALLY 45 pounds? ...or 20Kg?



I know it only really makes a small difference, but when trying to workout as rx'd for reps (ie FGB), surely the odd pound or two would have an effect?

Again, sorry if this has been answered before but I couldn't find it.

Last edited by Luke Hale : 08-05-2009 at 07:21 AM.
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Old 08-05-2009, 07:40 AM   #2
Eddie Watts
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Re: Working out 'as Rx'd' with metric plates

20KG=45LBS

1kg=2.25lbs

learning conversion in your head is a handy byproduct of CF in the UK
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Old 08-05-2009, 07:48 AM   #3
Matth Challoner
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Re: Working out 'as Rx'd' with metric plates

just convert it.

for example fran 95 pound thrusters equals 43.kg thrusters

p.s. you probably have a converter on your phone
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Old 08-05-2009, 07:51 AM   #4
Clay Jones
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Re: Working out 'as Rx'd' with metric plates

I'm in the US and have used kilo plates for years. After a while you get used to doing the conversion in your head.
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Old 08-05-2009, 08:02 AM   #5
Luke Hale
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Re: Working out 'as Rx'd' with metric plates

I can do the conversions.

But like I said, 20 kg is 44lbs, not 45lbs

So for 75lbs SDHPs I'd need 34kg

and for Fran, 43kg


...my gym doesn't have 1kg, 1.5kg or 2kg weights ...do many?

From what I've seen, 1.25kg are common, as are 2.5kg

So how do you do it Rx'd??
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Old 08-05-2009, 08:09 AM   #6
Mac Oneill
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Re: Working out 'as Rx'd' with metric plates

I think if you're within 1 pound of the RX I wouldn't worry about it, but if your going to be off by a couple pounds I would either do the weight that is closer to the RX weight, or just go a little heavier every time. Personally I think you should just go heavier, but in the end it's really your call.

Last edited by Mac Oneill : 08-05-2009 at 08:11 AM.
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Old 08-05-2009, 08:27 AM   #7
Lee Hill
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Re: Working out 'as Rx'd' with metric plates

Mac is on the money. At crossfit northeast england we do a 42.5kg fran, a 62.5kg grace and don't worry too much about it. to the nearest 2.5kg is the general unspoken rule, whether that be slightly lighter or heavier. No raids from the crossfit RXD police so far.

If you're rocking a WOD with good form at 1lb or 2 either side, you would theoretically be able to do it at the exact poundage. Hope this allays some of your worry.
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Old 08-05-2009, 08:37 AM   #8
Luke Hale
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Re: Working out 'as Rx'd' with metric plates

Quote:
Originally Posted by Lee Hill View Post
Mac is on the money. At crossfit northeast england we do a 42.5kg fran, a 62.5kg grace and don't worry too much about it. to the nearest 2.5kg is the general unspoken rule, whether that be slightly lighter or heavier. No raids from the crossfit RXD police so far.

If you're rocking a WOD with good form at 1lb or 2 either side, you would theoretically be able to do it at the exact poundage. Hope this allays some of your worry.
Perfect answer! I shall do everything to the nearest 2.5kg

Cheers mate!
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Old 08-05-2009, 09:45 AM   #9
Matt Haxmeier
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Re: Working out 'as Rx'd' with metric plates

Even for us using pounds I've found that weights don't always weigh what they say they weigh. Of course it's difficult to find a scale accurate enough and that you trust enough to tell you either way.

I have a set of 35lbs plates that one is around 33 and the other around 36.

So odds are some of us aren't using the exact weight either.
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Old 08-05-2009, 04:27 PM   #10
Veronica Carpenter
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Re: Working out 'as Rx'd' with metric plates

lift what you can lift, when it's too light lift heavier. It's not rocket science.
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