1RM - Personal Trainer Community - Forum

[blondiemama]

Hey, guys! Is there a lot of 1RM stuff on the exam? If so, could anyone help me out a little bit? I've just reread the chapter about designing a resistance training program and I'm still confused. For example, if a client's 1RM for a back squat is 250lbs, what would their 10RM be? How do I figure that out?

Thanks!!!!

Shannon

[Christina]

Hi Shannon and welcome. There is an RM chart in the book on page 373. Is this what you need? If the person's 1RM is 250 then their 10RM would be 188. Do you see it in the chart? This means that theoretically they could lift 188 pounds for 10 reps (or 250 pounds for 1 rep).

Update...
Something just dawned on me. Are you asking how did they arrive at 188 pounds in the chart? Turn to page 371. Do you see the "Percent of 1 RM-Repetition Relationship" chart? On the right side is the estimated number of repetitions that can be performed. Look down until you see 10. When you see the number 10 look to the left and you will see 75. Your original question was:

if a client's 1RM for a back squat is 250lbs, what would their 10RM be? How do I figure that out?

You figure it out by multiplying 250 (100% 1RM) by .75 (10 repetitions is 75% of 1RM) and you get 187.5 or 188 pounds. Does this make sense?

If you memorize table 15.3 you can answer any %RM question. You can have the chart memorized in 10 minutes or less.

Hope this helps.

Christina

[blondiemama]

That does help, thank you! For some reason I thought there was a way to figure it out without using the chart. I'm sure the chart will not be available for me to use during the exam, so I was wondering what the "manual" way of doing it was. I guess there isn't one!

Thanks, Christina!

[Trainer617]

Hey maybe this link will help as well. One Rep Max Calculator Sometimes when you see the numbers involved and the examples, it's a little easier to remember.