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View Full Version : BMR Calculations - thoughts?



mattypoole
11-11-2011, 02:48 AM
hi all

*background*

I've been training on and off for years, and when I've been slack & put on body fat I've been very focused and lost it.

After a year off training and sensible diet with my partner and baby daughter (I know, no excuse but the reality of which consequences I now need to deal with) and a fair amount of body fat gains, I've been training quite hard and been doing a CKD.

Thing is, in the past I've done rough calculations based on low fat/high protein/moderate-highish carb based diets which have worked quite well, but I have managed to kill off some muscle in the process.

Hence the keto. It's worked well so far and I think I'm naturally pre disposed to insulin resistance.

In addition, it's meant to be very muscle sparing due to the metabolic shifts, and the #1 reason I've decided to give this a go.

12 weeks, ~ 10 kg and 4% body fat later the fat loss has started to slow, so I'm trying to be much more calculated about it now.

I know what my macro-nutrient ratios need to be so that's no problem.


Anyway, onto my question!

My lean body mass is about ~74 kg/162 lbs, and according to various BMR calculators for someone in their mid thirties, my BMR is approximately 1750 kcal.

I am very active (doing boot camp style training at the moment, combining a mixture of cardio, HIIT, resistance, boxing etc about 8 hours a week with 1 day off), so multiplying it by 1.3 to allow for my activity levels, giving me around 2275 on average.

Most of the BMR calculators seem to come up with something similar.

Does this seem like a reasonable figure (my lean body weight supplied is relatively accurate)?

For some reason, to me this figure seems a bit high.

If I can rely on the BMR as a reasonable estimate then great, I'm working with known quantities.


Just interested in what others think, any insights based on knowledge/ones own personal insight would be really appreciated.

Thanks! :)

Matt

yepimonfire
11-11-2011, 12:08 PM
dude i have the same LBM as you and my BMR is 1936

nlite2000
11-11-2011, 12:18 PM
At 6'0, 220 you will lose fat at a good clip eating 2300 calories a day.

mattypoole
11-11-2011, 02:12 PM
Wow, thanks for the replies guys!

Appreciate the insights, it's good to know I'm not overestimating my calorie needs.

I was sticking to circa 2000 calories a day (doing some zig zag etc), and trying to drop to 1800 was killing me - that'd explain why!

Will see how I keep going at around 2000 cals a day which has felt pretty good on my current activity levels and ratios, I definitely don't want to risk any muscle loss (managed to put on around 100-150 grams of lean mass in the last 6 weeks).

All the best,

Matt.

nlite2000
11-11-2011, 02:48 PM
Wow, thanks for the replies guys!

Appreciate the insights, it's good to know I'm not overestimating my calorie needs.

I was sticking to circa 2000 calories a day (doing some zig zag etc), and trying to drop to 1800 was killing me - that'd explain why!

Will see how I keep going at around 2000 cals a day which has felt pretty good on my current activity levels and ratios, I definitely don't want to risk any muscle loss (managed to put on around 100-150 grams of lean mass in the last 6 weeks).

All the best,

Matt.

You can cruise all the way down to lean on 2000 calories a day. Ignore stalls and plateaus, just be consistent and accurate with that intake and you'll get there.

mattypoole
11-11-2011, 02:53 PM
You can cruise all the way down to lean on 2000 calories a day. Ignore stalls and plateaus, just be consistent and accurate with that intake and you'll get there.

That sounds like sound advice, and to be honest I do think I started worrying too much about plateaus.

Thanks again mate :)