6.8.2025 - Afternoon update
It’s day three of the cycle, so no gym today. Vacuum training and LISS as usual.
Had a prep strategy / “keeping stuff reasonable” - session with my business partner, we’ll be making slight adjustments:
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Moving HIIT to the morning after legs.
This is mostly logistical and enjoyment, as this way I can do it on the bike at home instead of row erg at the gym.
This is also the second best sport (first would be post legs as it was before) in terms of time between HIIT and the next leg session.
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Increasing calories on training days, possibly on rest days as well.
As I am considerably leaner now than when we set up the original plan and my expenditure has held up very nicely the calorie deficit compared to theoretical maximum for fat loss with minimal muscle loss has gone up. Thus to hold onto as much muscle as possible I need to up my calories.
For those interested in the theoretical max for fat loss there are a couple of ways to estimate that:
A) By bodyfat percentage:
- Take your bodyfat %
- Divide that by a valuen between 13-20, depending on how much risk of muscle loss you’re comfortable with. Higher value = less risk
- The number you end up with is the percentage of bodyweight you could lose per week
So if someone was, say 80kgs at 10% BF they could lose at most 10/13 = 0,77% bw/week (about 0,6kgs) or if they wanted to be More conservative they could aim for 10/20 = 0,5% bw/week (0,4kgs) (or less of course, but 0,4kgs would pretty certainly be enough to hold onto pretty much all of the muscle mass you ever could hold onto. Some will always be lost)
B) By total fat mass:
You can burn about 55kcal per kilo of bodyfat per day. So if you take your total bodyfat on kilos (80*0,1 = 8kgs in previous example) you can estimate a theoretical maximum for your daily and weekly fat burn.
Here it would be 855=440kcal per day and 7440 = 3080kcal per week. Bodyfat IS 7700kcal / kg sp that would amount to about 400g of fat loss per week.
Note that this is FAT loss, not total weight. As you lose fat you will lose some water weight too. By adding about 50% to the fat lost we can estimate the total weight loss per week, which in this case would be about 0,6kgs which is not surprisingly the same rate as the higher end rate of loss was in method A.
Now what will my deficit be?
Currently I’m holding onto about 6-7kgs of bodyfat. I’m going to calculate the deficit based on 6kgs as that will yield a lower number and thus a slower rate of loss (less chance of muscle loss). Using the higher number would make it more likely that I’m not underestimating my bf% but that is not relevant here; what is relevant is losing fat and holding onto the muscle.
Alright, so:
6*55kcal = 330kcal per day or 2310kcal per week which is 0,3kgs of bodyfat. That times 1,5 and I should expect to see about 450g of bodyweight drop per week on the scale.
I’m not trying to get absolutely peeled right now so I’ll go with that deficit for maybe a week or two and use it as a bridge to transition out of the deficit while losing some more bodyfat.
So yeah. More food. Yay.
[695 days out]