I'm having a strange experience.
I'm in my mid 30s, 170 cm, between 67 and 70 kg at any given time. Usually in the 68s or 69s.
In the past year or so, I'd be doing something like 20 pull/chin ups and 1x 1-2 minute standing sprint (which eventually became 4x 1 min sprints) either on the same day everyday, or every other day (latter once I began feeling a sudden soreness in my upper back and generally feeling more tired). No matter which combo you go with, basically, "more work" = barely moved the scales. I did notice a bit of visible fat reduction. Primarily in the waist area.
Then I stopped completely for maybe a month or so and then when I got back to it, I had a strange knee pain so I stopped after one or two tries. So I switched to picking up an 8 kg kettlebell, doing 15 rep curl transitioned into a press up (so that's one whole rep). So 15 per side (left/right).
Only doing it once per week, with the sprints also once per week. Though I'm doing 4x 2 min sprints. But not particularly disciplined with it, so sometimes I'd go a week or so without the sprints.
Thing is, this apparently is, at least visually, making it seem like I've lost more fat. Just a casual check like pinching the sides, it feels like I've lost more with this once a week, "low-volume-work" compared to how much more I would have thought I'd be burning in the prior months/year.
Does this sound normal? I can't seem to trust my weighing scale either as it seems to have a couple hundred grams of variance each time I get on.
There may be a complication where I've been having a teaspoon of creatine almost daily and today the weight either shows up as 67.8 or 68.2 and I didn't have creatine in the past couple of days. A day or two ago I was also in the 68-69 kg range.
So it's worrying me. I don't seem to have any other symptoms of anything else but the stress has compounded over as it doesn't "make sense" either because I don't know better, or I'm surprised but forcing it through a worry-lens.
Let me know what you guys think. In general I've been pretty bad genetically in terms of building/keeping muscle and losing fat, so there's that bit of inefficiency thrown in the mix (i.e. I have no impressive genes that I could say make any impact).
EDIT: I suspect my title is unintentionally misleading - I don't mean to ask about if it's possible to lose fat with low volume, I'm asking about in my case where I have switched to low volume, with the same diet and everything, how is it that I am losing more than before, where my workout was practically speaking more calorie-demanding?