Losing 12.5kg without exercise would leave you quite weak and likely in a “skinny fat” state. Aerobics is indeed not a good way to lose weight and yes you can’

Losing 12.5kg without exercise would leave you quite weak and likely in a “skinny fat” state. Aerobics is indeed not a good way to lose weight and yes you can’t outrun a bad diet but simply eating less isn’t a good solution because you end up with a low metabolic rate at the tail end of it and you’ll gain that rather quickly. Weight training with eating at or just above sustenance for your target weight (as long as it’s now below 10-15% of your current rate) is really the best way to go. You end up building muscle which maintains or even increases your metabolism and unless you starve yourself (or you had an extremely high muscle mass to being with) you’ll maintain and likely even increase your muscle mass even with an effective caloric deficit. You won’t come out as a body builder out of this regiment, but you’ll lose weight and or do a body transformation over a course of 3-6 months depending on how much weight you actually want to lose. That said it doesn’t work that well if you are obese and in terrible shape at that point diet + low intensity mobility exercise is needed until you can get into a shape that would allow you to do weight training without injuring yourself. I do agree that the time of your meals isn’t that critical yes it has an effect but most people aren’t in a spot when they need to min max everything, macros, fasting, and other shenanigans can make a difference and when stacked correctly a big one but they also require even bigger investment and self control. Find the minimal effort routine that would prevent you from turning into the humans from WAL-E and stick with it, it’s far easier to do something for 1-2 months longer if it’s less demanding than put in a lot of effort to try to get there a little bit faster. Beyond that just maintain a reasonable level of strength to defer the effects of aging. If you are a male and you can’t bench your body weight in your mid 30’s or do pull ups you are weak.