Is it even possible (excluding the fact if someone does nothing but work out or work out for hours every day)?
In: Biology
Not a lot is going to happen from working out in 6 weeks. The biggest change will come from diet but it also depends on what “body transformation” entails.
If it means lose body fat, well let’s look at some numbers. There’s around 7700 calories in 1kg of body fat. Let’s say you target a fairly extreme calorie deficit of 1000 calories/day. 1000 * 7 * 6=42000 burned calories. 42000/7700= 5.45kg of total potential body fat lost (this ignoring some factors like how your metabolic rate changes as you lose weight/go into a high deficit but is good enough for a rough idea).
If it means gain muscle, it’s going to be much much less significant. Gaining muscle is significantly harder and happens much more slowly (think on the scale of years, not weeks).
But as others have pointed out, the biggest issue with “6 week” type of programs is it sets up the idea that this is temporary, people do these programs then stop doing anything and return to their previous lifestyle which quickly undoes anything you would have gained in those 6 weeks. If you want to look and feel different, you need to change your lifestyle, permanently. This means finding a sustainable source of exercise and change in diet that becomes part of your new lifestyle, forever.
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