Weight gain

Neither "eating right" generically nor drinking water nor exercising will necessarily result in weight loss. I ate healthy foods, drank plenty of water, and had a heavy exercise schedule for a dozen years, yet stayed overweight to obese. If "eating right" includes eating the right number of calories for sensibly moderate weight loss, then weight loss will result.

Are you logging food and counting calories? If so, over what time period? At what calorie level for what height/weight and activity level? Do you eat back exercise calories, and if so about how many calories do you estimate for what duration of which specific exercises?

If the amount of time you've been working at this is less than 4-6 weeks, that's not necessarily long enough to know whether you're at the right calorie level or not, especially if the exercise is new. If it's a shorter time, the answer would be to hang in there, being reasonably consistent until you have those multi-weeks of data to estimate your actual average weekly weight loss.

If it's been at least that long, and you've been consistent with logging - no unlogged cheat days or oopsie days or similar - but lost literally zero weight, then Maggiegirl up there is right: You've probably found current maintenance calories. In that case, eating somewhat fewer calories or moving somewhat more - exercise of daily life stuff - would be the solution.

FWIW, in case it matters for context, I'm not some blithe 20-something starting on weight loss and repeating internet myths. I'm 69, female, severely hypothyroid (medicated for it), menopausal, with some osteoarthritis and some other physical stuff . . . and a woman who lost weight successfully using MFP at age 59-60, and who's been at a healthy weight for around 9 years since.

This process can work, but some aspects of it are a bit subtle, and there's a mild learning curve. Persistence, patience, and self-honesty are part of the process for succeeding, IME.

I'd love to see you succeed, because it's been a huge quality of life improvement for me, and I want that for everyone. I think you can do it, if you commit to it.

Best wishes!

Hello and welcome here. I hope you stick around.

Metabolism does slow down, but not as much as to make weightloss impossible. It's a little bit less. However, TO has not provided any information on their stats, thus we can't really say anything about this.

Also, cortisol increases water weight, masking weight loss. But it does not inhibit weightloss. We don't know how much exercise TO is doing. But yeah, exercising leads to water weight gain anyway to promote healing.

And finally personal trainers are hopefully trained in sports physiology, but nutrition is a completely different study personal trainers generally don't have any knowledge in. In the US you'd be looking at a registered dietician as everyone can call themselves nutritionist without any qualification.