Right, so you're back from your holiday. You've had a brilliant time, eaten all the food, maybe had a few more drinks than usual, and now you're staring at yourself in the mirror thinking "right, time to sort this out."
I get it. Every January and February, I see the same pattern with clients. The motivation is there, the intentions are good, but the approach? That's where things go a bit sideways.
I'm Matt, and I work as an online coach and sports massage therapist. Over the years, I've helped hundreds of people navigate post-holiday weight loss, and honestly, most people make the same mistakes. The good news? They're all fixable.
So let's talk about the seven biggest mistakes I see people making after their holidays, and more importantly, how to actually fix them.
Mistake #1: Trying to Undo Two Weeks in Two Days
This is the big one. You've been away for a fortnight, enjoyed yourself properly, and now you think you need to reverse it all by Tuesday.
Here's what I tell my clients: you didn't gain all that weight in two weeks, and you're not losing it in two days either.
Most of what you're seeing on the scales right now is water retention, inflammation, and extra food sitting in your digestive system. It's not all fat. Give it a week of normal eating and you'll see half of it disappear on its own.
The fix? Resume your normal routine. Don't go mental with restrictions or mad workout sessions. Just get back to your regular habits. Cook your usual meals, move your body in ways you enjoy, and be patient with the process.
When you try to crash diet your way back to your pre-holiday weight, you trigger that horrible all-or-nothing mentality. You'll last maybe three days before you crack and end up face-first in a packet of biscuits. Trust me, I've seen it happen more times than I can count.
Mistake #2: Throwing Yourself Into Workouts Your Body Isn't Ready For
January gym memberships spike for a reason. Everyone comes back from holiday thinking "right, I'm going to smash the gym five times a week now."
Problem is, if you haven't been training consistently, your body isn't prepared for that level of intensity. This is where I see loads of issues around injury prevention come up in my sports massage practice.
You go from doing basically nothing for two weeks to suddenly attempting high-intensity interval training, heavy lifting, or running 5K every other day. Your muscles, tendons, and joints are like "mate, what are you doing to us?"
The fix from a personal trainer's perspective: Start with movement you actually enjoy, at an intensity that feels manageable. Go for walks. Do some gentle strength work. Maybe a swim if that's your thing.
Then gradually increase intensity over weeks, not days. Your body needs time to adapt. This isn't being lazy or making excuses – it's being smart about the long game. I'd rather see you training consistently three times a week than going hard for two weeks and then giving up because you've hurt yourself or burnt out.
Mistake #3: Following Some Ridiculous Restrictive Diet
Ah yes, the "I'm only eating chicken and broccoli" approach. Or the juice cleanse. Or cutting out all carbs, all sugar, all joy from your life basically.
Look, restrictive diets might give you quick results initially. You'll definitely lose weight in the first week. But then what? You can't sustain eating like that forever, so you go back to normal eating and boom – the weight comes back, often with a bit extra for good measure.
This is classic yo-yo dieting territory, and it absolutely wrecks your metabolism and your relationship with food.
What I recommend instead: Focus on balance, not restriction. Build your meals around lean proteins, loads of veg, some whole grains, and healthy fats. And yes, you can still have treats. In fact, you SHOULD still have treats.
When I work with clients through online personal training, we don't ban foods. We just make sure the majority of what you're eating is nutritious and supports your goals, while leaving room for the stuff you actually enjoy eating.
Mistake #4: Cutting Carbs Completely
This deserves its own section because it's SO common right now.
Carbs have gotten a terrible reputation, and I see people coming back from holiday thinking "right, no more carbs for me." They cut out bread, pasta, rice, potatoes – everything.
Here's the thing: when you eliminate carbs entirely, your body has to use protein and fibre to compensate for that lost energy. You end up feeling absolutely knackered, your workouts suffer, and you're miserable.
The sensible approach: Keep carbs in your diet, just be smart about it. Focus on whole grains, oats, sweet potatoes, and yes, even regular potatoes are fine. These foods provide energy, fibre, and important nutrients.
If you've got loads of leftover carb-heavy foods from your holiday, gradually reduce them rather than going cold turkey. Swap white pasta for wholegrain, or just have slightly smaller portions. Small changes add up without making you feel deprived.
Mistake #5: Setting Completely Unrealistic Goals
"I want to lose a stone in three weeks."
I hear variations of this all the time, and I get it – you want results fast. But here's what actually happens when you set impossible goals: you don't hit them, you feel rubbish about yourself, and you give up.
Better strategy: Make your first goal simply to maintain your current weight and prevent any further gain. Seriously. Just stabilize things first.
Then, aim for 0.5-1kg weight loss per week. That's sustainable, healthy, and actually achievable. It might not sound exciting, but in 12 weeks that's 6-12kg gone. That's significant.
As a personal trainer, I'd much rather see you lose weight steadily over six months and keep it off, than drop it all in six weeks and regain it by summer. The tortoise beats the hare every single time with weight loss.
Mistake #6: Beating Yourself Up With Guilt
The post-holiday guilt spiral is real. You feel bad about how much you ate, so you punish yourself with extreme diets and brutal workouts, which makes you miserable, which leads to giving up, which makes you feel guilty again.
It's exhausting just writing that out.
Listen, you went on holiday. You're SUPPOSED to enjoy yourself. That's literally the point of a holiday. Eating nice food and relaxing is not something you need to atone for.
The mindset shift: Control how you respond moving forward, not how you feel about the past. You can't change what you ate on holiday. What you can control is your next meal, your next workout, your next choice.
Self-compassion isn't about making excuses – it's about treating yourself like you'd treat a mate. You wouldn't tell your friend they're rubbish because they enjoyed their holiday, would you? So don't say it to yourself either.
Mistake #7: Skipping Meals to "Compensate"
This one's sneaky because it seems logical. "I overate on holiday, so now I'll under-eat to balance it out."
But here's what actually happens: you skip breakfast to "save calories," then by lunchtime you're absolutely starving, so you either overeat or make poor food choices because you're so hungry you'll eat anything. Then you feel guilty about that, skip dinner, and the whole cycle repeats.
What works better: Eat your regular, healthy meals at consistent times. If you've got social events coming up where there'll be food, don't arrive starving. Have a proper meal beforehand with protein and fibre, then enjoy reasonable portions of whatever's on offer.
When you eat regularly, your blood sugar stays stable, your hunger is manageable, and you make better decisions. Plus, you won't feel like you're constantly fighting against your own body.
The Bottom Line
Post-holiday weight loss doesn't need to be complicated or miserable. The mistakes I've outlined here all stem from the same root problem: trying to fix everything immediately with extreme measures.
What actually works? Getting back into your normal routine, being patient with your body, and making sustainable changes you can stick with long-term.
If you're struggling to figure out the right approach for you, that's exactly what we work through in online personal training. No mad diets, no punishment workouts, just practical strategies that fit your actual life.
Your holiday was meant to be enjoyed. Now let's get you back on track in a way that doesn't make you miserable, yeah?
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