The short version
- Lift weights two or three times a week and walk most days. That combination is the most predictable for blood sugar and the best for fat loss.
- Eat protein at every meal, keep carbs mostly around training and dinner, and keep the number of different meals small so your doses become predictable.
- Track four things for two weeks before changing anything: what you ate, when you trained, your glucose before and after, and how you slept.
- Your diabetes team sets your insulin. A coach sets the week around it.
One note before the detail. This is how I think about it as a coach who has type 1. It isn't medical advice. Your diabetes team stays in charge of your insulin, so agree any change to doses with them.
Start with the week, not the diet
When someone with type 1 asks me for a diet and exercise plan, the first thing I ask about isn't food. It's their week. What time they finish work, when they eat, how often they're out, and how much sleep they're actually getting. Blood sugar with type 1 is mostly a product of routine. A plan that changes every day gives you a different glucose graph every day, and you can't learn from that.
So the plan below is deliberately boring. Boring is what makes your numbers readable.
Training: weights first, walking most days
Two things do most of the work for fat loss with type 1.
Strength training, two or three times a week. Muscle pulls glucose out of your blood without needing as much insulin, and more muscle means more places for carbs to go. Over months, that's what makes your numbers easier to manage, not just your shape. Full-body sessions of 45 to 60 minutes, built around a squat or leg press, a press, a pull, and a hinge, are enough. Expect your glucose to rise during the session and come back down afterwards. That's normal, not a mistake.
Walking, most days. A steady walk is the most predictable exercise there is for type 1. It lowers blood sugar gently, it's easy to fit around meals, and it almost never produces a nasty surprise two hours later. Incline walking is my favourite version of it, and a ten-minute walk after your biggest meal is the single easiest habit in this whole article.
High-intensity intervals and long runs can both work, but both move blood sugar in two directions in one session. I'd add them once the basics are steady, not before.
Food: protein first, carbs where they do the most good
I don't use a special diet for type 1. I use the same rules I'd give anyone trying to lose fat, with two adjustments for insulin.
- Protein at every meal. Roughly a palm-sized portion or more. It keeps you full, it protects muscle while you lose fat, and it slows down how fast a meal hits your blood.
- Carbs mostly around training and at dinner. Carbs after a session go into muscle with less insulin. Carbs at dinner help most people sleep and stop the 9pm raid on the cupboard. Breakfast and lunch lean on protein, vegetables and some fat.
- Eat in this order: protein and vegetables first, carbs last. Same meal, flatter graph.
- A small number of meals you eat often. If you eat the same six or seven dinners on rotation, you learn exactly what each one does to your glucose and what it needs. Variety is the enemy of predictable dosing.
- Plan the treats. Nights out and takeaways aren't off limits. They're planned, so the dose is planned too. Here's how I handle eating out.
How much to eat is a separate question, and the answer for type 1 is a bit higher than a generic calculator gives you. I've written up the calorie formula I use here.
The two weeks before you change anything
Before you touch your food or your training, record two normal weeks. Four things, every day: what you ate and when, when you trained and what, your glucose before and after training and before bed, and how you slept. That's it.
At the end of two weeks you'll see patterns nobody else can see for you. The dinner that always runs high. The session that always drops you at 2am. The night of bad sleep that wrecks the next morning. Those patterns are the plan. Everything after that is adjusting one thing at a time and watching what happens.
A sample week
This is the shape I'd give someone who works full time and hasn't trained in a while. Adjust the days to your life, but keep the pattern.
- Monday: full-body strength, 45 minutes, after work. Carbs with dinner.
- Tuesday: 20 to 30 minute walk at lunch or after dinner.
- Wednesday: full-body strength, 45 minutes. Carbs with dinner.
- Thursday: walk.
- Friday: strength if you can, walk if you can't.
- Saturday: something you enjoy that moves you: a hike, a cycle, a long walk with someone.
- Sunday: rest, and cook two of your rotation dinners for the week.
Every day: protein at each meal, a walk after your biggest meal, and bed at a consistent time. If that looks too simple, good. Simple is what you'll still be doing in March.
What's different about doing this with type 1
Three things, and they're the reason a generic plan tends to fall apart for us.
First, the insulin you inject reaches your fat and muscle in a different way than insulin from a pancreas does, so being sloppy with carbs costs you more than it costs someone without type 1. Second, every low you treat is sugar you didn't plan to eat, so fewer lows is a fat loss strategy in itself. Third, your training changes how much insulin you need, which is why your diabetes team needs to know you've started, and why your plan has to be steady enough for them to adjust around.
If you'd like this set up around your own week and your own numbers, that's what I do with every client. Book a call below and we'll look at it together.