Before you start
To start losing weight, find your daily burn, set a gentle calorie target and add one easy habit a day for a week. You don't need a new wardrobe of rules. You need a starting number and a few wins.
Open the TDEE calculator. Subtract 300 to 500 calories, and that's your first target. A 35-year-old man at 5 ft 10 in and 220 lb burns about 2,670 calories on a lightly active day, so about 2,200 is a sensible start.
It also helps to write down why you're starting. More energy for your kids, easier stairs, better blood work: a clear reason makes the hard days easier. Keep it somewhere you'll see it every morning.
Your first 7 days
| Day | One new habit |
|---|---|
| Day 1 | Weigh in, set your calorie target, take a 10-minute walk |
| Day 2 | Add a protein source to breakfast (eggs, Greek yogurt, cottage cheese) |
| Day 3 | Swap one sugary drink for water or sparkling water |
| Day 4 | Fill half your dinner plate with vegetables |
| Day 5 | Walk after two meals today |
| Day 6 | Plan and shop for three easy lunches |
| Day 7 | Weigh in, note how you feel, and celebrate one win |
Keep every habit from earlier days going. By day 7 you're doing seven small things without much effort.
Build a simple diet plan
- Protein: about 1.2 to 1.6 g per kg a day. Find yours with the protein calculator.
- Plate: half vegetables or fruit, a quarter protein, a quarter whole grains or starchy foods.
- Snacks: protein plus fiber, like an apple with string cheese. See high-protein snacks.
- Water: a glass with each meal. The water calculator gives your target.
Want grams? Plug your calories into the macro calculator.
Your week-one shopping list
Stock a few easy, filling basics so the healthy choice is also the quick one.
- Protein: eggs, Greek yogurt, cottage cheese, a rotisserie chicken, canned tuna or salmon, tofu
- Produce: bagged salad, baby carrots, frozen vegetables, apples, berries, bananas
- Fiber-rich carbs: oats, whole-grain bread, microwave brown rice, canned beans
- Flavor: salsa, mustard, spices, a light dressing
- Drinks: sparkling water, tea, coffee
You don't need special diet foods or powders. Regular groceries work fine. For ideas for the first meal of the day, see high-protein breakfast ideas.
Make week one feel good
Expect some extra hunger in the first few days. Eat protein early, drink water and get to bed on time. A first-week drop of 2 to 5 lb is common and is partly water, so don't panic if week two is slower.
Track one thing you're proud of each day: a walk, a vegetable, a good night's sleep. Non-scale victories keep motivation up when the scale is moody.
Common first-week mistakes
- Changing everything on day 1. New diet, new gym, no sugar, no carbs. It's too much at once. One habit a day is plenty.
- Skipping breakfast and lunch, then feeling ravenous at night. Regular meals keep hunger steady.
- Weighing every morning and panicking. Daily swings of 2 to 4 lb are normal.
- Going too low. Stay above 1,200 (women) or 1,500 (men) calories a day unless a doctor is guiding you.
- Waiting for Monday. Any day is a fine day one.
Week two and beyond
Keep the habits, add a second walk or 2 strength sessions a week, and check progress weekly in the weigh-in tracker. If nothing has changed after 3 to 4 weeks, trim 100 to 200 calories or add movement. Read how to stick to a diet for the long haul.
Each Sunday, ask two questions. Which habit felt easiest this week? Keep it. Which felt hardest? Make it smaller, not bigger. Then add one new habit, like a second strength session or a vegetable at lunch. After a month, most of these run on autopilot, and that's when weight loss starts to feel normal instead of hard.
Check in with your doctor
A quick visit before you start is a good idea if you take medicines for diabetes or blood pressure, since your needs can change as you lose weight. The same goes if you're pregnant, have a heart, kidney or liver condition, or have struggled with disordered eating.
Your doctor can also check your BMI, look at your blood work and talk through every option with you. Asking for help early is a smart move, not a sign of weakness.
Run your numbers
Keep reading
Common questions
How do I start losing weight?
Find your daily calorie burn, aim for about 300 to 500 calories less, and add one small habit a day, like protein at breakfast or a walk after dinner.
How do I start a diet plan?
Set a calorie target, build plates around protein and vegetables, plan a few easy meals, and keep the plan simple enough to repeat.
What should I eat on the first day of a diet?
Regular meals with protein, vegetables and some whole grains. You don't need special foods; you need slightly smaller, more filling meals.
How much weight will I lose in the first week?
Often 2 to 5 lb, much of it water. After that, 0.5 to 2 lb a week is typical.