Weight Loss Running Simulator
How long do you need to run to lose weight? This simulator calculates the number of hours and running sessions needed based on your weight, your goal, and your running speed. Adjust the speed slider to see how your pace affects the number of sessions required.
⚠️ Important Information
This simulator is based on the theoretical principle that 1 kg of body fat = 7,700 kcal and that running burns approximately 1 kcal per kg of body weight per km covered.
- In reality, weight loss depends on many factors: diet, metabolism, hydration, muscle mass...
- A healthy weight loss is 0.5 to 1 kg per week maximum.
- Running too often without recovery can lead to injuries and exhaustion.
- Diet represents 70-80% of weight loss, exercise 20-30%.
Consult a health professional before starting a weight loss program.
Tips for Losing Weight Through Running
🏃 Gradual Progression
Start with 2-3 sessions per week and increase gradually. Don't exceed 10% more volume per week.
⏱️ Duration vs Intensity
To burn fat, favor long sessions (45min-1h) at moderate pace rather than short intense sessions.
🍎 Nutrition
A moderate caloric deficit (300-500 kcal/day) combined with running is more effective and sustainable than a drastic diet.
💪 Strength Training
Add 1-2 strength sessions per week to preserve muscle mass and increase metabolism.
😴 Recovery
Sleep (7-9h) and rest days are essential. It's during recovery that the body transforms.
📊 Tracking
Weigh yourself once a week, in the morning on an empty stomach. Daily variations are normal (water, digestion).
Frequently Asked Questions
How many hours of running to lose 1 kg?
To burn 1 kg of fat (7,700 kcal), a 75 kg person running at 10 km/h needs to run approximately 10 hours 15 minutes, which is about 10 one-hour sessions or 21 sessions of 30 minutes.
How many calories do you burn running for 1 hour?
Calorie expenditure depends on weight and speed. On average, a 75 kg person running at 10 km/h burns approximately 750 kcal per hour. The simplified formula is: calories ≈ weight (kg) × distance (km).
Is it better to run longer or faster to lose weight?
For fat burning, long sessions at moderate pace (45 min – 1 hr) are more effective than short intense sessions. Base endurance (60-70% HRmax) uses more fat reserves. However, intense sessions increase the afterburn effect (EPOC).
How many times per week should you run to lose weight?
For effective and sustainable weight loss, run 3 to 4 times per week with at least 1 rest day between sessions. Don't increase volume by more than 10% per week. Add 1-2 strength training sessions.
Can you lose weight just by running?
Running alone can help with weight loss, but diet accounts for 70-80% of results. A moderate caloric deficit of 300-500 kcal/day combined with running is the most effective and sustainable method. Without dietary control, the body often compensates calories burned by increasing appetite.