Four things do almost all of the work in fat loss. Everything else you have read about is a rounding error, and most of it is sold to you precisely because the four are unglamorous.
The four that matter
1. An energy deficit you can sustain. Eating less than you use. Not a dramatic one; a modest deficit held for months beats an aggressive one held for three weeks and abandoned.
2. Enough protein. It preserves muscle while you lose weight, and it is the most filling of the three macronutrients. Most people trying to lose fat eat noticeably too little.
3. Strength training. It does not burn many calories. What it does is protect the muscle you would otherwise lose, which is the difference between finishing lighter and stronger versus lighter and weaker.
4. Steps. Daily walking is the largest and most controllable lever on total energy expenditure for most people, and it costs almost nothing in recovery.
If those four are in place, you will lose fat. If they are not, nothing else on this page will rescue it.
| Lever | Effort | Impact | |---|---|---| | Sustainable energy deficit | Moderate | The mechanism. Everything else supports it | | Enough protein | Low | Preserves muscle, reduces hunger | | Strength training 2-3x | Moderate | Decides whether you finish strong or just smaller | | Daily steps | Low | Largest controllable lever on expenditure | | Meal timing | Low | Negligible | | Supplements | Low | Negligible | | Fasted cardio | Moderate | Negligible |
Why the scales mislead you
Body weight moves daily for reasons that have nothing to do with fat: water retention, sodium, food volume still in your digestive system, hormonal cycles, glycogen stored alongside water, and how hard you trained yesterday.
Those swings are routinely larger than a week's actual fat loss. Which means a single weigh-in tells you almost nothing.
What to do instead: weigh at the same time, in the same conditions, and look at the trend across two to three weeks. Or weigh daily and average the week. Or use how clothes fit, which is annoyingly reliable.
Judging a week by one number is the fastest route to abandoning something that was working.
What barely matters
Not "does nothing", but small enough that worrying about it while the four above are unsorted is misdirected effort.
- Meal timing and eating windows. Fasting works for people it suits because it reduces intake, not because of the clock.
- Specific foods being "fat burning". None are.
- Supplements. Protein powder is convenient food. The rest is mostly marketing.
- Fasted cardio. No meaningful advantage for fat loss.
- Carbs after 6pm. Not a thing.
- Detoxes and cleanses. You have a liver.
- The precise split of your macros, once protein is adequate.
What actually goes wrong
Rarely knowledge. Almost always one of these:
Too aggressive a deficit. Very low intake produces hunger, poor sleep and low energy, which produces a collapse. Slower is genuinely faster because you finish.
No protein target. "Eating healthily" without attention to protein means muscle loss and constant hunger.
Stopping strength training to do more cardio. Backwards. Cardio helps; the strength work is what keeps the result worth having.
Judging by the week. Covered above and it ends more attempts than anything else.
All-or-nothing after a bad day. One heavy meal is irrelevant across a month. Abandoning the week because of it is not.
The practical part
- Set a protein target and hit it most days. Bodyweight in kilograms as a rough number of grams is a widely used starting point.
- Strength train two or three times a week. Non-negotiable if you want to like the result.
- Get your steps up. Whatever you currently do, add a couple of thousand.
- Create a modest deficit by adjusting portions rather than eliminating foods.
- Measure fortnightly, not daily, and expect the line to be jagged.
- Plan for bad weeks. They are not failure, they are the fifty-two-week reality.
Honest limitations
This is general guidance and not a diet plan. Medications, thyroid conditions, PCOS, menopause and a history of disordered eating all change the picture materially, and all of them warrant professional input rather than a blog.
If you have a history of disordered eating, tracking and deficits can be actively harmful. Speak to someone qualified before starting.
Rate of loss also varies enormously between individuals for reasons largely outside your control. Comparing your rate to someone else's is not information.
Next step
The fitness assessment quiz gives an honest read on where you are starting from.
Or get in touch for a free consultation with Ben.
Related: strength training for beginners and how often to train.
[ FAQ ]
Frequently asked
What actually causes fat loss?
Eating less energy than you use, sustained long enough to matter. Everything else, from meal timing to food choices to supplements, is a way of making that easier or harder to sustain, not a separate mechanism.
Why has my weight not changed this week?
Body weight moves daily with water, food volume, sodium, hormones and bowel contents, and those swings are often larger than a week of fat loss. Weigh weekly under the same conditions, or use a trend rather than a single reading.
Do I need to do cardio to lose fat?
No, though it helps. Walking is usually the higher-value option because it adds meaningful energy expenditure without the recovery cost that makes you eat more and move less afterwards.
Written by
The Suth Performance teamCoaches and editors
The Suth Performance programming team, led by HYROX Elite 15 athlete Ben Sutherland. They write the training, technique and race-day guides on this site, and Ben reviews every one before it is published.
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