Strength training for beginners: the least you can do that still works

Disclaimer: This article is general information, not medical advice. If you have a health condition, or you are new to exercise, mention your plans to your GP at your next appointment.

If you do one thing while losing weight beyond eating enough protein, make it this.

In studies of people losing weight by eating less, those who did no strength training lost a meaningful amount of lean tissue. Those who did strength training lost almost none. In one analysis of older adults with obesity, training prevented around 93% of the muscle loss that dieting alone caused. Evidence: strong, from meta-analyses of randomised trials

That is a large effect for a small time commitment, and it is the single best-evidenced thing in this guide.

How little you can get away with

The main barrier is the belief that training means five gym sessions a week and knowing what you are doing. The evidence says otherwise.

• The UK Chief Medical Officers recommend strengthening all the major muscle groups on at least two days a week, and are explicit that any amount is better than none. Strong
• Research on minimum effective training shows even one weekly session of a single hard set per exercise produces measurable strength gains. A few sets per muscle group per week captures most of the benefit available to a beginner. Strong for strength gains
• Moderate and even low-intensity training preserved lean tissue in dieting studies about as well as high-intensity training did. You do not need to train brutally hard, and doing so while eating less tends to backfire. Strong

A programme you can start this week

Two or three sessions a week, 20 to 30 minutes, at home. Bodyweight to begin with, then a pair of resistance bands or light dumbbells when it gets easy.

1. Sit-to-stand from a chair for legs. Progress to a goblet squat holding a weight.
2. Press-up against a wall or a kitchen worktop for chest and arms. Progress by using a lower surface, then the floor.
3. Bent-over row with a band or a dumbbell, for the back.
4. Overhead press for the shoulders.
5. Glute bridge for hips and lower back.

Do one set of 8 to 12 repetitions of each, stopping each set feeling you could have managed two or three more. Add a second set in week three, and a third by around week six. Make an exercise harder whenever 12 repetitions feels comfortable. Strong, guideline based

If you are over 65, add simple balance work such as standing on one leg while the kettle boils, which the NHS recommends alongside strength work. Strong

What to expect, honestly

Strength, not size. While you are eating less you can get considerably stronger and hold on to the muscle you have, but visible muscle growth mostly waits until your weight settles. Track progress by what you can lift and how many repetitions you manage, not by the mirror. Moderate to strong

A big deficit works against you. Evidence suggests that once the daily energy gap gets large, lean tissue starts to go regardless of training. Losing weight at a moderate pace protects muscle better than an aggressive approach does. Moderate to strong

Some days will be poor. Eating less means less fuel, and sessions will occasionally feel harder than they should. Shortening a session beats skipping it, and two short sessions a week done consistently beat four ambitious ones abandoned by March.

Creatine, the one supplement worth the money

Creatine monohydrate at 3 to 5 grams a day is cheap, among the most studied supplements there is, and modestly improves the muscle-preserving effect of training. Long-term use at that amount shows no evidence of harm to healthy kidneys. Strong for safety, moderate for benefit while losing weight

Two things to know. Expect the scales to rise 1 to 2 kg in the first few weeks from water held inside the muscle, which is not fat and not a failure. And ignore the loading-phase marketing: taking it steadily every day reaches the same place within a few weeks.

Check with your GP or pharmacist before starting creatine if: you have kidney disease or a single kidney, diabetes with kidney complications, you regularly take anti-inflammatory painkillers, or you are pregnant or breastfeeding.

The short version

Two or three short sessions a week, five basic movements, one set building to three, with enough protein alongside. In the research, that modest commitment is the difference between losing a stone of muscle and losing almost none of it.

Sources

• Xie and colleagues, network meta-analysis of resistance training during caloric restriction, Frontiers in Nutrition, 2025
• Sardeli and colleagues, resistance training and lean mass in older adults with obesity, Nutrients, 2018
• Lopez and colleagues, resistance training and body composition, Obesity Reviews, 2022
• Androulakis-Korakakis and colleagues, minimum effective training volume for strength, Sports Med, 2020
• UK Chief Medical Officers' Physical Activity Guidelines, 2019
• NHS, strength and balance exercise guidance for adults
• International Society of Sports Nutrition position stand on creatine, JISSN, 2017