How many sets and reps to do for your goal
Why a strength plan uses sets of 5 and a muscle plan sets of 8 to 12, and what really matters when choosing.
It's the most common question in the gym, and the short answer is that a wide range works. What changes with your goal is where in that range you should sit.
What actually builds muscle and strength
The main stimulus is the tension a muscle handles in sets that end close to its limit. A set of 6 and a set of 15 can build muscle in a similar way if both finish with one or two reps left in the tank. The difference lies in what else each one trains.
To get stronger: few, heavy reps
Strength is partly a skill: the body learns to move heavy loads by practising with heavy loads. That's why, on the big lifts (squat, bench press, deadlift, overhead press, row), a strength plan uses sets of about 5 reps. AppGym programmes 4 sets of 5 on those lifts when your main goal is strength.
To build muscle: moderate reps
Between 8 and 12 reps you accumulate a lot of useful work without each set being as demanding on your joints and nervous system as a very heavy one. It's the most comfortable range for adding volume week after week. For muscle, AppGym uses 4 sets of 8 to 10 on the big lifts and 3 sets of 10 to 12 on accessory exercises. The deadlift is the exception: 3 sets of 6 to 8, because with high reps your form breaks down before your muscles do.
To lose fat or for health
Strength training doesn't change when the goal is fat loss: its job is to keep your muscle while your diet does the rest. The work stays similar, with a little less volume per session (3 sets of 8 to 10 on the big lifts) and slightly higher reps on accessories, plus some cardio.
Accessories always go higher
On single-muscle exercises (lateral raises, curls, triceps extensions), heavy low-rep sets are hard on the joint and add little. There it's better to stay between 10 and 15 reps with good form.
How many sets per week
As a guide, most people progress well with around 10 weekly sets per muscle group, split over two sessions. Beginners need less; people with years of training, a bit more. Adding sets only makes sense if the ones you already do are done well.
In short
- Strength: big lifts at 4 × 5, with long rests.
- Muscle: big lifts at 4 × 8-10 and accessories at 3 × 10-12.
- Fat loss or health: 3 × 8-10 on big lifts, higher reps on accessories and some cardio.
- In every case: finish your sets with one or two reps in reserve and add weight once you complete them.