Strength vs Hypertrophy
The two goals overlap more than the internet suggests: bigger muscles have more strength potential, and stronger muscles can be trained with heavier loads. The difference is mostly in rep range, rest, and what you are measuring.
Strength
Strength
Best for: Making a specific lift go up, measurably, week after week.
Hypertrophy
Size
Best for: Adding muscle, where how much you lift matters less than how much work you do.
Verdict
If you are new, train for strength first: it is measurable, it builds the technique everything else depends on, and beginners add muscle on it anyway. Once the main lifts stop moving every week, a hypertrophy block gives you more muscle to be strong with. Most good programs alternate between the two rather than choosing forever.
FAQ
Can I train for both at once?
To a degree — heavy work on the main lifts first, then higher-rep accessories. Powerbuilding programs are built on exactly that order.
Do I have to lift heavy to grow?
No. Muscle grows across a wide range of reps when sets are taken close enough to failure. Heavy is one way, not the only way.
How long should I stay on one?
Long enough to measure it — eight to twelve weeks. Switching every fortnight means never finding out whether either worked.