If exercising means you strain muscles to grow them, why does straining your back hurt it instead of making it stronger?

Question

If exercising means you strain muscles to grow them, why does straining your back hurt it instead of making it stronger?

In: 489

Answer 1

There is a fine line between tearing a muscle to make it bigger and tearing a muscle to shreds.

Micro tears build back bigger and stronger, while if you rip the muscle off the bone/tendon, you are going to have a bad time.