Doing intense static stretches for a month makes your body more comfortable with being stretched further, mainly because your brain and nerves get used to the discomfort rather than your muscles actually changing. Light stretching doesn't trigger this response, so you won't see the same flexibility gains.

Doing static stretches, whether hard or easy, won't make your calf muscles stronger or more powerful over a month. Your strength and jumping ability stay exactly the same because stretching doesn't actually force your muscles to work hard enough to build strength.

Regular static stretching might make you stronger not just by building bigger muscles, but by teaching your nervous system to fire muscle fibers more efficiently. This means your brain and nerves get better at activating muscles, which can boost strength even without visible muscle growth.

Holding stretches for a few weeks in a row can actually make your muscles a little stronger and bigger, even if you don't do traditional weightlifting. This happens because keeping the muscle under tension for a long time signals it to adapt and grow.

Both static stretching and traditional weightlifting can build muscle and strength, but lifting weights gets you better results in less time. Because of this, weightlifting is generally recommended for most people, while stretching is better suited for those who can't handle heavy weights.

Doing static stretching for five weeks, twice a week for half an hour, can slightly but noticeably make your calf and ankle muscles stronger. This happens because stretching helps your nerves and muscles work together better, rather than actually making the muscle tissue itself bigger.