How To Get Bigger Muscles?
there are some reasons
Detailed Answer:
Hello,
getting bigger muscles requires hormones, food and exercise. Since you're female, the male hormones are low and can't contribute to it (and you wouldn't want them to contribute!). Adequate caloric and protein intake is required.
Regarding exercise: the type of exercises that increase the muscle diameter are the more intense ones. Execises that require more than 80-85% of your maximal strength may cause muscle hypertrophy. You should be able to complete 5-8 repetitions each time.
Intensity around 50% is good for the muscle tone. Less than that is considered aerobic exercise that may tone your muscles but won't make them bigger.
Also please check your body fat. Too much fat may alter your image. Aerobic exercise is good for reducing your fat. High intensity exercises are good for muscle hypertrophy.
I hope you find my comments helpful!
You can contact me again, if you'd like any clarification or further information.
Kind Regards!
muscle tone requires hypertrophy
Detailed Answer:
What you call "tone" requires your muscles to enlarge, that is to achieve some degree of hypertrophy. Hypertrophy requires high intensity exercises as I've described in my previous answer. Have you done that? This intensity won't allow you to do more than 5-8 repetitions each time. Your muscles should be unable to repeat the exercise when you finish each set of repetitions.
If you had and you eat enough protein and you can cope with this intensity then perhaps it's your genes. There is no other explanation.
Kind Regards!