Which is the better muscle sensor for arduino?

Friends can you help me I need to buy a muscle sensor for arduino and I want to know which is the better option for take EMG signals and after plot this signals in matlab.
thank you for your responses

Atte,

Luis

Regards

Do you have in mind any possible devices and give here their datasheet links or you want someone to seek them for you?

Hard to say without knowing how you intend to use the sensor but our new MyoWare sensor was designed with Arduinos in mind. Unlike our previous sensor, it can be powered directly with the Arduino 5V or 3.3V pins.