With a sampling frequency of 10 Hz, the highest frequency that can be uniquely represented is 5 Hz, which is much too low for any physiological recording (with the possible exception of respiration). The 50 Hz power frequency is aliased in it and cannot be removed. Resampling your signal is not going to imprive it.
Everything with a frequency above 5 Hz is already aliased in your signal, so that recording is essentially worthless, especially for EMG signals that have a significantly higher bandwidth (usually up to 100 Hz, requiring at least a 200 Hz sampling frequency).
You will need to start over with a much higher sampling frequency preferabley at least 250 Hz. Ideally, your instrumentation will have a Bessel lowpass filter on the input with a cutoff frequency equal to the Nyquist frequency (half the sampling frequency). Then you can record useful data.