I design the AD8232 circuits following the datasheet (measuring heart rate by two hands). The band pass filter is 7-25Hz. When I stands statically it's OK to get a clean waveform, but there is a lot of noise when I am running, looks like the noise is from friction of hands and stainless steel electrode. Attached are the schematics except changing one 1Mohms resistor to 200Kohms (I believe it's a typo of the schematic because it determines the frequency of low-pass filer).
How can I filter the noise? Its amplitude can cover the R wave.