A system comprising: a first monitoring device configured to couple to a first body part of a subject, wherein the first monitoring device is configured to measure a first cardiovascular signal and a first motion signal at the first body part; a second monitoring device configured to couple to a second body part of the subject, wherein the second monitoring device is configured to measure a second cardiovascular signal and a second motion signal at the second body part; and a controller configured to: receive the first and second cardiovascular signals and the first and second motion signals from the first and second monitoring devices; filter the first cardiovascular signal by removing one or more spectral components of the first cardiovascular signal that correspond to one or more spectral components of the first motion signal; filter the second cardiovascular signal by removing one or more spectral components of the second cardiovascular signal that correspond to one or more spectral components of the second motion signal; identify a correlated spectral component that is present in both the filtered first cardiovascular signal and the filtered second cardiovascular signal; and determine, based on the correlated spectral component, cardiovascular information of the subject. a first monitoring device configured to couple to a first body part of a subject, wherein the first monitoring device is configured to measure a first cardiovascular signal and a first motion signal at the first body part; a second monitoring device configured to couple to a second body part of the subject, wherein the second monitoring device is configured to measure a second cardiovascular signal and a second motion signal at the second body part; and a controller configured to: receive the first and second cardiovascular signals and the first and second motion signals from the first and second monitoring devices; filter the first cardiovascular signal by removing one or more spectral components of the first cardiovascular signal that correspond to one or more spectral components of the first motion signal; filter the second cardiovascular signal by removing one or more spectral components of the second cardiovascular signal that correspond to one or more spectral components of the second motion signal; identify a correlated spectral component that is present in both the filtered first cardiovascular signal and the filtered second cardiovascular signal; and determine, based on the correlated spectral component, cardiovascular information of the subject. receive the first and second cardiovascular signals and the first and second motion signals from the first and second monitoring devices; filter the first cardiovascular signal by removing one or more spectral components of the first cardiovascular signal that correspond to one or more spectral components of the first motion signal; filter the second cardiovascular signal by removing one or more spectral components of the second cardiovascular signal that correspond to one or more spectral components of the second motion signal; identify a correlated spectral component that is present in both the filtered first cardiovascular signal and the filtered second cardiovascular signal; and determine, based on the correlated spectral component, cardiovascular information of the subject.