I recently started using a Garmin foot pod and heart rate strap with my Forerunner 935. The data seems more accurate now, but looks very different in Strava and Garmin connect. Instead of appearing a relatively straight line with numerous small spikes, the the lines for cadence and heart rate are now very boxy:
Cadence:
http://tinypic.com/r/2l93zwz/9
Heart rate:
http://tinypic.com/r/30bo4sk/9
Is there a reason for this? Is this just a more accurately reflection of the data? Thanks for the help.