1. Example of data obtained for a sequence of rowing stroke obtained
from one participant rowing on a Concept 2C during the 2 minute test (pace:
1.47min.sec·500m-1, 24 stroke·min-1). Top channel is the event trigger
marker obtained from peak detection of footswitch recording (2nd channel)
to indicate the start of the rowing cycle. The footswitch transients are
shown in the second channel, with upward deflections indicating start
of drive phase and downward deflections indicating beginning of recovery
phase. Successive upward deflections are used to determine duration of
rowing cycle. The 3rd channel shows the handle x-axis accelerometry record
used to measure the onset of the stroke in the cycle. The other channels
show sEMG activity as rms Amplitude from m. Rectus Femoris (RF), m. Erector
Spinae (ES), m. Biceps Femoris (BF), and m. Rectus Abdominis (RA) respectively.
X- axis scale is seconds. Y-axis scales show mV of sEMG for each muscle,
and accelerometry and footswitch in Volts.