Table 2 Participant interaction with TERC
| Â | Â | Times the activity was performed per participant | |
|---|---|---|---|
| Â | n | Mean | Range |
Patient initiated communication | Â | Â | Â |
  Submitted comment or question to study staff | 33 | 1.7 | (0, 4) |
  Requested a reply from staff to submitted question | 20 | 1.3 | (0, 2) |
TERC initiated communication | Â | Â | Â |
  Exercises may be too easy | 34 | 1.4 | (0, 4) |
  Exercises may be too hard | 15 | 2.1 | (0, 6) |
  Pain warning sent to study personnel | 6 | 1.0 | (0, 1) |
  Stopped recording exercise | 41 | 2.6 | (0, 7) |
Patient usage of TERC features | Â | Â | Â |
  Viewed exercise routine | 52 | 16.7 | (2, 56) |
  Viewed exercise animations | 48 | 18.8 | (0, 123) |
  Viewed aerobic recommendations | 52 | 12.3 | (1, 52) |
  Printed exercise routine | 18 | 1.6 | (0, 3) |
  Requested less difficult exercise routine | 8 | 1.3 | (0, 2) |
  Requested more difficult exercise routine | 34 | 2.7 | (0, 7) |
  Denied request for more difficult exercise routine based on mSF-WOMAC | 4 | 1.8 | (0, 3) |