2. Action observation application to experimental group.
| Included trials | Time of AO of each motor action (min) | Time of exercise or imitation (min) of each motor action | Total AO (min) | Total exercise (min) | Total session (min) |
| Celnik 2008 | 10 | 10 | 30 | 30 | 30 |
| Cowles 2013 | 1 to 2 | 4 to 6 (2 to 4 rest) | 4 to 5 | 16 to 18 | 2 × 30‐min sessions (10 rest) |
| Dettmers 2014 | 5 + 4 after practice | Not reported | 9 | 20 | 60 |
| Ertelt 2007 | 6 | 6 | 36 | 36 | 90 |
| Franceschini 2012 | 3 | 2 | 9 | 6 | 2 × 15‐min sessions (60 rest) |
| Fu 2017 | 10 | 10 | 10 | 10 | 20 |
| Harmsen 2015 | 3 1 1 1 |
30 repetitions of reaching* 20 repetitions of reaching 20 repetitions of reaching |
6 | 60 repetitions* of reaching (time not informed) | Not reported |
| Hsieh 2020 | Phase 1: 2 to 3 Phase 2: 2 Phase 3: 2 + 2 (complete task) |
Phase 1: 2 to 4 minutes Phase 2: 3 minutes Phase 3: 3 minutes |
25 | 35 | 60 |
| Jin‐Woo 2011 | 5 | 10 | 10 | 20 | 30 |
| Kim 2015 | Not reported | Not reported | Not reported | Not reported | 30 |
| Kim 2016a | 9 (+1 to rest) | 30 | 9 | 30 | 40 |
| Kuk 2016 | 1 | 3 (10 rest) | 5 | 15 | 60 |
| Lee 2013 | 5 | 5 | 5 | 5 | 10 |
| Mancuso 2021 | 3 | 2 | 18 | 12 | 90 (60 of physical therapy and 30 of AO therapy) |
| Younghwa 2013 | 3 to 4 | 7 to 11 | 6 to 8 | 14 to 22 | 20 to 30 |
| Zhu 2015 | Not reported | Not reported | Not reported | Not reported | 30 |
Some of the trials did not provide all the values contained in the table, but based on those presented, it was possible to extrapolate the other values. AO: action observation
min: minutes *Not minutes