Frequency of recovery criteria
| Recovery criteria | Number of studies | Studies |
| Somatic symptoms and cognitive performance | 11 | Refs. 43 45 46 58 64 67 84 86 96 99 103 |
| Somatic symptoms and physical exertion test | 4 | Refs. 42 52 56 102 |
| Somatic symptoms and cognitive exertion test | 1 | Ref. 98 |
| Somatic symptoms, cognitive performance and physical exertion test | 10 | Refs. 33 49 50 54 57 60 62 63 94 97 |
| Somatic symptoms, cognitive performance and balance | 5 | Refs. 41 48 66 95 104 |
| Somatic symptoms, cognitive performance and special physical exam | 2 | Refs. 38 93 |
| Somatic symptoms, cognitive performance, balance and physical exertion test | 4 | Refs. 36 51 55 92 |
| Somatic symptoms, cognitive performance, balance and special physical exam | 2 | Refs. 61 100 |
| Somatic symptoms, cognitive performance, balance and return to learn | 1 | Ref. 68 |
| Somatic symptoms, cognitive performance, physical exertion test and cerebral blood flow | 1 | Ref. 83 |
| Somatic symptoms, cognitive performance, physical exertion test, special physical exam and return to learn | 1 | Ref. 91 |
| Somatic symptoms, balance and physical exertion test | 1 | Ref. 101 |