Table 5 The number of Level 1, 2, 3 or 4 studies showing significant improvements for each outcome category (ordered from most to least frequently studied)
Outcome category | Total | Level 1 | Level 2 | Level 3 | Level 4 |
|---|---|---|---|---|---|
Muscle health | 30 out of 36 | 0 out of 1 | 3 out of 3 | 12 out of 16 | 15 out of 16 |
Power output | 34 out of 35 | 0 out of 0 | 0 out of 0 | 29 out of 30 | 5 out of 5 |
Aerobic fitness | 20 out of 26 | 0 out of 0 | 0 out of 0 | 17 out of 21 | 3 out of 5 |
Bone health | 11 out of 23 | 0 out of 0 | 1 out of 2 | 6 out of 12 | 4 out of 9 |
Cardiovascular and metabolic factors | 16 out of 21 | 0 out of 0 | 0 out of 0 | 12 out of 17 | 4 out of 4 |
Fat mass | 8 out of 16 | 0 out of 1 | 1 out of 2 | 1 out of 3 | 6 out of 10 |
Muscle strength | 12 out of 14 | 0 out of 0 | 0 out of 1 | 10 out of 11 | 2 out of 2 |
Other secondary health conditions | 7 out of 13 | 0 out of 1 | 1 out of 2 | 5 out of 7 | 1 out of 3 |
Subjective well-being | 7 out of 10 | 0 out of 1 | 0 out of 0 | 3 out of 4 | 4 out of 5 |
Functional and neurological outcomes | 3 out of 5 | 0 out of 0 | 0 out of 0 | 3 out of 5 | 0 out of 0 |