Table 3: Scientific evidence table.
| Author | Year | Journal | Sample | Evidence level |
| Devereux, et al. [21] | 2018 | Journal of strength and conditioning research | 40 | I/0 |
| Bandy, et al. [20] | 2017 | International journal of sports physical therapy | 35 | I/4 |
| Ye, et al. [22] | 2015 | Pain Medicine | 100 | I/5 |
| Kim, et al. [16] | 2015 | Journal of the American Board of Family Medicine: JABFM | 12 | II - 2/0 |
| Moghtaderi, et al. [26] | 2013 | Advanced biomedical research | 40 | I/2 |
| Grieve, et al. [2] | 2013 | Manual Therapy | 10 | I/1 |
| Grieve, et al. [25] | 2012 | Journal of bodywork and movement therapies. | 22 | Ii-3/- |
| Henry, et al. [17] | 2012 | Pain research & management | 25 | II-2/0 |
| Grieve, et al. [24] | 2009 | Journal of bodywork and movement therapies. | 20 | I/1 |
| Ge, et al. [23] | 2009 | Acupuncture in medicine: journal of the British Medical Acupuncture Society | 13 | I/2 |
| Li, et al. [18] | 2009 | The Clinical journal of pain | 11 | II-3/ - |
| Ge, et al. [19] | 2008 | Experimental brain research | 14 | I/1 |