1 = Aerobic exercise
2 = Resistance exercise
3 = Yoga
4 = Qigong
5 = Relaxation/breathing
6 = Lifestyle behavior
7 = Tai Chi
8 = Neck strengthening

1 = Poor quality
2 = Generally poor
3 = Moderate quality
4 = Good quality
5 = Excellent quality

1 = Very poor
2 = Poor
3 = Avarage
4 = High
5 = Very high

Grados de Recomendación
1 = A
2 = B
3 = C
4 = D

1 = High Intensity Interval Training
2 = Moderate Intensity Aerobic Training
3 = High Intensity Interval Training / Moderate Intensity Training
4 = Low to Moderate Continuous Aerobic Training