magnitud r 850. 8 n y direccion 100.7 grados magnitud r 850.8 n y direccion 101.7 grados magnitud r 852.8n y direccion 101.7 grados magnitud r 855.8 n y direccion 100.7 grados

In an experiment examining the effects tai chi on arthritis pain, callahan (2010) selected a large sample of individuals with doctor-diagnosed arthritis. half of the participants immediately began a tai chi course and the other half (the control group) waited 8 weeks before beginning. at the end of 8 weeks, the individuals who had experienced tai chi had less arthritis pain that those who had not participated in the course.