“…While one umbrella review (overview of systematic reviews) did not include the quality of trials in their assessment of the evidence (Huston & McFarlane, 2016), another umbrella review that did relayed the concerns of the review authors with regard to the methodological limitations of trials and the insufficient number of studies (Solloway et al, 2016). Indeed, systematic review authors have reported low-quality evidence for studies concerned with the benefits of Tai Chi for rheumatoid arthritis (very low) (Mudano, Tugwell, Wells, & Singh, 2019), chronic obstructive pulmonary disease (very low to moderate) (Ngai, Jones, & Tam, 2016), and considerable heterogeneity between studies concerned with the prevention of cardiovascular disease (Hartley, Flowers, Lee, Ernst, & Rees, 2014). Review authors have thus not been able to draw firm conclusions as to the health benefits of Tai Chi.…”