HGF and chronic obstructive pulmonary disease: Within the COPD group, no correlation was found between the total time to perform five STSTS movements and the QF (% predicted) (r = −0.09, p = 0.770), or between the total STSTS time and the HGF (% predicted) (r = 0.268, p = 0.335), or between the total STSTS time and the inspiratory muscle strength (PImax (% predicted)) (r = −0.06, p = 0.804).