Research shows that ageing is modifiable or modulable, attending to external modifications and lifestyle factors: physical activity has a unique contribution to functional health and energy balance. Extensive research shows Tai Chi (TC) produced a major physical condition. To determine the impact of lifestyle on functional capacity, comparing the impact of continued long-life practice. Methods: 113 individuals (±71.53 years old): (a) PTC (n = 27); senior competitors, life-long training; (b) TC (n = 27); ±4 years; (c) Keep-Fit (KF n = 36); ±4 years; and the control group (d) sedentary individuals (SI n = 23). Five tests from the Senior Fitness Test (SFT) were used to assess the physical condition. The TC group showed significantly better results than the KF group: 30-s chair stand (23.22 ± 3.08* rep vs. 17.17 ± 2.96 rep), chair sit-and-reach (2.19 ± 4.85* cm vs. −1.93 ± 5.46 cm) and back scratch (1.02 ± 4.46* cm vs. −2.43 ± 5.78 cm). The TCP group showed better results than the TC group: 30-s chair stand (27.70 ± 4.98* rep vs. 23.22 ± 3.08 rep), 30-s arm curl (30.22 ± 4.36* rep vs. 23.48 ± 3.42 rep), chair sit-and-reach (13.07 ± 4.00* cm vs. 2.19 ± 4.85 cm) and back scratch (5.48 ± 3.51* cm vs. 1.02 ± 4.46 cm). Among the different activities analysed, TC showed better results in SFT tests; in particular considering the long-life training of this martial art.