Figure 3. Average results for flexibility (a, b), balance (c, d) and lumbar strength (e) tests after a 12-week proprioceptive training program.> Inter-group differences within the same measurement, * p < 0.05, ** p < 0.001. Intra-group differences in pre- vs. post-intervention: †  p < 0.05, † † †  p < 0.001.