SDS: Self-Rating Depression Scale; CTARctar: chin tuck against resistance exercise; Shaker: Shaker exercise.*P=0.68 and † P=0.00 for pre-intervention vs. 6-week intervention in the same group; § P=0.03 and # P=0.00 compared to control group after 6-week intervention; $ P=0.00 compared to Shaker group after 6-week intervention.