Table 2 Dumbbell (DB) vs. Shake Weight (SW)comparisons for the CS, BS, and SW conditions (expressed as percentages of MVIC, % MVIC). Data are means (±SD). Chest Biceps Triceps SW DB SW DB SW DB Pectoralis Major 34.1 (27.0) 42.2 (36.5) 25.7 (22.4) 30.4 (20.1) 38.6 (46.1) 50.1 (68.4) Anterior Deltoid 31.4 (19.0) 36.6 (17.4) 33.2 (16.7) 31.9 (14.8) 45.4 (27.3) 49.1 (25.3) Rectus Abdominus 25.9 (31.2) 38.6 (15.8) 21.0 (16.8) 17.2 (11.9) 26.7 (31.3) 33.7 (33.7) Biceps Brachii 35.8 (30.8) 50.8 (28.9) * 47.7 (28.8) 50.9 (28.2) 29.4 (21.1) 38.0 (37.7) Triceps Brachii 46.0 (23.3) 46.1 (25.9) 50.9 (19.5) 52.3 (25.3) 50.0 (29.2) 52.0 (30.7) Trapezius 46.1 (21.1) 43.5 (18.4) 50.9 (41.5) 52.3 (45.9) 45.4 (37.5) 66.2 (37.1) * Indicates significant difference from SW (p < 0.05).