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Table 2 Mean (±SD) pre- and post-training values for strength, balance, and muscle function in the StemSport and Placebo supplementation conditions

From: Effect of an herbal/botanical supplement on strength, balance, and muscle function following 12-weeks of resistance training: a placebo controlled study

Parameter StemSport Placebo
Pre Post Pre Post
Weight Adjusted Bench Press 1RM* 0.84 ± 0.25 0.95 ± 0.21 0.83 ± 0.28 1.00 ± 0.22
Weight Adjusted Leg Press 1RM* 1.95 ± 0.71 2.97 ± 0.64 2.10 ± 0.85 3.19 ± 0.94
Height Adjusted Vertical Jump* 0.28 ± 0.06 0.31 ± 0.06 0.27 ± 0.04 0.29 ± 0.04
Anterior SEBT 0.70 ± 0.11 0.70 ± 0.07 0.71 ± 0.07 0.68 ± 0.06
Posteromedial SEBT 0.91 ± 0.10 0.91 ± 0.60 0.92 ± 0.10 0.89 ± 0.09
Posterolateral SEBT 0.86 ± 0.11 0.86 ± 0.08 0.87 ± 0.11 0.85 ± 0.10
Eyes Open COM Excursion Velocity (cm/sec) 4.49 ± 1.36 4.50 ± 1.16 4.71 ± 2.02 4.05 ± 1.15
Eyes Open COM Excursion Area 6.24 ± 2.76 5.79 ± 2.82 6.24 ± 2.49 5.40 ± 2.09
Eyes Closed COM Excursion Velocity (cm/sec) 9.91 ± 2.90 10.30 ± 3.33 11.33 ± 3.94 9.65 ± 2.98
Eyes Closed COM Excursion Area 32.85 ± 13.6 33.87 ± 12.0 32.54 ± 11.1 28.28 ± 8.36
Elbow Extension Peak Torque @ 60°/sec (N · m)* 46.79 ± 14.2 51.64 ± 13.4 47.09 ± 14.4 60.04 ± 22.6
Elbow Extension Peak Torque @ 180°/sec (N · m) 30.65 ± 11.7 32.48 ± 9.7 30.65 ± 8.5 34.55 ± 10.5
Elbow Extension Average Power @ 60°/sec (W) 42.82 ± 15.0 46.58 ± 13.1 42.43 ± 13.2 54.68 ± 20.3
Elbow Extension Average Power @ 180°/sec (W) 60.11 ± 28.3 63.58 ± 25.1 54.80 ± 22.0 68.03 ± 25.0
Elbow Flexion Peak Torque @ 60°/sec (N · m) 47.94 ± 11.7 54.98 ± 14.4 48.26 ± 15.6 58.05 ± 20.1
Elbow Flexion Peak Torque @ 180°/sec (N · m) 32.99 ± 8.8 38.35 ± 11.6 32.90 ± 11.9 39.05 ± 13.08
Elbow Flexion Average Power @ 60°/sec (W)* 44.1 ± 11.0 51.05 ± 14.4 45.21 ± 16.1 56.40 ± 20.3
Elbow Flexion Average Power @ 180°/sec (W) 58.27 ± 19.7 68.42 ± 27.0 58.97 ± 31.0 70.09 ± 28.2
Knee Extension Peak Torque @ 60°/sec (N · m)Ω 122.5 ± 32.8 103.9 ± 25.6 124.99 ± 42.8 114.7 ± 44.6
Knee Extension Peak Torque @ 180°/sec (N · m) 83.7 ± 21.5 76.2 ± 15.9 85.24 ± 28.7 74.82 ± 29.5
Knee Extension Average Power @ 60°/sec (W)Ω 101.5 ± 27.6 88.9 ± 21.5 106.4 ± 37.3 94.8 ± 25.5
Knee Extension Average Power @ 180°/sec (W) 157.6 ± 46.9 146.0 ± 30.3 173.3 ± 76.7 139.7 ± 59.9
Knee Flexion Peak Torque @ 60°/sec (N · m) 64.4 ± 14.6 57.1 ± 12.9 71.0 ± 24.8 64.8 ± 24.9
Knee Flexion Peak Torque @ 180°/sec (N · m) 48.2 ± 14.2 45.4 ± 9.4 56.1 ± 21.6 46.9 ± 21.4
Knee Flexion Average Power @ 60°/sec (W) 56.4 ± 15.8 53.5 ± 14.6 66.5 ± 26.6 61.1 ± 24.8
Knee Flexion Average Power @ 180°/sec (W) 89.5 ± 36.7 84.2 ± 23.6 114.0 ± 54.1 92.5 ± 46.2
  1. 1-RM = 1 repetition maximum; SEBT = Star excursion balance test; COM = center of mass; kg = kilogram; cm = centimeter; sec = second; N.m = newton meter; W = watts. * = Significant improvement with training in both conditions, p < 0.05. † = Significant improvement with training in placebo condition only, p < 0.05. Ω = Significant decrement with training in StemSport condition only, p < 0.05.