Table 1. Differences in applied force and heart rate between intensities. High intensity Medium intensity Low intensity Applied force Shoulder abduction Mean 1.26 (0.55)* 0.83 (0.39)** 0.56 (0.31) Peak 4.66 (1.11)* 3.86 (0.98) 3.35 (1.51) Elbow flexion Mean 3.78 (1.11)* 2.66 (0.95)** 1.73 (0.80) Peak 9.91 (1.92)* 7.89 (1.77) 6.63 (2.83) Hip abduction Mean 2.86 (1.69)* 1.23 (0.77)** 0.33 (0.35) Peak 11.44 (3.38)* 7.16 (2.19)** 3.32 (2.08) Hip extension Mean 5.34 (2.17)* 2.77 (1.15)** 1.16 (0.52) Peak 17.54 (3.43)* 12.36 (2.39)** 8.00 (2.07) Heart rate Shoulder abduction 105.04 (15.96)* 100.04 (15.11)†  97.87 (14.19) Elbow flexion 105.71 (14.94)* 100.83 (15.19)** 96.08 (14.05) Hip abduction 107.17 (15.13)* 100.37 (13.96)** 97.42 (13.60) Hip extension 107.87 (16.93)* 101.08 (14.92)** 96.79 (14.35) Data are expressed as mean (standard deviation) of the different intensities (i.e., different grip widths). Applied force: kilograms for the peak and mean values obtained during the 15 repetitions at the different intensities; heart rate: beats per minute at just end of the 15 repetitions at the different intensities. * Very significant differences (p ≤ 0.001) with medium and low intensities. ** Very significant differences (p ≤ 0.001) with low intensities. †  Significant differences (p < 0.05) with low intensities.