The bird / dog requires asymmetrical trunk stability in both the sagittal and transverse planes of movement. (grinnelltraining.com)
By using the dozens of transverse plane movements offered with Steel Club training, your rotational power will increase dramatically. (onnit.com)
Although Pressel and Lengsfeld (1998), Arnold et al. (2000), and Arnold and Delp (2001) did not provide actual numbers for their studies, they all found that the adductors displayed very small transverse plane moment arms that are probably not meaningful. (strengthandconditioningresearch.com)