- Skeletal muscle capillary density and fiber type are possible determinants of in vivo insulin resistance in man. Lillioja, S., Young, A.A., Culter, C.L., Ivy, J.L., Abbott, W.G., Zawadzki, J.K., Yki-Järvinen, H., Christin, L., Secomb, T.W., Bogardus, C. J. Clin. Invest. (1987)