Mechanical properties of human tendon and their age dependence

摘要: There are no previously published data on changes in the mechanical behaviors of human tendon from maturation second decade to senectitude seventh or thereafter. In this study, 44 tendons individuals ranging age 16 88 yr were subjected an extensive series tests which included preconditioning, extensions at strain rates 100 percent/s, 1 and 0.01 stress relaxation with cyclic constant extensions. Pairs percent/s run throughout protocol evaluate repeatability tissue response. It was found that these responses changed little for any single sample within a pair such tests; however, protocol, peak stresses moduli decreased. Extensions different revealed definite rate dependency modulus being directly related extension slightly less hysteresis than percent/s. The load samples either generally best described by linear function logarithm time. varied magnitude. greater 10 Hz 0.1 Hz. results indicate subject has effect very small relaxation. Extensive information history not available study correlation so may have been masked other variables, possibly health, diet, disease, exercise.