Influence of exercise intensity on training-induced tendon mechanical properties changes in older individuals.

Age (Dordrecht, Netherlands)

PubMedID: 24760611

Grosset JF, Breen L, Stewart CE, Burgess KE, Onambélé GL. Influence of exercise intensity on training-induced tendon mechanical properties changes in older individuals. Age (Dordr). 2014;.
This study compared the effects of low vs. high intensity training on tendon properties in an elderly population. Participants were pair-matched (gender, habitual physical activity, anthropometrics, and baseline knee extension strength) and then randomly assigned to low (LowR, i.e., ~40 % 1RM) or high (High R, i.e., ~80 % 1RM) intensity resistance training programmes for 12 weeks, 3× per week (LowR, n?=?9, age 74?±?5 years; HighR, n?=?8, age 68?±?6 years). Patellar tendon properties (stiffness [K], Young's modulus [YM], cross-sectional area [T CSA], and tendon length [T L]) were measured pre and post training using a combination of magnetic resonance imaging (MRI), B-mode ultrasonography, dynamometry, electromyography and ramped isometric knee extensions. With training K showed no significant change in the LowR group while it incremented by 57.7 % in the HighR group (p?