AIM: The purposes of this study were to determine the age-related changes in the @entity924 and to investigate the effects of low-load resistance training on the @entity924 in middle-aged and elderly @entity1 . METHODS: Fifty-one @entity1 (55.8 +/- 13.7 years, range: 21-77 years) volunteered to take part in the present study. Furthermore, 11 middle-aged and elderly @entity1 (49.7 +/- 9.2 years) performed the low-load resistance training, i.e. squat using body weight, for 6 months. The elongation of the tendon and aponeurosis of the vastus lateralis muscle was directly measured by ultrasonography, while the subjects performed ramp isometric knee extension up to the voluntary maximum, followed by a ramp relaxation. The relationship between the estimated muscle force (Fm) and tendon elongation (L) during the ascending phase was fitted to a linear regression, the slope of which was defined as stiffness. The percentage of the area within the Fm-L loop to the area beneath the curve during the ascending phase was calculated as hysteresis. RESULTS: Maximal strain (L/initial tendon length) and stiffness of the @entity924 decreased significantly with ageing. In contrast, the hysteresis increased significantly with ageing. In addition, low-load resistance training produced no significant change in stiffness and hysteresis, but significantly increased the maximal elongation of @entity924 from 23.3 +/- 2.1 mm to 24.8 +/- 2.2 mm (P = 0.045). CONCLUSION: These results suggest that increasing age results in a decrease in the elasticity of @entity924 and an increase in their viscosity. Furthermore, the low-load resistance training made the elasticity of @entity924 increase.

Effect of low-load resistance training on the tendon properties in middle-aged and elderly XXXX .

@entity1 :: ('9606', 'Species') :: ['women'] @entity924 :: ('MESH:D052256', 'Disease') :: ['tendon-aponeurosis structures']
@entity1 :: (9606,Species) :: ['women']
