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- Effect of Aging on the Lower Limb Kinematics in Karate Practitioners: Comparing Athletes and Their SenseisPublication . Branco, Marco A. C.; Brito, António Vences; Rodrigues-Ferreira, Mário André; Branco, Gonçalo A. C.; Polak, Ewa; Cynarski, Wojciech J.; Jacek, WąsikWith the life expectancy increasing, older adult population has gained the attention of many researchers. Aging is known to lead to a general decline in bodily functions, which affect the quality of life. The aim of this study was to analyze how the aging process affects veteran active karate practitioners, in the kinematic and temporal structure of the frontal kick. Nine black belt karate practitioners over 50 years old and 24 black belt karate practitioners, aged between 20 and 30 years old, all male, performed the frontal kick mae-geri. Results showed that knee is the structure that holds most differences between young and veterans, both for linear and for angular variables during the mae-geri performance. Statistical differences were found in linear velocity for the knee; linear acceleration of the knee, hip, and RASIS; maximum angular velocity for knee and hip; maximum angular acceleration for ankle and hip; and in the range of motion of knee. The temporal variables show differences, between groups, in maximum linear velocity, maximum linear acceleration, and maximum angular acceleration. However, no differences were found between groups for the time before contact in the maximum linear and angular acceleration, which allow us to remark both the effects of the aging process and the effect of training. This study corroborates the ability of older people to achieve benefits from sports practice, achieving higher efficiency than the younger adults in task execution, but using different motor control strategies.
- Athletes and their Sensei’s: did aging affect the lower limb kinematics in karate practitionersPublication . Branco, Marco A. C.; Brito, António Vences; Rodrigues-Ferreira, Mário André; Branco, Gonçalo A. C.Aging leads to a general decline in body functions that affects quality of life. Muscle function begins to slow the contraction from the 40 to 50 years and decreases muscle strength 1 to 1.5% per year after 60 years (Booth, Weeden, & Tseng, 1994; Vandervoort, 2002; Vandervoort & Mccomas, 1986). Older adults do less work for lower fast angular velocities (Power, et al., 2014), and less power for slow, moderate and fast angular velocities (Dalton, Power, Vandervoort, & Rice, 2012), than young adults. These losses increase as age increases. One factor that exacerbates these functional losses is the sedentary lifestyle, however, the physical exercise appears as an inversion factor, which cannot only reverse this decline but also promote an increase in functional capacity at the neuromuscular level. The athletic performance is seen as diminished in older adults, but in the case of martial arts, the karate Sensei’s are the technical execution model. This leads us to question if in karate young adults have better performance than older adults? Which in many cases are their Senseis’s. The aim of this study was to analyze the effects of the aging process in the kinematic and temporal structure of the frontal kick on veteran active karate practitioners.