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Hiroshi R. Yamasaki, Hiroyuki Kambara, and Yasuharu Koike

The purpose of this study was to clarify criteria that can predict trajectories during the sit-to-stand movement. In particular, the minimum jerk and minimum torque-change models were examined. Three patterns of sit-to-stand movement from a chair, i.e., upright, natural, and leaning forward, were measured in five young participants using a 3-D motion analysis device (200 Hz). The trajectory of the center of mass and its smoothness were examined, and the optimal trajectories predicted by both models were evaluated. Trajectories of the center of mass predicted by the minimum torque-change model, rather than the minimum jerk model, resembled the measured movements in all rising movement patterns. The upright pattern required greater extension torque of the knee and ankle joints at the instant of seat-off. The leaning-forward pattern required greater extension hip torque and higher movement cost than the natural and upright patterns. These results indicate that the natural sit-to-stand movement might be a result of dynamic optimization.

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Mohammad Reza Pourahmadi, Ismail Ebrahimi Takamjani, Shapour Jaberzadeh, Javad Sarrafzadeh, Mohammad Ali Sanjari, Rasool Bagheri, and Morteza Taghipour

, Ribbers G , Stam H . Recovery of the sit-to-stand movement after stroke: a longitudinal cohort study . Neurorehabil Neural Repair . 2010 ; 24 ( 8 ): 763 – 769 . PubMed ID: 20702392 doi:10.1177/1545968310363584 10.1177/1545968310363584 20702392 9. Tung FL , Yang YR , Lee CC , Wang RY

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Stefan Schmid, Stéphane Armand, Zoltan Pataky, Alain Golay, and Lara Allet

An important prerequisite to carry out daily activities is the sit-to-stand movement. However, in obese people, this movement is characterized by altered biomechanics, which might lead to daily life activity impairments. The aim of this study was to investigate whether there are differences in kinetic and kinematic variables between three different BMI categories when performing a specific sit-to-stand test. Thirty-six adult women (BMI = 17–45 kg/m2) performed the sit-to stand test five times consecutively and as quickly as possible. Analyses of variance were used to determine differences between three BMI groups (normal or overweight: BMI < 30 kg/m2; obese: 30 ≤ BMI < 35; severely obese: BMI ≥ 35). Peak and mean vertical sacrum velocity indicated a decrease in severely obese subjects. Obese and severely obese individuals did not show higher fatigue over the five consecutive movements. Peak force and rate of force development decreased in normal or overweight subjects. The ability to successfully complete the test decreased with a higher BMI, probably due to a reduced ability to rapidly generate a high force.

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Dimitrios-Sokratis Komaris, Cheral Govind, Andrew Murphy, Alistair Ewen, and Philip Riches

participants and patients with osteoarthritis of the knee. The results obtained in this study are in agreement with the findings in the observation study of older adults and people living with dementia performing the sit-to-stand movement by Dolecka et al. 22 Leaning forward was the most common movement

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Cameron T. Gibbons, Polemnia G. Amazeen, and Aaron D. Likens

control in motor learning . Current Biology, 13 ( 2 ), 146 – 150 . PubMed ID: 12546789 doi:10.1016/S0960-9822(03)00007-1 10.1016/S0960-9822(03)00007-1 Fujimoto , M. , & Chou , L.S. ( 2012 ). Dynamic balance control during sit-to-stand movement: an examination with the center of mass acceleration

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Maria de Cássia Macedo, Matheus Almeida Souza, Geyson de Lima Batista, Michelle Almeida Barbosa, and Alexandre Carvalho Barbosa

, Totoribe K , Fukao Y , Deng G . Quantification of the sit-to-stand movement for monitoring age-related motor deterioration using the Nintendo Wii balance board . PLoS One . 2017 ; 12 ( 11 ): 1 – 12 . doi:10.1371/journal.pone.0188165 21. Eshoj H , Juul-Kristensen B , Jørgensen RGB

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Tomohiro Yasuda

– 119 . PubMed ID: 10380242 doi:10.1080/02701367.1999.10608028 10380242 10.1080/02701367.1999.10608028 16. Yamada T , Demura S . The relationship of force output characteristics during a sit-to-stand movement with lower limb muscle mass and knee joint extension in the elderly . Arch Gerontol

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Denys Batista Campos, Isabella Christina Ferreira, Matheus Almeida Souza, Macquiden Amorim Jr, Leonardo Intelangelo, Gabriela Silveira-Nunes, and Alexandre Carvalho Barbosa

, Kellis E , Amiridis IG . Neuromuscular efficiency during sit to stand movement in women with knee osteoarthritis . J Electromyogr Kinesiol . 2011 ; 21 ( 5 ): 689 – 694 . PubMed ID: 21689947 doi:10.1016/j.jelekin.2011.05.006 21689947 10.1016/j.jelekin.2011.05.006 11. Chaves SF , Marques NP

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Mohammadreza Pourahmadi, Hamid Hesarikia, Ali Ghanjal, and Alireza Shamsoddini

.7326/0003-4819-151-4-200908180-00135 19622511 12. Pourahmadi MR , Ebrahimi Takamjani I , Jaberzadeh S , et al . Kinematics of the spine during sit-to-stand movement using motion analysis systems: a systematic review of literature . J Sport Rehabil . 2019 ; 28 ( 1 ): 77 – 93 . doi:10.1123/jsr.2017-0147 10.1123/jsr.2017-0147 13. Hoy

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Nadège Tebbache and Alain Hamaoui

, E. ( 2015 ). Kinematics and knee muscle activation during sit-to-stand movement in women with knee osteoarthritis . Clinical Biomechanics, 30 ( 6 ), 599 – 607 . PubMed ID: 25846323 doi:10.1016/j.clinbiomech.2015.03.025 10.1016/j.clinbiomech.2015.03.025 Bouisset , S. , & Zattara , M. ( 1981