Introduction
muscle contraction
STS
The aim of this study was to compare the effects of sit-to-stand (STS) training programs with 5 Muscle power is a key factor for the health and well-being of individuals, as it not only allows them to carry out daily physical activities (Muscle power is defined as the product of muscle contraction force and velocity, and its development involves both morphological and neural factors (The muscle quality index (MQI), which is computed using the sit-to-stand test (STS) time and a formula that accounts for anthropometric variables, body mass, and gravity, has recently been utilized as a way to evaluate muscular power (It is widely acknowledged that incorporating exercise into daily life is essential for maintaining good health (An alternative training option for this situation is to use STS as a training method, where an improvement in performance, balance, and strength has been demonstrated after STS interventions (We hypothesized that STS training would increase muscle function and produce adaptations in the architecture of the vastus lateralis muscle (VL) in sedentary adults.