It is aimed to investigate the effects of telerehabilitation-based structured exercise on muscle strength, balance, performance, body image, prosthesis adaptation, activity limitation, prosthesis use satisfaction, and quality of life in individuals with unilateral below-knee amputation. Study hypothesis: In individuals with transtibial amputation, telerehabilitation-based structured exercise has an effect on muscle strength, balance, performance, body image, prosthesis adaptation, activity limitation, prosthesis use satisfaction, and quality of life. Forty individuals with a unilateral transtibial amputation will be included in the study. Participants will be divided into two groups as telerehabilitation and control groups with equal sample sizes by the randomization method. All participants will undergo a 6-week exercise program. A structured exercise program supported by telerehabilitation will be applied to the telerehabilitation group 3 days a week, and a home exercise program will be applied on the remaining days of the week. An only a home exercise program will be applied to the control group. Participants will be evaluated at the beginning and end of the study.

Amputation is a major trauma that significantly disrupts the biomechanics of the musculoskeletal system, results in serious physical and psychological loss, and completely affects the quality of life, social and professional life of the individual. Due to the increase in the elderly population and the incidence of diabetes and vascular diseases in the world, the number of individuals with amputation is increasing day by day. Approximately 150,000 lower extremity amputations are performed each year in the United States alone. The number of amputated individuals worldwide is expected to double by 2050. The most common amputation level in the world and in our country is transtibial amputations and approximately 39% of all amputations are performed at this level. In addition, the most common prosthesis use among individuals with lower extremity amputations is seen in those with the transtibial amputation level. Individuals who have undergone transtibial amputation have lost the foot-ankle complex and all related muscular functions. After transtibial amputation surgery, loss of proprioceptive information occurs in ankle control and in foot-ankle and all lower extremity muscles due to loss of exteroceptors around the foot. This leads to loss of balance during standing, stepping, and walking.

Physiotherapy and rehabilitation practices are needed in order for individuals with amputations to use their prostheses effectively and have a successful prosthesis adaptation. After the transtibial amputation, early period physiotherapy applications are followed by the use of prosthesis, and prosthetic period rehabilitation applications are continued. Prosthetic rehabilitation in individuals with transtibial amputation; aims to provide balance by taking into account the losses after amputation, to gain close to normal walking with minimum energy consumption, to ensure maximum independence in a safe manner by taking into account the pre-amputation lifestyles, expectations, and medical limitations of individuals. Physiotherapy and rehabilitation practices in individuals with transtibial amputation consist of a long-term process that starts before amputation and includes the early period after amputation, the prosthetic period, and returns to social life. Factors such as the long-term physiotherapy needs of individuals with transtibial amputation, the presence of gait and balance problems, geographical conditions, financial inadequacies, and epidemic diseases may cause problems for these individuals to reach the physiotherapy and rehabilitation applications offered in health institutions. In order to facilitate participation in physiotherapy and rehabilitation practices and to reduce resource use, telerehabilitation practices are recommended for individuals with amputation, as with other diseases that require rehabilitation. It is thought that telerehabilitation can be a useful and practical method for individuals with transtibial amputation where it is difficult and tiring to go to the clinic.

In the literature, it has been observed that there are very few studies examining the effects of physiotherapy and rehabilitation on parameters such as muscle strength, balance, gait, performance, body image, prosthesis fit, prosthesis use satisfaction, and quality of life in the rehabilitation of individuals with transtibial amputation. In addition, there are very few studies in the literature that include telerehabilitation applications related to transtibial amputations, and there is no study that questions the effects of structured exercise programs. This study was planned in order to determine the effects of telerehabilitation applications on muscle strength, kinesiophobia, balance, activity limitation, body image, prosthesis compliance and satisfaction with use, and quality of life in individuals with transtibial amputation. It is aimed to guide physiotherapists whether they prefer telerehabilitation applications as an evidence-based practice among rehabilitation methods in this field.

It is aimed to investigate the effects of telerehabilitation-based structured exercise on muscle strength, balance, performance, body image, prosthesis adaptation, activity limitation, prosthesis use satisfaction, and quality of life in individuals with unilateral transtibial amputation.

In order to determine the number of samples in the study; the alpha significance level of the hypothesis was 0.05; the effect size was determined as 0.5 and power as 0.85. As a result of the analysis; The research will be carried out with a total of 40 people, 20 people in each group.

Forty individuals with a unilateral transtibial amputation will be included in the study. Participants will be divided into two groups as telerehabilitation and control groups with equal sample sizes by the randomization method. All participants will undergo a 6-week exercise program. A structured exercise program supported by telerehabilitation will be applied to the telerehabilitation group 3 days a week, and a home exercise program will be applied on the remaining days of the week. An only a home exercise program will be applied to the control group. Participants will be evaluated at the beginning and end of the study.

Method of the Study:

• A mobile telecommunication group will be formed, including the participants and the physiotherapist. Communication with the participants will be provided here. In addition, one-on-one or collective teleconferences will be held with the participants when necessary.
• Before each session, the telerehabilitation group will be shown how to do the exercises online by the researcher, and it will be ensured that the patients do the exercises correctly and are followed up. In addition, at the beginning of each week, videos with the exercise content of that week will also be sent.
• The control group will be given exercise cards showing the home exercise program at the beginning of the treatment.
• Tracking of the exercises will be done with the exercise diary Statistical analysis: In the analysis of the data, statistical analysis including a descriptive, comparator, and correlation will be made. Mean, standard deviation and percentage distributions will be calculated for descriptive data. In the analysis of the repeated measurement results of the scales, ANOVA will be applied for the data conforming to the normal distribution. The student's t-test will be used for parametric data and Mann Whitney-U test for non-parametric data.

Inclusion Criteria:

• Having a unilateral transtibial amputation
• Using active vacuum system prosthesis and carbon foot for at least one year
• Being at the level of mobility level K2-K3
• Not having any problems in the healthy leg
• A score of 21 or higher on the Montreal cognitive assessment scale (MOCA)

Exclusion Criteria:

• Patients who received physical therapy in the last 6 months
• Having a neurological, orthopedic, and systemic condition that will prevent them from exercising
• Having any orthopedic and neurological problems in the upper extremity
• Having severe hearing, vision, and speech impairment

All IPD that underlie results will not be shared