Intervention Group in Valdoltra Orthopaedic Hospital. Patients will get current standard physiotherapy during hospitalisation and extra one-on-one training to learn strength and sensory-motor exercises. At discharge they will get USB drives with exercise videos, written exercise instructions, training diary and exercise aids for strength and sensory-motor training.

Control Group in Valdoltra Orthopaedic Hospital. Patients will get current standard physiotherapy during hospitalisation and USB drives with exercise videos, written exercise instructions and training diary at discharge.

Intervention Group in General Hospital Novo mesto. Patients will get current standard physiotherapy during hospitalisation and extra one-on-one training to learn strength and sensory-motor exercises. At discharge they will get USB drives with exercise videos, written exercise instructions, training diary and exercise aids for strength and sensory-motor training.

Control Group in General Hospital Novo mesto. Patients will get current standard physiotherapy during hospitalisation and USB drives with exercise videos, written exercise instructions and training diary at discharge.

Early postoperative strength and sensory-motor training after total hip arthroplasty. Training consists of: hip muscles strengthening (focusing on abductors); hip and pelvic stabilization exercises; ankle and knee muscles strengthening (better dissipation of impact forces and femoral inner rotation control); trunk muscles strengthening (stabilization of pelvis and lumbar spine and reduction of local loading).

Maximal voluntary isometric contractions. We will use specially prepared measuring device with dynamometer attached to stiff bands metal chains. For the assessment of maximal isometric strength, a maximal voluntary isometric contraction for 6 seconds is asked. The same procedure to obtain a maximal voluntary contraction is used for every strength measure. 3 movement planes are assessed for trunk (extension, left and right abduction) and operated hip (flexion, extension and abduction) and 2 for opposite hip (extension, abduction).

8-Feet Up and Go Test. The 8UG is a timed test that requires one to stand up from a chair with armrests, walk to a cone 8 feet away, turn around, return to the chair and sit down.

Timed 10-meter walk test. Individual walks without assistance 10 meters and the time is measured for the intermediate 6 meters to allow for acceleration and deceleration. The test is first performed at preferred walking speed and second at fastest speed possible.

Harris Hip Score. The HHS is a widely used disease-specific measure of hip disabilities after THA. The physiotherapist administers the test in the form of a structured interview with the patients. The domains include pain, functions of daily living and gait. The rating scale is from 0 (worse) to 100 points (best). The HHS is considered to have good validity and reliability.

Training dairy. All participants in both groups will keep a training dairy concerning all training activities - they will make marks by every exercise they will perform on exact day, write notes if they will have any other sport activities (walking, stationary bicycling and other) and if there will be any adverse effects, reasons why they skipped training if they did. They will also measure pain on Visual Analog Scale (VAS) during day before and after training and during night.