On top of the regular physical therapy, the participants in the intervention group will receive a music and video-based group exercise therapy in small groups of 5. On a big screen, a video of an older woman performing exercises will be shown, the participants will have to copy these exercises. In the beginning of each session, the participants will be able to choose the music they want to move to.

The participants in the control group will receive no additional therapy.

Each exercise session will last up to 45min. The participants will follow this group exercise therapy twice a week for four months.

The OERS evaluates the positive (pleasure, interest/alertness) and negative mood (anger, anxiety, sadness) by observing the extent or duration of facial expressions and body movements and has a moderate to high interrater reliability. To evaluate the OERS, two exercise sessions will be recorded each month and results will be averaged to compensate for daily fluctuations.

The timed chair stand test is a valid and reliable test to evaluate muscle strength in older adults. The participant will be asked to stand up and sit back down on a chair five times without using their hands. The time it takes to perform this task will be measured.

When using the hand-held dynamometer to measure strength, the break technique will be used. The examiner will apply resistance in a fixed position and the person being tested exerts a maximum effort against the dynamometer for 3-5 seconds. At the last second, the examiner applies a resistance sufficient to overcome the maximum effort of the person being tested and cause the subject's joint to move.

Compliance will be measured by assessing whether the participants exercised at the prescribed intensity. To evaluate compliance, two exercises sessions will be recorded and results will be averaged to compensate for daily fluctuations. Both quality and quantity of the participants' performances will be scored. To measure the quantity, the amount of repetitions the participant performed will be rated from zero (no repetitions) to three (all repetitions). A score of two was chosen as cut-off score, indicating that more than half of the exercises were performed. To measure quality, the recorded performances will be compared with the visual instructions on the TV-screen and will be scored on a scale from zero (no repetitions) to three (the performance matched completely with the instructions). A score of two was chosen as cut-off score, indicating that more than half of the exercises were matched with the instructions.

The Tinetti test was developed to assess gait and balance in older adults and to assess perception of balance and stability during activities of daily living and fear of falling. It's also used as an indicator of the fall risk of an individual. During the test, the participant will be asked to perform certain tasks. The examiner will look at certain key points to score these tasks.