Balance will be assessed with the Berg Balance Scale (BBS), a 14-item physical performance measure of static and dynamic balance found to be reliable. Scoring ranges from 0-56, with higher scores indicating better balance. A score of <46 identifies an individual at risk for falls after stroke.

Timed "Up & Go" will be used to measure functional capacity. It is a simple test used to assess a person's mobility and requires both static and dynamic balance. Less time to complete the test in seconds implies better outcome.

Sit-to-stand test (3 repetitions) will be used to measure functional capacity. Less time to complete the test in seconds implies better outcome.

Evaluation of functional capacity during walking by using 2 minutes walk test. More distance covered in 2 minutes implies better outcome.

The Haemophilia Activities List questionnaire measures the impact of hemophilia on self-perceived functional abilities in adults.

It contains 42 multiple choice questions in seven domains:

Lying/sitting/kneeling/standing (8 items) Functions of the legs (9 items) Functions of the arms (4 items) Use of transportation (3 items) Self-care (5 items) Household tasks (6 items) Leisure activities and sports (7 items) The most important outcomes are the overall sum score and three component scores relating to upper extremity activities, basic lower extremity activities, and complex lower extremity activities. The score is obtained using a Likert scale with 5 options: always=2, mostly=3, sometimes=4, rarely=5 and never=6 (complemented by the option "impossible=1" for those people who can not perform such activity). Subscales are summed, with a total score from 0- 252 and higher values represent a worse outcome (greater self-perceived difficulty in carrying out the activities).

Observed activity limitations will be measured with the Functional Independence Scale for Hemophilia (FISH) as part of the Activity Domain.

The scale studies 8 activities (eating and grooming, bathing, dressing, chair, squatting, walking, stairs and running), which are classified into the three groups (Self care, Transfers and Locomotion) and their score ranges from 1 - 4 (1 being the highest dependency and 4 being the greatest independence to perform the exercises). Subscales are summed, with a total score from 8-32 and higher values represent a better outcome.

The FISH has been validated for use in developing countries. It consists of observed activities of daily living that are scored for quality.

Measured by a Specific questionnaire for Quality of Life related with health evaluation for adults with haemophilia (A36Haemophilia-QoL), which explores 9 areas. Subscales and score range: Physical health: 0-32; Daily activities: 0-16; Joints: 0-12; Pain: 0-8; Treatment satisfaction: 0-8; Difficulties treatment: 0-16; Emotional functioning: 0-20; Mental health: 0-12; Social activity: 0-20. Subscales are summed, with a total score from 0-144 and higher values represent a better outcome (more Quality of Life perceived).

Kinesiophobia will be evaluated by Tampa Scale for Kinesiophobia (TSK-11SV) (Spanish adaptation. Gómez-Pérez, López-Martínez y Ruiz P., 2011). Scoring: Items are summed, with a total score from 11-44 and higher values represent a worse outcome (more pain interference in behavior).

MFES is a 14-item questionnaire related to daily indoor and outdoor physical activities. It is a 10-point visual analog scale of confidence level in completing a particular activity (item) without falling, rated from 0 to 10, where 0 denotes not confident or sure at all, and 10 denotes completely confident or sure. The total score for the 14 items ranges from 0 to 140.

Joint clinical evaluation of elbows, knees and ankles by using The Hemophilia Joint Health Score 2.1 (HJHS). The full score range goes from 0 to 124 points (0-20 points for each of the six joints evaluated, plus 4 points for the overall assessment of gait. 0 means no joint damage, whereas the higher the value, the higher the degree of arthropathy.