Preparation for Sports Retirement: Study Protocol

Quality of life. The range of scores is from 26 to 100 points. The higher the score, the better the quality of life.

Attitudes towards retirement. The range of scores is from 20 to 140 points. The final scores indicate more negative attitudes the higher the value obtained

Satisfaction with life. The range of scores is from 5 to 25 points. A higher score indicates that the person is generally satisfied with his/her life.

Stereotypes about ageing. The range of score is from 5 to 20 points. High scores indicate a high degree of belief in negative stereotypes of ageing.

Psychological inflexibility. The range of score is from 7 to 49 points. High scores indicate more psychological inflexibility.

Perceived social support. The overall scores range from 20 to 100 points. The higher the score, the more social support the individual perceives.

Perceived general health. The overall scores range from 0 to 36 points. Higher scores correspond to a higher level of perceived health.

Self-efficacy. Scores range from 10 to 40 points. Higher scores indicate higher levels of self-efficacy.

Self-regulation. Scores range from 7 to 35 points. Higher scores on the scale indicate a greater ability to control attention in the pursuit of goals, while lower scores may suggest difficulties in maintaining focus and attention to goals.

This measure will allow assessing the degree of planning, retirement expectations, and knowledge of available resources-all predictive factors of a more satisfactory emotional and functional adjustment (Alfermann et al., 2004). This test consists of 35 items divided into three variables: reasons for retirement (11 items), difficulties encountered during retirement (11 items), and coping strategies (13 items). The questionnaire was translated into Spanish and adapted for active athletes. It shows a Cronbach's alpha of 0.87 for the ARQ retired athletes version and 0.84 for the ARQ active athletes version. The questionnaire consists of 37 and 31 items in each of its versions respectively, with closed-ended responses.

It consists of 10 items each. Participants must indicate how much they have felt each affect on a five-point Likert scale (from 1 = not at all or very slightly to 5 = extremely) during the specified time period. The total for each scale is the summation of the scores given on the 10 items that comprise it, ranging from 10 to 50 points, where a higher score indicates a greater presence of the specific affect. The Spanish version reports high internal consistency, with a Cronbach's α of 0.87 for positive affect and 0.88 for negative affect (Vázquez et al., 2015).

It was designed to detect anxiety and depression disorders in non-psychiatric hospital settings in patients whose symptoms were not contaminated by the symptomatology of a physical illness. It consists of 14 items grouped into two subscales with 7 items each, using a Likert-type response scale ranging from 0 to 3 points. The depression subscale is composed of items focused on anhedonia. The anxiety subscale is composed of items focused on psychic manifestations. The temporal reference for the test is the previous week. For scoring, separate scores are obtained for each of the subscales, using the following cut-off points: 0-7: normal; 8-10: probable case of anxiety or depression; 11-21: case of anxiety or depression. It possesses a Cronbach's α of 0.90 for the full scale, 0.84 for the depression subscale, and 0.85 for the anxiety subscale.