Thirty Seconds Sit-To-Stand Test (30STST). Evaluators will ask patients to place a straight-backed armless chair; with a hard seat ; which will be stabilized by placing it against a wall; considering floor to seat height will be between 45 - 50 cm. Seated participants will asked to come forward on the seat until their feet will be flat on the floor; and to fold their upper limbs across the chest; without moving it during all test. Patients will be then instructed to stand up all the way and sit down once without using the upper limbs. Patients will start in the seated position on the chair and; upon command telematically; they will stand up; and then they will return to sitting as many times as they could; in a 30-second time period. The evaluators will control this test telematically by videoconference.[days 0; 7 and 14 post-intervention commencement];Multidimensional Dysphnoea-12 (MD12) Spanish version. The MD12 questionnaire will be self-administered and will be performed at the end of the 30STST. Patients will send the results of MD12 screenshot daily to the evaluator; via WhatsApp or email. [Days 0; 7; 14 post-intervention commencement];Borg Scale (BS). The Borg scale; of perceived effort; measures the entire range of effort that the individual perceives when exercising. This scale gives criteria to make adjustments to the intensity of exercise; that is; to the workload; and thus forecast and dictate the different intensities of exercise in sports and medical rehabilitation. The BS will be completed by patients at the end of the test;( 30STST). Patients will send the results of BS screenshot to the evaluator; via WhatsApp or email.[Days 0; 7 and 14 post-intervention commencement]

Thirty Seconds Sit-To-Stand Test (30STST). Evaluators will ask patients to place a straight-backed armless chair; with a hard seat ; which will be stabilized by placing it against a wall; considering floor to seat height will be between 45 - 50 cm. Seated participants will asked to come forward on the seat until their feet will be flat on the floor; and to fold their upper limbs across the chest; without moving it during all test. Patients will be then instructed to stand up all the way and sit down once without using the upper limbs. Patients will start in the seated position on the chair and; upon command telematically; they will stand up; and then they will return to sitting as many times as they could; in a 30-second time period. The evaluators will control this test telematically by videoconference.[days 0; 7 and 14 post-intervention commencement];Multidimensional Dysphnoea-12 (MD12) Spanish version. The MD12 questionnaire will be self-administered and will be performed at the end of the 30STST. Patients will send the results of MD12 screenshot daily to the evaluator; via WhatsApp or email. [Days 0; 7; 14 post-intervention commencement];Borg Scale (BS). The Borg scale; of perceived effort; measures the entire range of effort that the individual perceives when exercising. This scale gives criteria to make adjustments to the intensity of exercise; that is; to the workload; and thus forecast and dictate the different intensities of exercise in sports and medical rehabilitation. The BS will be completed by patients at the end of the test;( 30STST). Patients will send the results of BS screenshot to the evaluator; via WhatsApp or email.[Days 0; 7 and 14 post-intervention commencement]