After the interventions, the authors reported that the moderate COVID-19 group showed improvement in the dynamic muscle strength of the lower and upper limbs, maximum lumbar isometry—traction force, flexibility, and markers such as albumin, CRP, fasting glycemia, and triglycerides; for the severe COVID-19 group, improvements were seen in the dynamic muscle strength of the lower limbs and lower CRP and triglyceride values; for the control group, improvements were seen in abdominal repetitions, CRP, fasting glucose, TC, and triglycerides. This evidence concerns the gene ALB and COVID-19.