Age

18–65

Sex

ALL

Healthy volunteers

Not accepted

Psoriatic arthritis disease according to the CASPAR (Classification Criteria for Psoriatic Arthritis) criteria
Age range 18-65 years
Stable medication on anti- rheumatic drugs for \>3 months prior to inclusion and throughout the first 3 months of the study

Cardiovascular disease
Severe hypertension
Diabetes type I
Chronic obstructive pulmonary disease or other severe pulmonary diseases
Arthroplasty of large joints, lower extremities
Severe functional impairment precluding participation in high-intensity aerobic exercise
Inability to perform a cardiopulmonary exercise testing (CPET)
Pregnancy
BMI ≥35 kg/m²
Ongoing or planned initiation (within 3 months) of structured weight reduction therapy, pharmacological obesity treatment, or bariatric bypass surgery
Already participating in regular exercise at high intensity (BORG ≥15) for \>1 hour/ week during the past 6 months
Inability to understand and read Swedish

Combined High-Intensity Aerobic Training and Resistance Training in Psoriatic Arthritis