Table 1.

Eligibility criteria.

Inclusion Criteria

Exclusion Criteria

Age 18–65 years Subjectively perceived stress ≥ 4 out of 10 on a numeric analog scale (Numeric Rating-Scale, NRS 0–10, 0 = no stress at all to 10 = maximum stress) for ≥1 month At least 3 of the following 8 stress symptoms: sleep disorder, inappetence or increased appetite, shoulder neck tension/back pain, tension headache, concentration disorder, exhaustion, nervousness/irritability, stress-associated digestive problems

Pregnancy or breastfeeding Serious acute or chronic illness Serious mental illness Immobility/limitation for gymnastic exercises due to orthopedic, neurological, or other medical reason Participation in another study