Fotobiomodulace při syndromu chronické únavy

Low-level laser therapy will be delivered using a Class 3B laser device (808 nm wavelength, 100 mW power output). The laser will be applied in contact mode using a static technique perpendicular to the skin surface.

Treatment will target bilateral muscle groups: upper trapezius, biceps brachii, posterior deltoid, lumbar paraspinals, gluteus maximus, and vastus lateralis. Each muscle will receive irradiation at 16 points spaced 1 cm apart, delivering 4 Joules per point (total 64 Joules per muscle).

Sessions will be conducted three times per week for 8 weeks (total 24 sessions).

Participants in this group will receive low-level laser therapy applied bilaterally to multiple muscle groups, including upper trapezius, biceps brachii, posterior deltoid, lumbar paraspinals, gluteus maximus, and vastus lateralis.

Each muscle will be treated at 16 points spaced 1 cm apart, with an energy delivery of 4 Joules per point (total 64 Joules per muscle). The therapy will be administered three times per week for 8 weeks (total 24 sessions).

Low-level laser therapy will be delivered using a Class 3B laser device (808 nm wavelength, 100 mW power output). The laser will be applied in contact mode using a static technique perpendicular to the skin surface.

Treatment will target bilateral muscle groups: upper trapezius, biceps brachii, posterior deltoid, lumbar paraspinals, gluteus maximus, and vastus lateralis. Each muscle will receive irradiation at 16 points spaced 1 cm apart, delivering 4 Joules per point (total 64 Joules per muscle).

Sessions will be conducted three times per week for 8 weeks (total 24 sessions).

Fatigue will be assessed using validated self-reported instruments to evaluate the effect of photobiomodulation therapy on chronic fatigue symptoms.

The Fatigue Severity Scale (Fatigue Severity Scale) is a 9-item questionnaire that measures the impact of fatigue on daily functioning. Each item is scored on a 7-point Likert scale, and the final score is calculated as the mean of all items, with higher scores indicating greater fatigue severity.

The Multidimensional Fatigue Inventory (Multidimensional Fatigue Inventory) is a 20-item instrument assessing five dimensions: general fatigue, physical fatigue, mental fatigue, reduced activity, and reduced motivation. Each domain is scored on a 5-point Likert scale, with higher scores indicating increased fatigue.

Quality of life will be assessed using either the Medical Outcomes Study 36-Item Short Form Health Survey (Short Form-36 Health Survey) or the World Health Organization Quality of Life Brief Version (World Health Organization Quality of Life-BREF).

The Short Form-36 Health Survey evaluates eight domains including physical functioning, bodily pain, vitality, and mental health. Scores range from 0 to 100, with higher scores indicating better quality of life.

The World Health Organization Quality of Life-BREF consists of 26 items covering physical, psychological, social, and environmental domains, with higher scores indicating better perceived quality of life.

Psychological well-being will be assessed using either the Hospital Anxiety and Depression Scale (Hospital Anxiety and Depression Scale) or the Beck Depression Inventory (Beck Depression Inventory).

The Hospital Anxiety and Depression Scale includes 14 items divided into anxiety and depression subscales, each scored from 0 to 21.

The Beck Depression Inventory is a 21-item self-report questionnaire with scores ranging from 0 to 63, where higher scores indicate more severe depressive symptoms.