Routine exercise alters measures of immunity and the acute phase reaction.

Area of Science:

• Exercise physiology
• Immunology
• Clinical biochemistry

Background:

• Routine exercise is known for its anti-inflammatory effects.
• Understanding these effects is crucial for clinicians interpreting patient blood work.
• Reference intervals often reflect sedentary populations, necessitating comparison with active individuals.

Purpose of the Study:

• To compare resting blood inflammatory markers in routine exercisers with established reference intervals.
• To provide clinicians with data for interpreting blood tests related to inflammation, immune, and acute phase responses.
• To investigate the relationship between exercise load and specific immune markers.

Main Methods:

• Blood samples were collected from 119 adults (61 males, 58 females, aged 18-60) who reported regular exercise.
• Analyzed 20 biomarkers, including 11 immunological and 9 acute phase reactants.
• Compared participant data to laboratory reference intervals and correlated analyte values with self-reported exercise patterns.

Main Results:

• Mean values for most inflammatory analytes in exercisers were at the lower end of reference intervals.
• Over 10% of participants had below-reference levels for CD19+, CD8+, and NK cells.
• Over 10% showed below-reference levels for acute phase reactants like C3, haptoglobin, and ferritin.
• Resting IgM and IgG levels negatively correlated with exercise load.

Conclusions:

• Routine exercise reduces resting immune cell counts and concentrations of acute phase reactants.
• These systemic changes are adaptive and demonstrate the anti-inflammatory impact of exercise.
• Findings support the clinical significance of exercise in managing inflammatory conditions.