Muscular soreness following prolonged intermittent high-intensity shuttle running

Area of Science:

• Sports Medicine
• Exercise Physiology
• Biochemistry

Background:

• Intermittent high-intensity exercise, common in sports like soccer, can induce muscle damage.
• Understanding the physiological responses to such exercise is crucial for athlete recovery and performance.

Purpose of the Study:

• To investigate the effects of prolonged intermittent shuttle running on muscle soreness.
• To measure serum markers of muscle damage following this type of exercise.

Main Methods:

• Sixteen male participants were divided into a running group and a control group.
• The running group performed the Loughborough Intermittent Shuttle Test (LIST) for 90 minutes.
• Muscle soreness and serum creatine kinase (CK) and aspartate aminotransferase (AST) levels were monitored for 72 hours post-exercise.

Main Results:

• Serum CK and AST levels significantly increased immediately after exercise and remained elevated for 48 hours, peaking at 24 hours.
• Muscle soreness increased significantly for 72 hours, peaking between 24-48 hours post-exercise, with hamstrings being the most affected area.
• No significant changes in soreness or enzyme markers were observed in the control group.

Conclusions:

• Unaccustomed prolonged intermittent shuttle running leads to substantial muscle soreness and muscle damage.
• Muscle soreness intensity was not directly correlated with serum enzyme levels (CK, AST).
• The findings highlight the significant physiological stress induced by this exercise modality.