4-week stretching program after submaximal strength exercise affects performance but not heart rate variability and...

Area of Science:

• Exercise Physiology
• Sports Science
• Rehabilitation

Background:

• Stretching is known to improve athletic performance and cardiovascular adaptations.
• The specific effects of preventative stretching on recovery and performance after strength exercises require further investigation.

Purpose of the Study:

• To evaluate the impact of a 4-week preventative stretching routine on heart rate variability, heart rate recovery, blood lactate clearance, and performance after submaximal strength exercises.
• To compare these outcomes between a stretching group and a control group.

Main Methods:

• Twenty-four healthy adults were randomly assigned to a stretching or control group.
• Both groups performed submaximal strength exercises (bench press, back squat) before and after the 4-week intervention.
• The experimental group followed a specific stretching protocol, while the control group maintained their regular training.

Main Results:

• A significant improvement in squat repetitions was observed in the stretching group compared to the control group post-intervention.
• No significant differences were found between groups in heart rate variability, heart rate recovery, blood lactate levels, or bench press repetitions.

Conclusions:

• A 4-week preventative stretching program is insufficient to enhance cardiovascular adaptation or lactate clearance in resistance-trained individuals.
• The observed improvement in squat repetitions suggests a potential mitigating effect of stretching on muscle fatigue, though further research is needed.