Intermittent but Not Continuous Static Stretching Improves Subsequent Vertical Jump Performance in...

Area of Science:

• Sports Science
• Exercise Physiology
• Biomechanics

Background:

• Static stretching is commonly used to improve flexibility.
• The acute effects of different static stretching protocols on subsequent athletic performance remain debated.
• Flexibility-trained athletes, such as gymnasts, may respond differently to stretching interventions.

Purpose of the Study:

• To compare the effects of intermittent versus continuous static stretching on vertical jump performance.
• To investigate the acute impact of stretching protocols on countermovement jump (CMJ) height in elite gymnasts.
• To analyze changes in joint range of motion (ROM) following different stretching durations.

Main Methods:

• Sixteen elite male gymnasts participated in a randomized, counterbalanced study.
• Participants performed 90 seconds of either intermittent (3x30s with 30s rest) or continuous static quadriceps stretching.
• Countermovement jump (CMJ) height and joint ROM were measured before, immediately after, and up to 10 minutes post-stretching.

Main Results:

• Intermittent stretching significantly increased CMJ height by 8.1% (2.2 cm) 4 minutes into recovery.
• Continuous stretching significantly decreased CMJ height by 17.5% immediately after and 12.0% at 1 minute post-stretching.
• Both stretching protocols similarly increased hip and knee joint ROM, indicating no difference in flexibility gains.

Conclusions:

• Intermittent static stretching can enhance subsequent vertical jump performance in flexibility-trained athletes.
• Continuous static stretching acutely impairs vertical jump performance.
• The mode of static stretching is a critical factor influencing acute performance outcomes in athletes.