This study investigates the influence of a remote, painful stimulus on stretch tolerance. Half of the participants will receive a conditioning painful stimulus following static stretching while the other half will rest quietly.

The effect of stretching on joint range of motion is primarily related to changes in the tolerance to stretch, but the mechanisms underlying this change are still largely unknown.

The nervous system has an inbuilt ability to modulate the perceived magnitude of afferent noxious stimuli via supraspinally mediated endogenous pain inhibition or facilitation and by engaging endogenous mechanisms pain tolerance in healthy individuals is known to increase. Thus increasing the tolerance to pain could potentially increase range of motion following stretching.

Inclusion Criteria:

• Eligibility for participation included the absence of any pain or other conditions that might affect the somatosensory system.

Exclusion Criteria:

• Substance abuse,
• History of neurological or mental disabilities
• Lack of ability to comply with instructions
• Delayed onset of muscle soreness.

Only males were included to avoid the potential effect that fluctuations in gonadal hormone values may have on the endogenous pain inhibitory mechanisms.