The study aims to compare the immediate effects of manual needle acupuncture and electroacupuncture on the explosive force production of quadriceps in asymptomatic subjects. The hypothesis is that there will be no statistically significant difference between manual acupuncture and electroacupuncture on explosive force production.

the significance of the study lies in the importance of explosive force in muscular performance, and previous research suggests that acupuncture may induce Post-activation potentiation (PAP) and improve muscle strength. However, empirical data on the immediate effects of acupuncture on explosive force production are lacking.The study will involve 66 young asymptomatic subjects divided into three groups: manual acupuncture, electroacupuncture, and sham acupuncture. Explosive force will be measured using an isokinetic device immediately after acupuncture treatment.

Inclusion Criteria:

• The subjects will be asymptomatic from both genders.
• Right leg dominant .
• Age between 18 to 23.
• Body mass index ˂ 25 kg/m^2.
• Normal daily life activities.

Exclusion Criteria:

• Needles phobia.
• Under supervision of other heath practitioner.
• Involved in regular strength training during 6 months prior to the study.
• Impaired sensation or any neurological/ musculoskeletal disorder.
• Pregnant females.

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