Scientific background: Post activation potentiation using strength exercises during warm-up could increase the production of maximum energy especially in sports activities that require speed and strength. The research aims to study the effect of two modes of post activation potentiation using strength exercises while warm-up on arms muscle. Methodology: Twelve students from the department of Physical Education and Sports Science at Sultan Qaboos University (20.8 +0.9 years) participated in this study. The participants visited the sports hall at Sultan Qaboos University for eight times. The visits from 1-5 were assigned to get used to the Wingate test, as well as to do two measurements of Wingate test for each individual sample to study the reliability of the test, and also measure the maximum frequency of each player (one repetition maximum-1RM). During the following visits, three research situations have been applied randomly: 1) warm-up without post activation potentiation + arms Wingate test. II) Warm-up with post activation potentiation by 3 sets of 6 repetitions at 45% of RM + arms Wingate test. III) Warm-up with post activation potentiation by 3 sets of 3 repetitions at 90% of RM + arms Wingate test. Results: The results showed that post activation potentiation during warm-up using strength exercises at 45% and 90% of RM increase arms mean power, compared to warm-up without post activation potentiation. However, no differences have been found between post activation potentiation using strength exercises at 45% and 90% for absolute and relative arms mean power. Post activation potentiation using strength exercises at 45% of RM increases arms muscle peak power than post activation potentiation using strength exercises at 90% of RM (P<0.05). Conclusion: The study concluded that post activation potentiation during warm-up using strength exercises at 45% and 90% of RM have a positive effect on arms muscle mean power. Furthermore, post activation potentiation during warm-up using strength exercises at 45% of RM have a positive effect on arms muscle peak power. Keywords: Warm-up, post activation potentiation, Strength exercises, arms, muscle peak power, muscle mean power.