Concurrent training is the idea of combining both endurance training and weight training into one program. The purpose of this study is to investigate the effects of concurrent training on cardiopulmonary response, power and endurance among young tennis players. Thirty young tennis players who are playing in Khazma Club and all registered in the Kuwaiti Union of Tennis, and their ages are rounding between 14.5 yrs to 15.5 yrs divided into three experimental groups concurrent (CG, n= 10), resistance (RG, n=10), and endurance training group (EG, n=10). Each group trained three times a week for eight weeks, all types of training in the same session. Parameters assessed the high, weight, and power, strength, training age, VO2 max (Astrand Treadmill Test was used to determine the VO2 max) and training experience. All participants were free of any disorders known to affect performance, such as bone fractures, Osterporosis, diabetes and cardiovascular disease or recent surgery. The participants did not report use off any anti-seizure drugs, alcohol and cartoon consumption, neither smoking cigarette. And all participants were fully informed about the aims of the study, and gave their voluntary consent before participation. The measurement procedures were in agreement with the ethical human experimentation. Participants completed 8-10 resistance-training exercises first, and then completed their hour of training by walking/jogging/running for up to 30 minutes on a treadmill at a prescribed target heart rate. Dynamometer instrument was measured the strength of leg and back. The results revealed that significant differences in Grip strength between Strength group and concurrent group for concurrent group. Taking into consideration that significant difference in Grip strength between endurance group and concurrent group for concurrent group, where significant differences in VO2 max between endurance group for concurrent group are calculated. There was a significant difference in LS between strength group and endurance group for strength group. No significant differences in LS between strength group and concurrent group were calculated and significant difference in LS between endurance group and concurrent group for concurrent group were calculated as well. While significant differences in BS between strength group and endurance group for strength group were calculated. No significant differences in BS between endurance group and concurrent group, and significant differences in BS between endurance group and concurrent group for concurrent group were calculated. In conclusion, the study has shown that eight weeks of concurrent strength and endurance training has beneficial effects on musculoskeletal power and VO2 max.