Abstract
Introduction: The aim of the study was to assess the effects of Apnea underwater training on physiological characteristics, Scuba diving Skills, fins swimming endurance, and breath hold time for scuba divers can establish underwater fitness with scuba diving equipment. The data was collected from randomly selected (20 mal) healthy divers in Egypt 2018.The physiological variables during tow Apnea methods Subject were tested on two separate times with spirometer and E.C.G. and diving skills consist of CESA, Swimming endurance tests. Control value for each parameter was calculated as an average value mean and standard deviation ±SD from apnea. Results: The relative changes were calculated for each subject, an individual mean value from the three last apneas in each condition was calculated for all parameters. The improvement of apneic time values was compared between, before and after, underwater Apnea program. Diving and swimming Skills variables were also compared between Apnea methods using paired t-test. The level used for accepting significance was *P< 0.05., heart rate, systolic blood pressure, diastolic blood pressure, cardiac output, heart stork volume, Oxygen Uptake, Carbon Dioxide Excretion, Static apnea. Discussion: The ventilator and cardiology parameters observed after Apnea workouts better and heart rat valuables, the apnea performance, diving and Swimming skills. These results became more significant, indicating the positive effect of Apnea method on performance. Using underwater Apnea exercise with SCUBA diving equipment can improve breath holding, SCUBA diving skills and improve apnea time for divers.