I played H20-polo in high school and college and never shaved for games. I never saw any of my teammates shave either.
To build speed in the water a variety of strength training methods can be utilized, including in-the-water specific resistance training, body weight exercises, resistance band exercises, free weights and machine weights. Some of what my college coach taught us included:
* Every day in the water resistance training (sprints, resistance cord exercises, heavy balls, etc)
* Year around rotator cuff and scapular stabilizer strength training using resistance cords and dumbbells.
* In season circuit training program utilizing resistance cords, body weight exercises and dumbbells.
* Off-season dry-land resistance training program utilizing free-weight and machine- based moderate (2 sets of 8-12 repetitions) weight exercises that are specific to water polo and that incorporate both pushing and pulling types of exercises.