MODEL OF BUTTERFLY SWIMMING TECHNIQUE
 FULL STROKE CYCLE AIM of movements High forward speed !
General cognitive assignments: Avoid unnecessary movements during all phases Optimum alterations of action and relaxation of muscles during pull and recovery actions Increase propulsive forces by stroking with arms and kicking with legs Decrease resistance to the body at all times Ensure rigid transfer of power to the body from strokes and kicks through locked joints in right timing Realise aims of movements in each phase but also prepare for the movements in following phase Co-ordinate good breathing actions with movements as follows: Combine exhaling with pulling and pushing arm action Inhaling at the beginning of arm recovery, Hold the breath during arms entry STROKING PERIOD AIM of movements Try to increase forward speed !
  Parameters: Forward movement during stroke: 1.0 - 1.3 (metres) (This parameter indicates how effective is swimmers stroke. It must be half from full cycle stroke length) Relative stroke speed of hands backward: (-0.8) - (-0.2) (m/sec) (If arm stroke is effective and rational, then hands horizontal speed component backward during stroking, related to water, must be slow to create body speed forward) Cognitive assignments: Make stroke soft at the beginning with acceleration at the end, with good water feeling and low relative hand speed - sticking to water Move forward as much as possible during stroke period PHASES: 1. ARM PULL PHASE  AIM of movements Try to increase forward speed !
 Parameters: Forward speed during arm pull: 1.5 - 1.9 (m/sec) (This parameter shows efficiency of first part of stroke- pulling) Hands pulling slip forward -backward 0.30 - 0.03 (m) (This parameter indicate economical side of that arms pull and quality of feeling of water during first part of stroke) Requirements for self control: The arm action at the beginning of pull must be with good catch, aside down, with high elbow position The leg action during the pull must be quick with overextension of knees The shoulders and body action during the pull must be relatively high with good overextension of upper part of body Hands slip during pull must be positive, gliding forward, body moving on the pull Position of arms at the middle of stroke must be almost vertical, hands in front of shoulder line. 2. ARM PUSH & LEG KICK PHASE AIM of movements Try to reach maximum forward speed !
  Parameters: Forward speed during push: 2.0 - 2.5 (m/sec) (This parameter shows efficiency of co-operation work done by strong arms pushing actions as well as by impulsive legs kick same time) Hands pushing slip backward (-0.50) - (-0.30) (m) (If hands are slipping too much backward, then it means that arms are working relatively alone, “breaking” water with high power) Requirements for self control: The arm push must be long, with elbows close to body and wrists locked The leg kick during push must be with good transfer of force, impulsive, correct timing for fixing knees and high hip at the end of kick Keep the body position high, flat and horizontal. Extending chin forward and not rising shoulders too much. Avoid hands slip through the water - try to stick them   FLYING PERIOD AIM of movements Try to maintain forward speed !
Parameters: Forward movement during recovery & entry: 1.0-1.3 (m) (This parameter indicates how effective is swimmers flight and arms recovery. It must be another half from full cycle stroke length or even longer ) Hand speed during recovery & entry: 4.0-5.0 (m/sec) (Parameter shows arms recovery speed forward together with body. Too high speed of hands without good forward speed of body, same time, indicate lack of feeling bringing arms forward and momentum from quick arms recovery reacting against good forward mome Cognitive assignments: Bring arms forward with body, not too quickly, with flying action Move forward during that period even more than during stroke PHASES: 3. ARMS RECOVERY & FLY PHASE  AIM of movements: Try to maintain forward speed !
 Parameters: Forward speed during flight: 1.5 - 2.0 (m/sec) (Parameter indicate efficiency of streamlined body position during flight as well as preparation movements of arms and legs for the next stroke. Comparison that speed with speed during stroke shows rationality of speed fluctuation of stroke cycle) Requirements for self control: Keep the body flat, high position during arm recovery, also rising legs up with slight overextension as during pull. The timing of head entry at the end of inhalation must be before the arms enter, with the hands passing the shoulder line. The exact timing of hands entry after recovery must be at the same time as the start of leg kick down. The entry of arms must be soft, shoulder wide, palms down and without splashing. 4. LEG KICK & ARMS ENTRY PHASE AIM of movements: Try to recover lost forward speed !
  Parameters: Forward speed during kick: 1.5 - 1.9 (m/sec) (Parameter indicate efficiency of that kick and technique of arms entry) Requirements for self control: The head action during entry must be with chin moving forward Kick must be with good transfer of force, correct timing for fixing and rising knees and only raising hips up at the end, feet not too deep. During the kick keep the body horizontal, flat and without the shoulders sinking too deep
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