1. Start — The forward start shall be used.
2. Stroke — After the start and after each turn when the swimmer leaves the wall, the body
shall be kept on the breast. It is not permitted to roll onto the back at any time. Throughout
the race the stroke cycle must be one arm stroke and one leg kick in that order.
All movements of the arms shall be simultaneous and in the same horizontal plane without
The hands shall be pushed forward together from the breast on, under, or over the water.
The elbows shall be under water except for the final stroke before the turn, during the turn
and for the final stroke at the finish. The hands shall be brought back on or under the surface
of the water. The hands shall not be brought back beyond the hip line, except during
the first stroke after the start and each turn.
During each complete cycle, some part of the swimmer’s head shall break the surface of the
water. After the start and after each turn, the swimmer may take one arm stroke completely
back to the legs. The head must break the surface of the water before the hands turn
inward at the widest part of the second stroke.
3. Kick — After the start and each turn, a single butterfly kick, which must be followed by a
breaststroke kick, is permitted during or at the completion of the first arm pull. Following
which, all movements of the legs shall be simultaneous and in the same horizontal plane
without alternating movement.
The feet must be turned outwards during the propulsive part of the kick. A scissors, alternating
or downward butterfly kick is not permitted except as provided herein. Breaking the surface
of the water with the feet is allowed unless followed by a downward butterfly kick.
4. Turns and Finish — At each turn and at the finish of the race, the touch shall be made with
both hands simultaneously at, above, or below the water level. The head may be submerged
after the last arm pull prior to the touch, provided it breaks the surface of the water at some
point during the last complete or incomplete cycle preceding the touch.