Final answer:
Level 4 in swimming represents a more advanced level where the swimmer refines stroke techniques, improves breathing and efficiency for both freestyle and backstroke, and masters roll-overs for turns.
Step-by-step explanation:
In swimming, progress from Level 3 to Level 4 often denotes an improvement in skills, endurance, and technical finesse. The differences between the levels can be quite significant, depending on the program or curriculum being followed.
Freestyle
In freestyle, a Level 4 swimmer may focus on refining their stroke technique, increasing stroke efficiency, and improving their breathing patterns. They might also work on endurance to swim longer distances without rest. Flip turns, a more advanced skill, are often introduced at this level.
Backstroke
For backstroke, Level 4 swimmers might emphasize consistency in stroke rhythm and learning to maintain a straight trajectory without lane line guidance. They will also refine their arm pull to maximize propulsion. Backstroke starts and flip turns could be introduced at this level.
Roll-Overs
With regard to roll-overs, a Level 4 swimmer will typically use roll-overs as part of their turns and streamlining off the walls for both freestyle and backstroke. This includes coordinating breathing with the roll-over to ensure a seamless turn and push-off.
Overall, Level 4 is about taking foundational skills to a more advanced level with increased independence, efficiency, and technique in the pool.