Nothing wrong with intervals every swim; I never get in the water and swim the race distance straight unless it is actually a race. Further, my normal swim workout is in the 2500-3500m range and I would never hit the pool to do that workout without breaking it up into intervals.
However, you want to vary the workouts in terms of length, intensity and recovery. There are five paces that I normally use while swimming:
Easy - warmup, cooldown, drills, recovery sets
Moderate - used in the mainset when endurance is the focus; these sets will be slower than threshold pace and have very short recovery
(5 seconds for 50-200's, 10 seconds for 250-400's
)
Threshold - swimming just slower than 1500m race pace; these have short recovery
(10 seconds for 100's, 20 seconds for 200's, etc
)
Fast - swimming faster than 1500m race pace; typically a short set
(max of about 300
) with longer rest or active recovery
(300 with 100 easy non-free recovery
)
Sprint - all out; very short set
(max less than 60 seconds
) with long recovery
(equal or slightly longer than swim time
(25's on 60 seconds, 50's on 2 minutes
).
Shane
Edited by gsmacleod 2009-08-19 8:14 PM