Monofins shapes and stiffness

Today I have realized that my bigger softer monofin works better than slightly smaller "extra stiff" one. Does performance depend more on size than on stiffness? I should probably study this subject.

New Anton's results

25m : 21.2s
50m : 50.5s

Although he starts much better now, I think further training here will give some benefits.
Exercises for leg muscles will improve stroke strength, so focus on this.

Anton's progress

Latest Anton's results:

25m : 22s
50m : 56s

Things to improve for him:
* Start time. It takes quite long for him to start going. Once this is improved it can take 1-2s from his results.
* Arms position. When this is improved, it can take 1s per 25m from his result.
Good progress!

50m for less than 23s

Nothing else to say really. This is my best result since I've resumed training