Leg weights

Nothing, everything has to be maintained in some manner or it was useless to develop.

The problem with squatting several times bodyweight, is that you have to maintain it, even when you dont need it (when weather is good enough to train outdoors.)
How many sprinters do you now that half squat several times bodyweight?
You cant just go back to heavy weightlifting after dropping it for two weeks during a good weather spell. You’d blow out a hamstring, glute or quadricep.
This is a ridiculous statement. You can’t go back to anything that’s done at 95-100% intensity without working back up to it, without the risk of inuury. This includes Max V sprinting. So what?
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So you have to stay in the gym, when that time would be better spent with more ideal training.
What is the ideal training if you can’t go outside and don’t have proper indoor facilities for sprinting? Core work?
You become fixated on how much weight you can lift, and start doing silly things like ‘complex weightlifting cycles’. What a distraction!
Yes, let’s not do any max strength training that might actually improve max strength.

Core training exercises, or light work with kettlebells, med ball, a few callisthenics, skipping etc… can keep you fit and strong indoors.
Fit, maybe. Strong, no way.
Yet you dont have to maintain those sessions so much, when weather permits you to train outdoors on the track or field. You can go back to those basic, athletic and light indoor sessions any time you like, with allmost neglible loss of form in them.
Its easy to maintain when your gains and strength levels are low. Lets just tell all sprinters to stay weak so they don’t have to maintain that strength. Or better yet, maybe you can convince all spriners that they can build all the strength and hypertrophy they need by riding a bike…