So I got super lazy over the summer and didn't practice much yoga. I was thinking I'd lose the ability to do a headstand. Welll I just did one for the first time this year and I can still do it!!!! You have no idea how happy it made me. Also my calfs at the end of last semester were a-mazing and I was too lazy work out as much as I did during school, but it didn't matter because my calfs look just as amazing as they did before.
In short - I didn't lose my conditioning or definition because of my laziness over the summer.