> The 'stayhome' lifestlye, which fell mostly on weekends, is a red-herring, I simply slept longer when I didn't have to commute to work.

Is it?

First, whatever method you use should already take into account that sleep happens together with stayathome. Even basic regressions take into account that.

Second, staying at home means your eating binges are constrained by what's around you. If it is healthy stuff it might mean weight loss, if it is bread and chips the opposite