Kovalev seems to have made some serious lifestyle changes since his loss to Ward.
https://www.si.com/boxing/2017/11/21/sergey-kovalev-vyacheslav-shabranskyy-light-heavyweights
https://www.si.com/boxing/2017/11/21/sergey-kovalev-vyacheslav-shabranskyy-light-heavyweights