It has clearly worked too. He crossed the whitewash in the impressive first win for the Ospreys in Edinburgh since 2012. Then, of course, there is the little matter of becoming a father.
Smith, 26, admits he felt he needed to add some weight to improve his power at the scrum and some tonnage to his work at the ruck and tackle area. His work rate and mobility around the field have always been key parts of his game, but his desire to improve is impressive.
His weight has gone from 109kg when we went into lockdown back in March to 116kg at the start of the new Guinness Pro14 campaign against Edinburgh in October.
“I have always struggled with little injuries and my weight and, I know lockdown was tough on everyone, but it was sort of a golden opportunity, with no games, to try to put a bit of weight on,” said Smith.
“I spent a lot of time in my garage, trying to put some weight on, so lockdown was good for me.
"When I was younger I probably was in the category of having a bit of belly on me and I needed to lose that, but the last couple of years I have been paying 109kg or 110kg, which is quite light as a prop.
“It is tough to put weight on when you are playing because rugby is such a demanding sport. Even though lockdown was hard on everyone, it was an opportunity for me to go, no games for a while, lock myself in the garage and eat well and try to put a bit of bulk on.
“I think I have the balance right at the moment. You are never perfect, and I could probably be a bit heavier, but I am always striving to be fitter and stronger. I feel I am in a good place physically and I am raring to go.”