This video shows Son Heung-min, a soccer player, playing early football, displaying a style of play different from what he showcases in the Premier League.
Though it may be challenging for non-Korean speakers to understand, I recommend giving it a watch if you want to see Son Heung-min's gameplay.
He continues to exercise even during the off-season... Well, that's expected, whether resting or not until retirement.
When the season starts, he needs to play for a long time, so maintaining the body's balance is crucial. I wonder if there are days when he doesn't exercise... As an athlete, it feels like he should do it every day.