And fret not, Bolts fans. It's pretty difficult to hurt yourself wakesurfing. Inboard boats are used to render the chance of falling and hitting a propeller basically impossible.
"When I was growing up, I used to love to do all the water sports and everything," Johnson said. "But those are a little bit dangerous in the aspect that I really don't want to get injured doing something fun. Surfing is so nice when you do fall or you do mess up, it's basically just jumping in the water from a swimming pool or whatever. That was the reason why I started to do it in the first place and been having a lot of fun with it."
A typical offseason day for Johnson goes like this: skating in the morning, training in the afternoon and then a round of golf or some wakesurfing to wind down.
"During the season, you're around hockey so much that for the offseason, you try to get away from it as much as you can," Johnson said. "Obviously, you're still training, getting ready in every other aspect. Just being out on the boat is just so relaxing to me. Throw in some surfing with that, it's a pretty good day."
It's a pretty good workout too. Wakesurfers use muscles in their lower body that aren't actively engaged in more traditional training exercises. That extra bit of lower body work certainly doesn't hurt in Johnson's preparation for the upcoming hockey season.
"It definitely is hard work," he said. "Your quads and your calves really feel it. The first time every summer, my legs are pretty sore afterwards."
Johnson has a group of friends he'll text throughout the day to see who's ready to go on the boat that afternoon. One of those friends is Ottawa Senators forward Bobby Ryan, who also owns a summer home in Idaho.
"We have a group up there that we try to get out quite a bit," Johnson said. "Either do that or go golfing. Try to do something outdoors, get out of the house a little bit. It's kind of an active recovery in a way."
The sport is growing in popularity too. On Thursday, Lightning defenseman Mikhail Sergachev posted his own wakesurfing photo to twitter.