← Insights & stories

Case study · INTENNSE · 2026 season

We train the body for hours. Who trains the mind?

What happened when a professional tennis league built mental and emotional fitness into the whole season, and why the same system works far beyond sport.

INTENNSE players and coaches at the season kickoff in Atlanta

The gap between belief and practice

We asked players what percentage of tennis they think is mental. Answers ranged from 20 to 50%. Then we asked how much of their training went to the mind. The answer was a lot less. That gap is the opportunity.

What INTENNSE built

The league came with three asks: a public commitment to mental health through the Not Alone campaign, a pre-season community event, and a curriculum that would run through the season. Together we built a system with layers that reinforce each other:

What happened

76 of 80 players answered the post-season survey. Across ten mental and emotional fitness dimensions, 79% of ratings improved. Only 2% declined.

95%survey response rate
84%more confident supporting a teammate emotionally
82%more confident bringing in support for someone struggling

The finding we keep coming back to is the order. The two highest-scoring dimensions were both about someone else. Players got better at supporting a teammate before they got better at managing themselves. That is the peer support design doing exactly what it was built to do.

“I have always been very independent with my tennis career, but this experience reminded me that I do not have to do everything on my own.”

INTENNSE player

The lift was also unusually universal. The best-prepared players rated the course highest, while players who started in the bottom half of baseline wellness posted gains nearly identical to the cohort average.

“I was going to quit playing earlier this year and start coaching, but it gave me a new hope and confidence in myself which I will carry forever.”

INTENNSE player

Why it goes beyond the court

This reads like a tennis story, but it is a people story that happened to play out on a court. Train one athlete and you help one athlete. Train the locker room and you change what happens to everyone in it. The same system fits a finance team, a nursing unit, a faculty lounge or a sales floor.

Bring this to your people.

Connect with us →