When you do physical training, such as lung capacity training, you do not start at maximum. You go up.
If you scroll down the page you can see that they are trying to start an app with 5-minute health activities.
If you scroll down the page you can see that they are trying to start an app with 5-minute health activities.
My take on their message, "Hey, we're making an app that helps boost your health with quick 5-minute activities." is that I'd receive something like a meditation + breathwork + gratitude journaling app which, in sum, accounts for five minutes of activity, not that their intent was to increase my lung capacity to five minutes.