I think it definitely depends on your team, your coaching staff, practice intensity, etc. I’d prolly start with a minute/game intensity of 10-20% increase of full go in practice. So if they go 20 min full go in practice, 20-25 min the first game, and then elevate that each game/practice as you see fit. One of the benefits of college soccer is the ability to sub in and out as needed. So if this individual does the last 10 minutes of the first half, but then can come in halfway through the second half and see how long she can go.