Today, the Duke and Duchess of Cambridge and Prince Harry joined in a training session for the 2017 Virgin Money London Marathon with runners participating from Heads Together, a partnership of eight charities patronized by the trio. After meeting organizers and runners, William, Kate and Harry partook in a 50-meter sprint, which Harry won.

All three appeared in remarkably good spirits today – William’s facial expressions were hilarious and rival Kate’s when she’s watching tennis. Kate wore a red ski jacket from brand Perfect Moment with black skinny jeans and trainers. I was surprised, however, that while all three were dressed casually none were athletic wear.

The only remarks I’ve seen from the event came from William, which were:

“We want to normalize mental health, we want to get people talking about it, to make it more normal and to reduce the stigma. What you are doing and having so many of you here today, you’ve already seen the benefit of joining in, by being part of this marathon, we want to make it a mental health marathon. You are crucial to making this happen and we can’t do it without you. We really hope your training goes very well. Good luck with the training and we look forward to seeing you on the big day.”

The marathon will take place in April, however William, Kate and Harry won’t be participating due to security concerns. Today’s training session was a way to help make up for that and raise awareness for the event.

Today marks Kate’s first engagement in February. There was a two-week delay between this and her engagement with EACH in Norfolk, with some speculating that the Cambridges might have joined the Middletons for their annual trip to Mustique. This was shut down on Twitter yesterday, when reporter Emily Andrews confirmed that the couple had remained in the UK.

Tomorrow William and Kate will undertake two engagements in London on behalf of Place2Be, and the other at a Guild of Health Writers Conference.