When I go to another athletes profile I want to do a couple of things:

• See their training week by week. This is difficult with one continuous scrolling list and dates that become hard to keep track of. Would be easier if there was a week-by-week view, or if you showed the day rather than date of the activity. 
• See their race activities. This is the most interesting part. Currently, there are workarounds by viewing their PRs which will find some race results, or by checking out event photos and navigating to the event. It would be great to be able to filter their activities to only show race results. It could be a special section (Races are special occasions) or you could provide the same search functionality that I can use on my own profile (filter to activity type = race) on every profile